2018 Tesla Model 3 complaints

I have an active alert on the drive side safety restraint system. Alert code RCM_a021. I have noticed this appears to be a common problem. A recall should be issues as this a a safety issues and lives could be at stake.

I received a safety alert on my car screen: Front passenger safety restraint system issue. Service is required. The front passenger safety restraint system fault typically involves a malfunctioning occupant weight sensor in the passenger seat, which controls whether the airbag activates or deactivates EVGOER. This is a serious safety concern because the airbag may be disabled at that seat location in the event of a crash. The issue is often caused by loose, broken, or unplugged harnesses or connectors under the seat, particularly related to the Occupant Classification System (OCS) Tesla Owners OnlineDigital EV Doctor. Many owners report this happens because wires under the seat get crimped over time due to Tesla's "easy entry" feature that automatically moves seats. Since this a widespread Tesla Model 3 problem, I believe this should be a recall.

I am reporting a major safety defect that began immediately after Tesla installed the Full Self-Driving (FSD) hardware upgrade on my vehicle. After paying $2,000 for FSD and receiving the hardware retrofit, the car now instantly veers left toward oncoming traffic whenever FSD is engaged. This began immediately after Tesla’s installation. Before this service, my vehicle operated safely. I have contacted Tesla Cherry Hill Service Center in New Jersey multiple times. The advisors there repeatedly told me to “just recalibrate the cameras from the touchscreen.” I’ve done this numerous times, following every instruction carefully, but the issue persists. When I called the Service Center, I was told that “everything looks fine remotely,” even though the problem continues and is clearly dangerous. I was also told they could take it for a test drive, but that if they couldn’t find anything, I would have to “wait for a future update” to make FSD usable. This is unacceptable and unsafe. Tesla delivered this car to me in a dangerous condition that could easily cause a serious crash. A car that steers itself into oncoming traffic under FSD control should never have been returned to a customer — especially one new to using FSD. I should not be responsible for any repairs, recalibrations, or diagnostics related to a defect introduced by Tesla. This issue appears to be the direct result of improper installation, misalignment, or faulty calibration following the FSD hardware upgrade performed

The contact owns a 2018 Tesla Model 3. The contact stated that while driving at approximately 30 MPH through an intersection, another vehicle t-boned the driver's side from the driver's side front bumper to the rear passenger door. The contact stated that the air bags did not deploy as intended. Medical attention was needed after the contact sustained lower back, left shoulder, neck, tailbone, and internal bleeding injuries were sustained. A police report was filed. The vehicle was taken to a collision center, where it was currently pending an inspection. The manufacturer was not notified of the failure. The failure mileage was approximately 88,894.

I own a 2018 Tesla Model 3. The vehicle experienced a sudden loss of steering assist while driving, and the steering wheel became extremely difficult to turn, eventually locking up to the point where the vehicle could no longer be safely controlled. There were dashboard warnings related to steering and low-voltage system faults. The vehicle had to be towed because it was unsafe and not steerable. This is the second time within a few months that the vehicle has become inoperable and required a tow. The first failure involved a low-voltage electrical fault that prevented the car from charging or driving. The most recent failure involved the steering rack and a front-end controller component. Tesla diagnosed the issue as requiring replacement of the steering rack and a front controller assembly. The repair cost was quoted at approximately $4,200 out of pocket, and Tesla stated the failure was not covered under warranty and not related to the earlier electrical issue. No recall was listed for this VIN. There was no crash, but steering control was lost while the vehicle was in motion, which created a safety hazard. I am reporting this because a sudden loss of steering function while driving is a serious safety defect that could lead to a collision if it occurs at higher speeds or in traffic.

We noticed that one of our tires was leaning inwards and the alignment was completely shot. There was no event that caused this but just noticed it one day driving. After having to replace two new tires, we took it into the Tesla dealership and they found that the control arm and suspension as well as the frame underneath is broken. The car has a clean tittle and this problem use to be covered by Tesla but for some reason now is not and this is a big steering and safety issue! We should not be responsible for the cost to fix the car if this has happened so often in the past!

The contact owns a 2018 Tesla Model 3. The contact stated that while driving approximately 60 MPH, the vehicle became difficult to maneuver. No warning lights were illuminated. The vehicle was taken to a dealer, where it was diagnosed, and determined that the frame underneath the vehicle was fractured. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 89,700.

The rear doors do not have a manual release. If power is lost, you cannot open the rear doors. This is a severe safety concern. With 2 child seats in the rear seats, with a power failure, you cannot get the children out. Newer Model 3 vehicles, have a manual safety release. My 2018 does not.

Repeatedly and randomly, with cruise control (not FSD) engaged, the car would brake, sometimes aggressively. The last time, it braked so hard the tires or brakes squealed and the car swerved slightly before I was able to regain control. This was on the freeway (in Colorado, if I remember correctly) while I was cruising at 70 or 75 MPH. I decided that that was the last time I would use cruise control; it was just not safe. I had an appointment on October 22 to take the car in for service. But then a friend told me this was called "phantom braking" and that there was no fix. A friend suggested that I contact the NHTSA.

The front upper control arms on my 2018 Tesla Model 3 have failed multiple times, producing loud clunking, popping, and binding noises during steering. The issue has worsened and poses a serious risk of loss of control while driving. Tesla replaced these parts under goodwill in the past, but the failures have returned. The most recent incident occurred around 03/05/2025 at approximately 106,867 miles. The failure has been confirmed and documented by Tesla Service Centers, and I have multiple invoices showing repeated replacements of the same components. The problem directly affects steering and suspension safety.

Passenger restraint fault message randomly comes on.

The "Front passenger safety restraint system" is prone to errors because the wiring for it beneath the seat is prone to getting knocked loose and electrical interference

The center display (Vehicle Pad) on my 2018 Tesla Model 3 went completely blank while driving. This eliminated access to all vital driving information including the speedometer, gear selection, and safety indicators. Safety Concern: Without visible speed data and wipers the vehicle cannot be operated safely or legally. I attempted to reboot the system and power cycle the vehicle but the screen still failed.

The brake lines badly rusted creating safety hazard as Tesla service reported when working on other maintenance. Not a warranty issue not covered as repair is over $3800. Vehicle was not abused and was kept clean regularly - this seems to be a vehicle defect if the brake lines can get moisture trapped behind the battery pack and create excessive corrosion requiring brake line replacement.

No warning messages at all, all cameras/sensors stopped working all at once while driving, full self drive stopped working, lane assist, safety features of full self drive was degraded by this. Car software v12 (2024.44.25.2 288ce84bb43e), according to the dealership the computer fried randomly.

Driving a 2018 Tesla Model 3, driver seat shows message "Front left safety restraint system issue. Service is required". This occurs when the driver is in the seat with the seat belt fastened and the vehicle is in motion. This issue refers to the possible seat belt, seats and/or air bags failure. This is a threat for drivers as these are the front line of defence in case of any collisions or accidents. This issue has been reported by multiple Tesla car drivers and their posts are available on online forums. Message appears on the Tesla screen driven. Tesla does not cover this out of warranty. My appeal to NHSTA is this is hazardous to drivers and cars should be recalled and repairs should be covered.

The car's horn only works sometimes and often not at all when steering wheel horn areas are pressed, hard or soft!! Tesla said they couldn't fix it!!

Mold, mildew and smelly odors are coming through the on-cabin ventilation system. This is the 3rd time since 2020, I had to purchase & replace the two air filters and spray the poorly designed duct & condensation accumulation. I inspected the self-installed air filters and there were no signs of moisture, mildew, mold or stains on the filters, which makes me think the problem was /is from the HVAC condenser or coil area. Tesla had issued a 2019 software update to “run” the ventilation system longer after the vehicle was in “Park” but the software update has NOT solved the mildew and bacteria odors that are vented into the cabin, and subsequently changed the HVAC design in post 2021Tesla models that corrected this problem with many pre-2021 Model 3s. Tesla Service Centers are still charging for the coil spray cleaning and not covering this mold & bacteria-creating HVAC design problem of their earlier year vehicles ca as I had to pay Tesla for a pair of air filters change and now they want me to pay for a separate fee for spraying the condenser coils.

The contact owns a 2018 Tesla Model 3. The contact stated that when the vehicle was started, the GPS failed to function as intended. In addition, the “Unable to Charge” warning light was illuminated. The contact stated that the GPS provided incorrect directions. The contact attempted to recharge the battery; however, the battery failed to charge. The contact stated that the failure had occurred the following day after an over-the-air software update was performed. The dealer was made aware of the failure. The contact was informed that the battery needed to be replaced. The vehicle was not repaired. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. In addition, the contact referenced a document that stated that the battery life should last 200,000 to 300,000 miles. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 106,884.

The car's dashboard display shows an alert "Front Passenger Safety Restraint System Issue". This puts the front passenger at risk.

Front suspension creaking noise, took in for service, techs ultimately found the front subframe captive welded nuts that secure the front links had sheared off, requiring a replacement of the subframe and some other suspension components. Nuts, which were initially welded to the subframe during assembly, were loose on both sides. No associated damage or impact, normal use over 7 years of ownership. This is also a common issue, and is already associated with a very limited recall (21V-835) but for whatever reason, this failure is still occurring quite often in the wild - normally with far more extreme consequences than in my case.

I believe my car should be included in the recall for trunk harness recall. My alert and issue is the rear camera being off due to rear trunk ruining the wiring harness that has affected many cars. This is already a recall but I believe my car missed being involved.

My 2018 Tesla Model 3 began showing a "front passenger safety restraint fault" alert within the last week or so. I scheduled service and then received an estimate of almost $1000. When I corresponded with Tesla through their app, they told me the diagnostic code is: RCM_a056_passengerFrontOCS, indicating failure of the passenger Occupant Classification System (OCS). The OCS controls whether and how the airbag deploys; failure could prevent deployment or cause improper deployment in a crash, creating a serious safety risk. Tesla acknowledges the fault but told me the repair (replacing the OCS and passenger airbag) will not be covered since the car is out of warranty. Tesla has issued service bulletins (SB-19-20-003 R1, SB-23-20-002 R7) for known OCS issues, and many Model 3 owners have reported the same fault. This appears to be a widespread safety defect and should be investigated as a potential recall.

The first time the lower Lateral Links on the front right side just broke and luckily it didn't happen on the highway with passengers Right now I hear the same noises again coming from the driver's left side from the lower Lateral Links I am afraid that it will happen again and that’s really scary I drove many cars before and never felt so unsecured I don't understand how such a safety problem is not being addressed. I hear and read that other Tesla owners are also reporting the same problem.

While driving on the 5 freeway, using autopilot, my car suddenly decelerated and came to a complete stop. Fortunately, we were not struck from behind, and I was able to get the car to accelerate again after approximately 10 seconds.

The front passenger side upper control arm is squeaking and causing vehicle to drift to right, vehicle only has like 60k miles and the upper control arms have been replaced by Tesla before

The contact owns a 2018 Tesla Model 3. The contact stated that while driving 60 MPH with the Self Driving feature activated, the vehicle failed to slow down while approaching oncoming traffic. The vehicle accelerated and drove around the traffic. The contact depressed the brake pedal and touched the steering wheel to disable the Self Driving feature, but the vehicle failed to respond. The contact stated that once the vehicle passed through traffic, the brake pedal was depressed again, and the Self Driving feature was deactivated. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was 55,866.

Main incident: Time: 2025-08-28 ~12:41 PM PST What happened: After searching for a parking space, the driver was preparing to reverse into the spot, the driver pressed up the stalk to shift the gear into reverse, a sound was heard and something showed up on the screen, the vehicle once again started accelerating and running forward suddenly and sharply (3 mph to 28 mph in 3 secs), driver tried to steer the vehicle away from cars and buildings to minimize danger, the car rushed onto a concrete curb, hit one blue Tesla, then hit the side of a concrete utility pole, and ran over a plant and last crashed into the chain-link french before it finally stops Injuries: * Spine pain for one passenger Damages: ** All tires blown out, tire falls off ** Severe damages throughout the vehicle body * One Tesla parked on the parking lot was severely damaged * The utility pole's base box was scraped and deformed * One plant was knocked down Similar case 3 few mins ago: Time: 2025-08-28 ~12:38 PM PST What happened: The driver entered a oneway parking lot, but found no available spot and was trying to back up, the vehicle suddenly accelerated on its own. The driver performed an emergency brake and stopped the vehicle. At the time the vehicle stopped, it was only about 20 inches away from two cars in front of it Injuries and damages: None What component or system failed or malfunctioned, and is it available for inspection upon request? Malfunctioning of the electronic control or braking system le

All 4 Brake lines (tubes) from either from ABS or Brake booster pump are corroded and pierced. All brake fluid leaked front center of the vehicle and lost all brake. Brake lines or tubes are looks good from under the front and back tires. It looks like a quality of the brake lines / tubes from ABS to the bottom are not meeting the expected quality.

A sensor for the driver side safety restraint system was displayed from the vehicles screen. Potentially loose wires under the seat when manufactured.

This message has been intermittent and looking online has happened a lot for this model. The front passenger restraint system is critical for passenger safety, this should be a recall. Concern: Customer states:Alerts - Seats - Front passenger safety restraint system issue/Service is required Detected August 16, 2025

Getting a notification for "Front left safety restraint system fault" which disengages the airbags. Seems like a very common fault with Teslas but no recall has been made.

Too fast and too close to stop sign to red light or other cars while in Full Self Drive (supervised).I had to disable it to avoid risks of accident.Even using Chilly Mode.

Backup camera recall was not fixed properly or the new parts have same issue. As a result the backup camera was not functioning. When the camera is not functioning the autopilot system drives aggressively, speeding up to the max set speed when it is not safe to do so with current traffic conditions. Had to disengage autopilot otherwise it would have crashed. Also I received an alert that the emergency breaking system was not functional. When reversing could not use backup camera.

The contact owns a 2018 Tesla Model 3. The contact stated that while his wife was driving at slow speeds, after completing a right turn, there was an abnormal sound coming from the front passenger’s side suspension. The contact stated that increased effort was required to maneuver the vehicle. No warning lights were illuminated. The vehicle was towed to the dealer, who determined that the passenger’s side control arm had disconnected. The contact was informed that two bolts that secured the control arm to the frame were missing. The contact also stated that the bolts were found by the tow truck driver while loading the vehicle for towing. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 95,000.

The contact owns a 2018 Tesla Model 3. The contact stated that when the vehicle was started, the front passenger's side restraint warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed with a seat belt restraint failure. The contact was informed that the front passenger's side wiring harness needed to be replaced. The vehicle was not repaired. In addition, the contact stated that a year prior to the failure, the front driver's side restraint failed, and the vehicle was repaired. The contact stated that at that time, the front passenger's side restraint failure was intermittent; however, the repair for the front passenger's side restraint was not completed because the failure was not duplicated. The contact stated that only the driver's side wiring harness was replaced under warranty. The manufacturer was made aware of the failure but provided no assistance. The failure mileage was approximately 60,000.

Tesla failed to properly diagnose a high-voltage battery isolation fault in my 2018 Model 3. Despite safety-critical BMS_a027 and BMS_a142 faults indicating multiple isolation failures, they skipped required insulation resistance testing, falsely blamed sand in a connector, and charged me $174.95. After the issue returned, they reversed course, replaced an internal battery contactor, and reduced the $1,173 estimate to $356—admitting fault without owning it. Days later, a diagnostic showed dangerously low isolation resistance (380kΩ, far below Tesla's 1,000kΩ safety threshold), yet they took no further action. On July 12, the car again went into limp mode. Tesla’s repeated failure to follow safety protocols, diagnose accurately, and honor warranty obligations has left me with a vehicle in an unsafe state and no corporate accountability. I've contacted their Resolutions team three times (7/2, 7/7, 7/10) with zero response.

My Tesla got stuck in a McDonald's drive-through because the EPB (Electronic Park Break) refused to disengage. I believe it got stuck as the vehicle was pulling up to the window to pay and I had to reach out with my phone to tap their payment terminal to use Apple Pay. Then the park brake engaged I believe because I possibly lifted up from my seat, yet had my foot on the brake, but when I put it into drive, it refused to disengage. So my car got stuck for about an hour until we force skidded it out of the drive way. Now I've been stuck at this McDonald's parking lot for days, unable to drive it to get repaired or charged. Tesla Temecula refuses to schedule service and canceled the service appointment. Other further away Tesla Service Centers want to charge me hundreds of dollars for diagnosis that I don't have. This is the 2nd time the park break got stuck. The other time was in hospital ambulance ER drop-off bay. This is a major safety issue and the NHTSA should do a safety recall on this to force Tesla to fix it. It's both a software and hardware engineering issue. Yet Tesla keeps placing the blame and cost on customers to profit from their faulty engineering testing. Please help me and Tesla customer fix this!

An error code (RCM_a056) will intermittently come up and say there is a fault with the front passenger safety restraint system. It will turn on for a car ride and stay off for a few days and come back randomly. When I researched this code, I found that this is a known issue with 2018 Tesla Model 3's. Apparently there was a flaw in the airbag system which causes this safety concern. I contacted a Tesla service center and they said it would cost $300 just to check it out and another one said +$1000 to "fix". I called their customer service line explained that this should be covered for free since it is not due to "normal wear" but rather should be a safety recall. I also explained this to the service techs but they just said they can't do anything. If I would have been involved in an accident, my wife could have died because of this safety flaw. The vehicle is still under warranty until 120,000 miles. Thank you for your consideration on this matter.

My car started having loud noises and suspension on both side of my car started making noises and both control arms along with sway barrings and struts are gone bad.

RCM_a021 Front left safety restraint system fault error

Front suspension creaking & rattling going over bumps Tesla took days & days & never called me w/ problem I kept calling in!! Finally decide it is a KNOWN recall problem w/ Suspension bolts & sub frame! They told me they torqued them & would test drive for noise & I never heard from them! I had to call in. Suddenly I had a $4200 estimate for repairs including $322 1.24 hours of diagnosis??? A known problem other 2018 Tesla’s have been recalled for ??? Very suspicious?? How do I know they didn’t torque it too far & strip bolt themselves??

My brake lines began to leak. When I took the car to the Tesla Service center they repaired the brake lines, but in the process they found that the brake fluid had leaked in/on the battery compartment. Furthermore, they found a coolant leak that also leaked on/in the battery compartment. This cause a hole to develop into the battery compartment. Having the coolant and brake lines in a place that could affect the batteries is a significant design flaw of the Model 3. According to the technician from Tesla, my car/batteries, were a ticking time bomb and could have ignited at any point. I am very fortunate that a fire was not started with myself or my family in the car. I believe Tesla needs to make all Model 3 owners aware of this possibility and come up with a way to remedy this flaw before someone looses a life. If the brake lines on my car hadn't sprung a leak, I'm not sure I would have know about the coolant leak until it was too late.

This is a large scale problem with Tesla due to their "easy entry" which automatically moves the front seats to fit the drivers saved positions. Due to Tesla not properly securing the wires under the seat, they get crimped over time causing an error of "safety restraint system issue." There have been thousands of reported Teslas with a simple Google search. The service center also stated to me this is a large scale issue but a recall has not been issued. This is very dangerous as this disables the airbags due to a seat belt or wire crimp under the seat issue. Please investigate and issue a mandatory recall for the safety issue as Tesla wants $1000 to rectify the issue. Many have reported this issue to be fixed by the service center multiple times only to come back months later.

Vehicle is displaying an error message "Front passenger safety restraint system fault" and "front passenger safety restraint system fault. Service is required." This has the result of "The restraint system may not function as designed." According to an Internet search, this is a very common fault, caused by "interference" and necessitates an occupancy sensor, wiring harness and airbag module exchange.

The bolt/fastner holding the control arms almost backed all the way out. I was driving and heard metal sound it got worse on the drive home. I also noticed the alignment to get worse and when I got home I looked and the bolt/ fastner almost came out. There is a tesla recall for only a small percent for my year with that issue. Tesla wants 4k to replace it. It is a huge safety issue. I have a family and it could have been serious if it detached not only to me and my family but other vehicles other pedestrians.

Vehicle is displaying an error message "Front passenger safety restraint system fault" and "front passenger safety restraint system fault. Service is required." This has the result of "The restraint system may not function as designed." According to an Internet search, this is a very common fault, caused by "interference" and necessitates an occupancy sensor, wiring harness and airbag module exchange.

When seat is moved up for my [XXX] daughter, who is learning to drive, it now triggers an error an indicates the air bags will not work. The error code is RCM_a021. It seems the vehicle has a defect that over time the connections for the front seat harnesses will fail. This is a known issue with a Service Bulletin - SB-21-17-005 on your website from December 8, 2021. [XXX] Manufacturer has confirmed the issue, but refuses to replace it unless they are paid more than $800 (although, online people report that when they were under warranty the cost for parts and labor was in the $300 range). INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I just traded in my vehicle for a Tesla from 3rd party dealership on [XXX] A light came on once I reached my home. I called right away before the dealership closed but no one answered. So I took it upon myself to make a service call to Tesla to get my vehicle checked come to find out my vehicle has extensive damages from my unit drive, my subframe and the battery pack is severe punctures and needs to be replaced. Choice Automotive LLC in Honolulu Hawaii didn’t disclose anything to me before purchasing this vehicle. also they didn’t disclose that this vehicle was in a car accident, but they carried on with the sale. I have pictures of what needs to be repaired. Tesla said, I will need $20,000 to repair these damages. So I’m trying to take legal action against Choice Automotive LLC for selling me a vehicle that needs a lot of repair to drive normal again. I need them to pay for these repairs immediately. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I believe this is a safety issue that warrants a recall notice since the seat restraint system may not work correctly due to an electrical connection issue. I get an error message "Front left safety restraint system fault" that comes comes and goes depending on the position of the driver seat - if I raise the seat I get the fault message, if I lower the seat the message goes away. This is clearly due to a loose electrical connection in the seat restraint system. I removed the cover at the side of the seat and have identified a loose yellow/orange plastic connector to the left of the seat (see picture). When you jiggle that connector the error message goes on and off. Tesla will fix the issue for $650, but I believe this is a faulty design issue that causes the connector to get worn every time you adjust the seat, and it should be fixed by Tesla at no charge.