2021 Toyota Highlander

Defect. Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2021-2025 Highlander and Highlander Hybrid vehicles. The second-row seat backs may fail to lock into position during seat back adjustment.

Risk. A seat back that fails to lock may not properly restrain an occupant during a crash, increasing the risk of injury.

Remedy. Dealers will replace the return springs in the seat back recliner assemblies, free of charge. Owner letters were mailed September 9, 2026. This is a phased recall. Owners may contact Toyota’s customer service at 1-800-331-4331. Toyota's numbers for this recall are 26TB06 and 26TA06.

Defect. Southeast Toyota Distributors, LLC (SET) is recalling certain 2021-2024 Highlander vehicles. The 20-inch accessory tires with an insufficient load rating for the vehicle's Gross Axle Weight Rating (GAWR) were installed. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 110, "Tire Selection and Rims."

Risk. Tires with an insufficient load rating can be overloaded and fail, increasing the risk of a crash.

Remedy. SET will inspect and replace the tires and information placard, as necessary free of charge. Owner notification letters were mailed August 16, 2024. Owners may contact SET's customer service at 1-866-405-4226. SET's number for this recall is SET24A.

Defect. Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2020-2021 Avalon, Avalon Hybrid, Corolla, Highlander, Highlander Hybrid, RAV4, RAV4 Hybrid, Lexus ES350, Lexus RX350, Lexus RX450H, 2021 Sienna Hybrid, Lexus ES250, 2020-2022 Camry, Camry Hybrid, and ES300H vehicles. A short circuit may develop in the Occupant Classification System (OCS) sensor, preventing the front passenger air bag from deploying.

Risk. An air bag that does not deploy during a crash increases the risk of injury.

Remedy. Dealers will inspect and replace the sensor as necessary, free of charge. Interim letters notifying owners of the safety risk were mailed in February 2024. Some final remedy owner letters were mailed October 31, 2024. Letters will continue to be mailed in phases through January 2026. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's number for this recall is 23TB15/23TA15 Lexus 23LB03/23LA03.

Defect. Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2020-2023 Highlander & Highlander Hybrid vehicles. During normal vehicle operation, minor impact to the front lower bumper cover may result in the cover coming loose or detaching.

Risk. A detached front bumper cover can become a road hazard, increasing the risk of a crash.

Remedy. Dealers will repair or replace the upper and lower front bumper covers as necessary, free of charge. Owner letters were mailed April 22, 2024. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's number for this recall is 23TB12/23TA12.

Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to …

The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant leaks.

22TD02 expired on 2/7/2025 A seam near the fuel inlet may not have been properly sealed during manufacturing. This can allow water to leak into the interior area of the vehicle, behind the third-row seat, when the vehicle is exposed to wet environmental conditions like rain or a car wash.

22TD02 expired on 2/7/2025 A seam near the fuel inlet may not have been properly sealed during manufacturing. This can allow water to leak into the interior area of the vehicle, behind the third-row seat, when the vehicle is exposed to wet environmental conditions like rain or a car wash.

TT: Some 2014-2021 model year vehicles equipped with Dynamic Torque Control AWD system may experience a ?Noise? or ?Abnormal Operation? condition from the rear differential front coupling. In some cases, even an ?AWD System Message? with or without a DTC may be present with or without other conditions present.

TSB: Some 2021 model year Avalon, Highlander, and Camry vehicles equipped with UA80E or UA80F transmissions may exhibit a whine or grind noise from the transmission. This condition may be caused by an issue with the front carrier assembly pinion shafts. Follow the Repair Procedure in this bulletin to address this condition.

My 2021 Toyota Highlander XLE began making a high-pitched whining noise when accelerating. When researching this noise, associated with the make, model, and year of my vehicle, it became apparent that the noise is associated with a manufacturer's defect in the [XXX]‑speed transmission (Toyota [XXX]). The cited notification states that the correction for this defect is a transmission replacement that is only covered by the 60,000 mile/5 Year warranty. There are three class-action lawsuits associated with this issue, and I wanted to document my incident in the event that my service appointment with [XXX] Toyota in [XXX], on 11/23/2026 indicates that my transmission is affected by the defect so many have experienced. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

When driving I had to brake hard to avoid a collision. My daughter was riding in the front passenger seat. Both my daughter and myself were buckled in our seat belts. When I had to brake, her seat moved all the way to the front position and she was thrown forward towards the front windshield. There is an active recall for my car where the recliner assemblies in the second-row seats may not fully lock after seat back adjustment. This seems to be the exact same issue but we experienced this with the front passenger seat. I reported the issue to Toyota but my vehicle has not been inspected yet. I am having the rear recall fix completed in late November. The issue put my daughters safety at risk and was very alarming for both of us. There were no warning messages or symptoms of a problem with the seat.

I recently purchased a 2021 Toyota Highlander Platinum. Within a few weeks from purchase, the transmission started making a whining noise. Upon further research, it was discovered that Toyota has been installing the UA80=F transmission in their vehicles, knowing full well that there are serious issues with this particular transmission. But yet they continued using this transmission. Someone needs to address this issue and hold their feet to the fire.

The contact owns a 2021 Toyota Highlander. The contact stated that while driving at slower speeds and attempting to park the vehicle, the vehicle unintendedly accelerated into a rail while the brake pedal was depressed. The vehicle was towed to a nearby Collision Center for the repair. The contact sustained injuries to the left leg, left hand, and left elbow. The contact sought medical attention for the injuries. The manufacturer was made aware of the failure by telephone. The failure mileage was approximately 150,000.

On November 19, 2025, the 12.3-inch infotainment display in my 2021 Toyota Highlander Limited went black and never recovered. That screen is the only display for the rear-view backup camera. With it dead, there is no backup camera image when reversing. The failure started as an intermittent blank screen with the reverse camera still working, then progressed to a fully dead screen including the backup camera display. A replacement display unit did not fix it. Toyota has acknowledged this defect in Technical Service Bulletin T-SB-0055-22, which identifies the integration control sub-assembly (part 840C2-48010) as the cause, but has not issued a recall. Toyota service repeatedly diagnosed the problem as a failed head unit. I replaced the head unit at my own expense and the screen still did not work. When I returned to the dealer, they refused to perform further diagnostics, stating the diagnostic cost would be as much as the head unit replacement.

The contact owns a 2021 Toyota Highlander. The contact stated that while driving at an undisclosed speed, there was a loud high-pitched whining sound coming from the vehicle. The contact stated that the vehicle hesitated while accelerating and the transmission was shifting rough. The contact stated that the vehicle had experienced an internal transmission failure. The manufacturer was notified of the failure. A local dealer was contacted and associated the failure with Toyota Technical Service Bulletin: 0008-21. The contact stated that a diagnostic test was scheduled. The failure mileage was 70,100.

Noticed a whine noise slowly progressing over a couple of weeks. Researched the sound and took it for diagnostic eval. with Holman Toyota in Mt. Laurel, NJ on 10/3/2026. As suspected, the transmission is failing. Mechanic documented via video the fluid sample containing suspended metallic particles with discoloration and burnt odor. They also verified the whining sound coming from the transmission. This is a known failure for the 2021 highlander with a TSB bulletin. Although they have yet to place a recall. There were no warning messages. The complete failure of a transmission while driving could cause sudden immobilization and most certainly result in an a motor vehicle accident. The vehicle has under 54,000 miles and is about 10 weeks outside the warranty.

When traveling at slower speeds and applying the brakes on a slight decline, my 2021 Toyota Highlander HYBRID lurches forward with alarming force. On probably 5 separate occasions, this has nearly resulted in me lurching into traffic running perpendicular to me. I have come within 2-3 feet of lunging into oncoming traffic and I am probably the poster child for defensive driving. I had to push the brake petal forcefully to stop. I have not allowed my daughter to drive my car because of this. I first noticed this maybe 2-3 years ago? That's a guess. Why have i waited? b/c i'm a fool and poor at executive function. I looked it up, and apparently Toyota is aware of this problem (T-SB-0059-23) but apparently has NOT ISSUED A SAFETY RECALL. This is truly shocking to me, considering the recalls i've seen so far with this vehicle have been for things that do not appear as alarming or potentially dangerous as this. According to Toyota, they will only cover this defect up to 36K miles or 36 months (whichever 1st). I called 2 of my local dealerships and neither "service mgr" knew anything about it. Unacceptable. One of them, AFTER they said this, refused to even look up the TSB#, stating 'that's not the way we do it. You have to make an appt.' Absolutely ridiculous. Toyota should be forced to ISSUE A SAFETY RECALL. I've read it's a software fix. CHEAP and EASY for a multi-national corp. Perhaps NHTSA was unaware of the seriousness of this problem before and I know that happens, but I'm

We bought a 2021 Toyota Tacoma Platinum in November 2020. In February 2021, Toyota issued a Technical Service Bulletin T-SB-0008-21. The bulletin say transmissions may exhibit a whine or grind noise from the transmission. This condition may be caused by an issue with the front carrier assembly pinion shafts. This bulletin says repair is covered under the Toyota Powertrain Warranty. This warranty is in effect for 60 months or 60,000 miles, whichever occurs first, from the vehicle’s in-service date. Our transmission began making this noise around 75k miles, outside the warrant. Toyota knew about this problem over 5 years ago and did not take action to recall it. Now this repair is going to cost between $9,000 to $12,000 out of pocket. I cannot afford this repair. I have uploaded the bulletin from Toyota.

65K miles on the vehicle and have started to get a whining noise from the transmission during acceleration. UA80F transmission installed with multiple class action lawsuits against Toyota for this issue as it leads to catastrophic failure with high replacement cost. Stopped driving the vehicle and looking into transmission replacement options. Toyota needs to be held liable for mechanical defects.

Transmission jerks and shutters at low speeds on acceleration 0-20 mph. Vehicle has low milage 25518 at which time the dealer re-flashed the software on july 29th 2026.The vehicle was fine for two months , then on October 3rd the problem came back on October 3rd 2026 hesitating like a premature upshift from 1st to 2nd gear at 5 mph with a shutter. The current mileage is 28000 on the vehicle and the problem is intermittent.

My 2021 Toyota Highlander is experiencing the exact bumper/under-cover detachment detailed in NHTSA Recall 23V720. In August 2025, an authorized dealer performed the interim 23TA12 clip remedy. That remedy has completely failed. The lower bumper and engine splash shields are unzipping and actively dragging on the ground, creating a severe road hazard. Fred Haas Toyota World on I-45N and Toyota Brand Engagement are both refusing to inspect this failed safety remedy unless I pay an out-of-pocket diagnostic fee. This is a direct violation of the National Traffic and Motor Vehicle Safety Act, which mandates all recall diagnostics and remedies be free.

Toyota issued a safety bulletin in reference the issue with front carrier assembly pinion shaft in the UA80E and UA80F transmissions. They know there is an issue with the transmission and have known since 2/9/2021 when the vehicles were manufactured. But refuse to issue a recall. Toyota Safety Bulletin Ref # T-SB-0008-21

I own a 2021 Toyota Highlander Platinum AWD equipped with the 3\.5L V6 and approximately 77,000 miles\. The vehicle developed a humming/whining, airplane\-like noise from the front drivetrain while accelerating\. The noise increases with vehicle speed and stops when the accelerator is released\. There is no vibration, and the vehicle makes the same noise while traveling straight\. I took the vehicle to an authorized Toyota dealer, Kerry Toyota, and the dealer diagnosed the transmission as the source of the noise and recommended replacement of the transmission\. The quoted replacement cost is approximately $7,600 plus tax\. Toyota previously issued Technical Service Bulletin T\-SB\-0008\-21 concerning a whine or grind from certain 2021 Highlander UA80 transmissions and identifying the front carrier assembly pinion shafts as a potential cause\. My vehicle is approximately 17,000 miles beyond Toyota’s 60,000\-mile powertrain warranty\. I contacted Toyota requesting goodwill assistance with the transmission replacement, and Toyota declined assistance\. I believe there may be many similar cases involving 2021 Toyota Highlanders equipped with the UA80 transmission, including vehicles experiencing comparable whining or grinding noises and premature transmission\-related failures\. I am reporting this because an internal transmission problem that develops shortly beyond the powertrain warranty may worsen and could potentially result in loss of vehicle propulsion\. I believe NHTSA sho

The transmission has failed. Per review of available documents, this is a very common issue with this and other Toyotas.

Beep alert went off first then on dash board it notified me not to press on gas pedal & sensory collision 2. Parked the car for three days after the 3 days when starting the car the beep notification was still there on dash board still same notification. Then my neighbor came looked at it and said the all Toyota have same issue with the AC. He advised me not to turn the AC on just use fan. He said that when AC is on part of the car where the air blow is freezing. Now it is concerning when winter comes to turn on the heater.

Apple CarPlay: The touchscreen occasionally loses connection or fails to pair with Apple CarPlay and Android. I changed my chargers so many times thinking it was wire issue.

Head lights for newer vehicles are coming very bright and are pointing higher than normal safety levels causing on coming traffic feels like these lights are on high beam, which causes blinding issues for on coming traffic.

I bought a vehicle in cash three weeks ago at Universal Toyota located at [XXX] . Two days later, I called the sellers [XXX] and [XXX] to have a noise fix /checked. It turns out the transmission is bad/damaged and of course it's not safe to drive. Universal Toyota don’t want to fix it (expensive) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Toyota refuses to issue a recall for a well known issue with the UA80 transmission that fails around 5 years on many Highlanders. I follow [XXX] and there are countless posts about this issue. Mine failed at one month before my warranty was up and replacement was covered but it was replaced with the same transmission which I assume will also fail after 5 years or another 50,000 miles. There is a service bulletin for repair from Toyota so they're half admitting the issue but there needs to be a recall and a revision to the UA80 transmission to make them safer. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Transmission developed a whine at 61k miles. Needed to be replaced.

In my Toyota Highlander 2021 XLE model ,on 9/18 I hear a whinning noise when gas pedals is pressed. Took it to the Toyota TriCounty dealer in Limrick,PA for diagnosis. It was reported it is due to a transmission issue and it would cost around 10,600$ to repair. I haave been taking this vechile to same dealer to servie for last 5 years and this problem did not surface. I was told the car can be driven but would the car would stop when the transmission actually fails. Opened a case

The contact owns a 2021 Toyota Highlander. While driving 20 MPH uphill, the messages "Engine Failure," "Brake Failure," and "Pull Over to A Safe Place, See Owner's Manual" were displayed, and several unknown warning lights illuminated. The contact turned off and restarted the vehicle, but the failure persisted. After a second restart, the message "See Dealer" was displayed with the check engine warning light illuminated. After a third restart, the vehicle was driving rough while the accelerator pedal was depressed. The vehicle was taken to the dealer. The manufacturer was notified of the failure by phone. The failure mileage was approximately 123,000.

Transmission Failure Yes TSB No Warning Lights

Tech: SCOTT RICHART test drove vehicle performed inspection. Noise hear is coming from transmission internally. condition present is similar to condition described in T-SB-0008-21 for whine noise from transmission. Transmission would need replaced to remedy the noise. Vehicle is out of warranty, DOFU is 04/14/21. Transmission is not in the serial number range described in the TSB. Transmission serial # is A3A21C08858. QUOTED $8574.50 TO REPLACE TRANSMISSION WITH REMANUFACTURED TOYOTA TRANSMISSION.

The contact owns a 2021 Toyota Highlander. The contact stated that while driving 22 MPH, there was an abnormal sound coming from the vehicle. The dealer was contacted by phone and made aware of the failure. The vehicle was taken to the dealer, where it was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The manufacturer was contacted by phone, and a case was filed. The contact was informed that the repair was not covered under recall. The failure mileage was approximately 58,000.

There is an unknown whine coming from the transmission when pressing on the throttle. It loud and high pitched.

Leadcar Toyota LaCrosse WI has diagnosed and reported that the transmission needs to be replaced. Pertains to Service Bulletin T-SB-0008-21 the pinion shaft bearing defect. The major powertrain component is failing prematurely. Cost to repair is over $9,000 as it is out of warranty. We purchased the vehicle at 67,550 miles on 3/29/2025. Since we never owned a Toyota before we thought the whining of the transmission was unique to that vehicle. Once we heard about the service bulletin we took it in to get diagnosed.

Transmission has failed. Toyota states: Toyota Technical Service Bulletin T-SB-0008-21 addresses a whining or grinding noise in select 2021 Toyota vehicles equipped with UA80E orUA80F automatic transmissions caused by a defect in the front carrier assembly pinion shafts. Yes it can be available for inspection. This can be repaired with a $12,000 new transmission. * Sudden loss of acceleration: You may press the gas and the vehicle doesn’t accelerate normally. This is particularly dangerous when merging onto a highway, crossing an intersection, or passing. How this toyota highlander is putting safety at risk: * Unexpected shifting or jerking: A failing transmission can slam into gear, hesitate, or shift unpredictably, potentially causing loss of control. * Loss of drive: The transmission may suddenly stop transferring power to the wheels. You could be unable to move forward even though the engine is running. * Getting stuck in a gear: If it goes into a “limp” or failsafe mode, the vehicle may be restricted to a single gear and have very limited acceleration. * Loss of power while already moving: If the transmission disengages unexpectedly, you can lose the ability to accelerate out of a dangerous situation. * Difficulty maintaining speed: On a highway or uphill, a failing transmission may suddenly stop providing adequate power. * Transmission fluid leaks: A significant leak can cause the transmission to lose lubrication and worsen rapidly. Depending on where fluid goes, it can

Transmission failure at 80,000 miles

The 8 speed automatic transmission (UA80E) in my 2021 Toyota Highlander Limited V6 FWD failed at 75,491 miles. The failure presented as a loud whining noise during acceleration between 30 and 40 mph. A Toyota dealership diagnosed complete transmission failure requiring full replacement of the transaxle assembly at a cost of $8,144.45 (repair order dated August 14, 2026). The dealership service manager confirmed in writing that the failure appears consistent with Toyota TSB T-SB-0008-21, issued February 9, 2021, which documented whine and grind failures of the front carrier assembly pinion shafts in this transmission family. My transmission was built in June 2021, after the serial range covered by that bulletin, and failed the same way, indicating the defect was not confined to the bulletin's production range. This transmission is the subject of multiple pending federal class action lawsuits alleging premature failure. A transmission failure of this type can result in sudden loss of power while driving, which is a safety hazard. The vehicle was purchased new from a Toyota dealership in July 2021, was maintained normally, and was never used under severe service conditions. The problem has been confirmed by the dealer. The vehicle and failed component are available for inspection and the vehicle remains at the dealership.

**Component/System:** Automatic Transmission — 8-speed (UA80E/UA80F), Toyota Highlander **Description of the problem:** My 2021 Toyota Highlander (approximately 116,000 miles) has developed a high-pitched whining noise a while ago, that occurs during acceleration, consistent with the symptom described in Toyota's own Technical Service Bulletin T-SB-0008-21 (issued Feb 9, 2021) for whine/grind noise in the transmission on this model. The vehicle has not yet been formally diagnosed by a dealer or independent shop as of this filing; I am submitting this report proactively given the volume of documented failures in this transmission platform and to add to NHTSA's record before the condition potentially worsens. I am aware, through Toyota's own TSB and multiple pending class-action lawsuits (including Pallaya v. Toyota Motor Sales U.S.A., Case No. 2:25-cv-10613, C.D. Cal., and LeBoutheller v. Toyota, Case No. 4:25-cv-01389, E.D. Tex.), that this transmission (UA80E/UA80F, used in 2017-present Highlander and related Toyota/Lexus models) has a documented pattern of premature failure nationwide, often presenting first as this same whining noise, and in a number of owner-reported cases progressing to sudden power loss, shifting into neutral, or stalling — creating a serious safety risk to occupants and other drivers, particularly at highway speeds.

On August 24, 2026, my vehicle was parked, turned off, and locked for more than 6 hours in a parking lot. Without warning, the vehicle experienced a spontaneous thermal event/self combustion. The fire and thermal damage were entirely localized to the dashboard area inside the passenger cabin. The engine compartment, battery area and front mechanical components remained completely unaffected by the fire. The vehicle was off, motor was cold and car was closed and parked for about 6 hours when this incident occurred.

At 57,000 miles the dealership says the transmission must be replaced. Toyota refused to replace it under warranty because they stated it wasn't serviced at Toyota consistently. There isnt a service for the transmission under 100k miles. This is a known issue with this transmission and they act oblivious to this issue.

1. The car makes a squeaky sound when I accelerate. The faster I go the louder the noise becomes. I took the car to the Toyota dealership and was told that the transmission needs to be replaced. The car is only 5 years old. I checked online and noticed a lot of other people are also complaining about the same issue with their 2021 Toyota Highlander. 2. While driving on the Turnpike a few months ago, the driver side front door suddenly popped open on me. I had to hold it with my left hand, switched lane to pull safely to the shoulder lane in order to close it. The door was completely closed prior to this incident. When that happened, I was already driving on the road for over 1 hour. There was no previous signal that it was opened. It just popped open out of nowhere.

While driving and applying the brakes to come to a complete stop at low speed (approximately 5–15 mph), the vehicle intermittently loses brake responsiveness for a brief moment during the transition from regenerative braking to hydraulic (friction) braking. This causes the vehicle to lurch forward unexpectedly before the brakes fully re-engage. The issue is intermittent and unpredictable, occurring most often when coming to a stop at slow speed, which makes it difficult to anticipate and compensate for. This has happened more than a few times now, most latest, On XXX, this occurred while approaching a stop at traffic light and it felt that the vehicle nearly made contact with the vehicle ahead of me. I brought the vehicle to Elgin Toyota in [XXX] , in 2025 to report this issue. The service department test drove the vehicle but was unable to reproduce the symptom and did not perform any repair. I have since learned that Toyota issued Technical Service Bulletin T-SB-0059-23, "Hybrid Regenerative Brake Transition Feeling Improvement," dated XXX, which describes this exact symptom in 2020–2022 Toyota Highlander and Highlander Hybrid vehicles. I am filing this report because I believe this is a safety-related braking defect, particularly at low-speed stops, that creates a real risk of a rear-end collision. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The transmission whining started 70,000 miles and it is progressively gotten worse, there has been some sudden shifting at times. The manufacturer has known about this 8 speed transmission. Problem since 2017 and they haven’t done anything to improve it. Isn’t is something that the warranty only covers the drivetrain and. Transmission till 60,000. And know they are telling us that we have to pay anywhere from $7,000-$12,000 to,have it replaced. We have taken it to the Toyota dealership Thayer Toyota in bowling green,oh and they checked it out. And said that the front part of the transmission is ok it’s but the rear differential is the one that is going bad. We are hoping that there will an investigation on this UA80 transmission to see how many of the toyota models that have this transmission in it, have been reported and if any after the 60,000mile they have covered to be repaired at there cost. We understand that there is a CLASS ACTION LAWSUIT against this transmission. We would appreciate any help that you can get us. We can be contacted at [XXX] or phone number [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Toyota has known that the UA80 transmissions are faulty & they have not issued a recall. Mine failed at 60,500 miles just outside of the warranty period. I paid over $5,000 to have it replaced & the dealer confirmed that it required replacement due to a faulty transmission assembly. Toyota refuses to issue a recall or cover full costs for replacement.

The car's transmission is failing. •The "Whine of Death": The most common early warning sign is a high-pitched, airplane-like whining noise that rises in pitch with vehicle speed/engine RPM, especially once the transmission reaches operating temperature. •Technical Service Bulletins (TSBs): Toyota has issued internal bulletins (such as T-SB-0008-21 and related updates) addressing abnormal transmission noises and replacement protocols for affected V6 models. •No Formal Safety Recall (as of mid-2026): While the issue has spurred class-action lawsuits and high NHTSA complaint volumes, there has not been a mandatory safety recall for widespread replacement, leaving post-warranty owners to rely on goodwill assistance or third-party warranties.

It's about the problem with the automatic transmission UA80 already has the buzz That many customers are complaining sometimes it has jerks too.

At 66,000 miles the transmission on my 2021 toyota highlander is failing. This is a known issue with these transmissions and toyota is actively working against people to help get the parts replaced at their cost.

Lift gate does not open. Hydraulic struts have failed and the lift gate will only open with significant manual effort. This means that the rear door cannot be opened from inside the car.

My system information warning signal and chime indicates that an unbuckled passenger is present in my front passenger seat when nobody is there. Additionally, buckling the seat belt does not turn off the signal and chime. The sporadic signal and chime can continue for a very long time before eventually stopping. However, after another 30 seconds or so, it can start again. This cycle can continue for over an hour. It tends to occur more frequently above 35mph, but can also occur under that speed. From my research, this problem appears similar to another recall (Recall #23TA15 / Campaign 23V-865000), however my VIN currently isn't included in that recall.

Bought my 2021 Toyota Highlander XLE AWD 3 years ago due to supposed safety and reliability. Transmission went out right after warranty at 64,000 miles. Was not made aware that this is a common issue. Vehicle hard shifted and suddenly lost power when driving home with my 4 year old while making a left turn, and we were almost hit by oncoming traffic. Have not had prior issues in the past to suspect this would happen, so it was very sudden and unexpected. There has been no recalls or awareness for this which could have seriously injured my child and I. Went to take it to the closest mechanic right away to troubleshoot since the vehicle was not throwing any codes.

I made my last payment on my Toyota in June and the week I made my payment my mechanic confirmed a whining that had just started to be a transmission failure. After taking to another specialty transmission shop my transmission is failing. The internal bearings are failing just like the recall in other 2021 models. I’ve been told my VIN isn’t part of the recall but it is the same problem. I am having to pay $8500 on a transmission for a just paid off Toyota. I was so excited to be debt free. This is unacceptable. A Toyota transmission should not fail the minute it’s paid off. I’m very disappointed in Toyota. I contacted the dealership and the warranty help team to try to get part or all paid for and got nowhere. My car needs to be included in the recall of Highlanders with the internal bearing failure.

At around 75000 miles (less than 5 year old vehicle) the transmission exhibited a noticeable whine. After further research I presented the vehicle to the local Toyota dealer service department. An active technical service bulletin T-SB-0008-21 that describes a manufacturing defect with the front carrier assembly pinion shaft (essentially a catastrophic transmission failure) was matched to the symptom the vehicle was exhibiting. Further, my transmission serial number is directly within the affected production defect list. Failure to replace this transmission at significant cost (should not normally be routine maintenance on a highway driven vehicle at this age and mileage) could result in total loss of power and control causing the potential for a severe traffic hazard or accident.

This vehicle experienced transmission failure at 43,000 miles. There is a technical bulletin regarding a known manufacturer defect for this Make/Model/Year (TSB-008-21) and we were told by our Toyota service technician that our vehicle displayed all of the same symptoms as those identified in the technical bulletin. Unfortunately the serial number for our vehicle was not included in the bulletin and we were four months outside of the power train warranty, therefore Toyota refused to cover the costs of replacing the transmission. We are requesting that TSB-008-21 is reviewed and expanded to cover additional vehicles including ours that were affected by this manufacturer defect that caused both a safety risk as well as a financial hardship for our family.

The contact owns a 2021 Toyota Highlander. The contact received notification of NHTSA Campaign Number: 26V128000 (Seats). The contact stated that while the vehicle was parked, the contact attempted to lower the second-row seats, and the seat failed to lock into position and failed to recline as intended. The vehicle was taken to a dealer approximately five months later when a remedy became available, and the recall repair was attempted, but the dealer stated that the spring was replaced; however, the spring did not allow for the second-row seat to latch or lock securely. The manufacturer was not notified of the failure. The failure mileage was 58,900.

I had the dealer perform the repair described in Toyota Technical Service Bulletin T-SB-0059-23 (Hybrid Regenerative Brake Transition Feeling Improvement), which reprograms the brake actuator control module. Following this repair, the vehicle continues to exhibit the same lurching behavior at the same frequency as before the update. The TSB did not resolve the underlying condition. This is a safety concern because the unpredictable brake transition affects the driver’s ability to judge stopping distance and vehicle behavior in real time, particularly in traffic or on downgrades. The vehicle now has over 36,000 miles, placing it outside Toyota’s Basic Warranty; however, this is a safety issue that should be addressed by a recall. I am aware of numerous other Highlander Hybrid and Sienna Hybrid owners reporting the same defect, including reports that the same TSB reflash failed to resolve the issue for them as well.

This is a formal report of Recall Non-Compliance regarding Safety Recall 23V-720 (Toyota Recall 23TA12) on my 2021 Highlander Hybrid. An authorized dealership performed the recall on May 6, 2024, utilizing Op Code 23TA12R1 (Inspection & Install Fasteners). The dealership only addressed the lower bumper and failed to properly remedy the upper bumper retention tabs, stating it isn’t part of recall. The upper bumper cover has completely separated from the fenders during normal daily driving. The upper plastic mounting slots are torn out and clips will not hold. The dealership is refusing further repairs, instructing me to file a car insurance claim or pay a body shop myself to correct an un-remedied federal safety defect. The vehicle currently remains an active structural road hazard because the official recall remedy completely failed to secure the bumper assembly from detaching. A TAS case has been opened at the dealer, but federal intervention is requested to ensure recall compliance.