Owners filed 189 complaints about this vehicle with federal regulators, most often about the tires. It has been recalled 6 times.
When it fails
09000090,000 milesMedian miles at failure
84 complaints record an odometer reading. Failures cluster around 60,000–75,000 miles.
What fails
Component
Reports
Crashes
Fires
Injuries
Tires
17
0
0
3
Fuel System, Gasoline
12
0
0
0
Power Train › Driveline › Driveshaft
9
0
0
0
Fuel/Propulsion System
8
0
1
0
Vehicle Speed Control
7
0
0
0
Tires › Tread/Belt
7
1
0
0
Service Brakes, Hydraulic › Antilock/Traction Control/Electronic Limited Slip
7
2
0
0
Suspension › Rear
6
0
0
0
Suspension › Front
6
0
0
0
Visibility › Windshield Wiper/Washer › Linkages
5
0
0
0
6 safety recalls
Part 573 reports
Exterior Lighting › Headlights09E025000
Filed May 11, 200942,540 vehiclesDope, Inc.
Defect. DOPE, INC. IS RECALLING 42,540 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT." THESE LAMPS DO NOT CONTAIN THE REQUIRED AMBER SIDE REFLECTORS.
Risk. DECREASED LIGHTING VISIBILITY MAY RESULT IN A VEHICLE CRASH.
Remedy. DOPE, INC. WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT COMBINATION LAMPS. THE SAFETY RECALL BEGAN ON JULY 28, 2009. OWNERS MAY CONTACT DOPE, INC. AT 1-626-272-1798.
Exterior Lighting09E012000
Filed Apr 7, 200916,270 vehiclesSabersport
Defect. SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT." THESE LAMPS DO NOT CONTAIN THE REQUIRED AMBER SIDE REFLECTORS.
Risk. DECREASED LIGHTING VISIBILITY MAY RESULT IN A VEHICLE CRASH.
Remedy. SABERSPORT WILL NOTIFY OWNERS AND OFFER A FULL REFUND FOR THE NONCOMPLIANT COMBINATION LAMPS. THE SAFETY RECALL BEGAN ON MAY 11, 2009. OWNERS MAY CONTACT SABERSPORT AT 1-909-598-7589.
Exterior Lighting06E026000
Filed Mar 23, 200661,944 vehiclesPro-A Motors, Inc.
Defect. CERTAIN PRO-A MOTORS CORNER LAMPS, TURN SIGNALS, AND HEADLIGHTS SOLD AS REPLACEMENT LAMPS FOR USE ON CERTAIN PASSENGER VEHICLES LISTED ABOVE. SOME COMBINATION LAMPS THAT ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.
Risk. WITHOUT THE AMBER REFLECTORS, THE VEHICLE WILL BE POORLY ILLUMINATED, POSSIBLY RESULTING IN A VEHICLE CRASH WITHOUT WARNING.
Remedy. PRO-A MOTORS WILL NOTIFY OWNERS AND OFFER TO REPURCHASE THE LAMPS. THE RECALL BEGAN ON APRIL 3, 2006. OWNERS MAY CONTACT PRO-A MOTORS AT 323-838-2988.
Filed May 24, 2004586,196 vehiclesNissan North America, Inc.
Defect. ON CERTAIN PICKUP TRUCKS EQUIPPED WITH SIX CYLINDER ENGINES AND SPORT UTILITY VEHICLES EQUIPPED WITH FOUR OR SIX CYLINDER ENGINES, THE FUEL PUMP TERMINAL ON THE FUEL-SENDING UNIT CAN DEVELOP A CRACK IN THE PLASTIC MOLDING. THIS CAN CAUSE THE TERMINAL STRIP TO CORRODE UNDER SOME ENVIRONMENTAL CONDITIONS.
Risk. IF CORROSION OCCURS, THE TERMINAL STRIP COULD EVENTUALLY BREAK CAUSING THE FUEL PUMP TO STOP OPERATION. THIS WILL RESULT IN NOT BEING ABLE TO START THE ENGINE OR CAUSE THE ENGINE TO STOP RUNNING WITHOUT WARNING, WHICH CAN RESULT IN A CRASH.
Remedy. IN THE FOLLOWING STATES, DEALERS WILL REPLACE THE FUEL-SENDING UNIT. THESE STATES ARE CONNECTICUT, DELAWARE, ILLINOIS, INDIANA, IOWA, KENTUCKY, MAINE, MARYLAND, MASSACHUSETTS, MICHIGAN, MINNESOTA, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, TENNESSEE, VERMONT, VIRGINIA, WEST VIRGINIA, WISCONSIN, AND THE DISTRICT OF COLUMBIA. IN THE OTHER STATES, THE DEALER WILL INSPECT THE FUEL PUMP TERMINAL ON THE SENDING UNIT FOR CORROSION. IF CORROSION IS PRESENT, THE DEALER WILL REPLACE THE UNIT. IF THERE IS NOT CORROSION, THE DEALER WILL APPLY SEALANT TO THE TERMINAL HOUSING TO HELP PREVENT CORROSION IN THE FUTURE. OWNER NOTIFICATION BEGAN ON JUNE 28, 2004. OWNERS SHOULD CONTACT NISSAN AT 1-800-647-7261.
Power Train › Automatic Transmission00V288000
Filed Oct 2, 200076,652 vehiclesNissan North America, Inc.
Defect. VEHICLE DESCRIPTION: PICKUP TRUCKS AND SPORT UTILITY VEHICLES EQUIPPED WITH AUTOMATIC TRANSMISSIONS FAIL TO COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 102, "TRANSMISSION SHIFT LEVER SEQUENCE, STARTER INTERLOCK, AND TRANSMISSION BRAKING EFFECT. " THESE VEHICLES COULD HAVE A SHIFT CABLE LOCK PLATE THAT IS TOO BRITTLE AND CAN BREAK. THE GEAR SHIFT LEVER AND THE "PRNDL" INDICATOR MAY MOVE, BUT THE TRANSMISSION WILL NOT SHIFT OUT OF THE PARK POSITION. OVER A PERIOD OF TIME, THE TRANSMISSION COULD SHIFT OUT OF THE PARK POSITION, BUT THE GEAR INDICATED ON THE DISPLAY MAY DIFFER FROM THE GEAR ENGAGED IN THE TRANSMISSION.
Risk. IF THE DRIVER SELECTS 'DRIVE' AND THE TRANSMISSION IS ACTUALLY IN 'REVERSE', A VEHICLE CRASH COULD OCCUR.
Remedy. DEALERS WILL REPLACE THE AUTOMATIC TRANSMISSION SHIFT CABLE LOCK PLATE.
Exterior Lighting › Tail Lights99V347002
Filed Dec 20, 199967,000 vehiclesNissan North America, Inc.
Defect. VEHICLE DESCRIPTION: MINIVANS AND LIGHT DUTY TRUCKS. THE TAIL LIGHT SOCKET MAY HAVE BEEN IMPROPERLY MOLDED, RESULTING IN THE LOCKING TAB HAVING INSUFFICIENT FORCE TO RETAIN THE BULB.
Risk. IF THE BULB FALLS OUT OF THE SOCKET, THE BRAKE OR TAIL LAMP FUNCTION CANNOT OCCUR.
Remedy. DEALERS WILL REPLACE THE TAIL LAMP SOCKETS.
What owners reported
Newest filings
Fuel System, Gasoline
Filed Feb 23, 2026CA
The contact owns a 2000 Nissan Frontier. The contact received notification of NHTSA Campaign Number: 04V230000 (FUEL SYSTEM, GASOLINE); however, the part to do the recall repair was not available. The contact was unable to register the vehicle with an open recall. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure.
Fuel System, Gasoline
Filed Dec 29, 2025CA
The contact owns a 2000 Nissan Frontier. The contact stated that the vehicle was purchased 7 months ago. The contact stated that upon attempting to register the vehicle and to secure the license plates, the State DMV informed the contact that there was an open recall on the vehicle that needed to be completed prior to the registration. The contact was made aware of NHTSA Campaign Number: 04V230000 (Fuel System, Gasoline). The contact had called several dealers, who advised that the parts were not available and would need to be located. The contact had not been able to drive the vehicle due to the unrepaired recall. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not informed of the issue. The contact stated that the vehicle had not experienced a failure.
Engine
Filed Aug 25, 2025OK
From my Internet search using Google Gemini, (and Google AI has a disclaimer it can make errors), I have replaced my distributer on my 2000 Nissan Frontier three times now due to a stalling problem I have experienced on hot days. My 2000 Nissan Frontier is VIN [XXX] . Let's see how much Gemini info I can paste here: "The distributor on your KA24DE engine contains the camshaft position sensor, which is a critical component for engine timing. The distributor itself can fail for a number of reasons, including: Internal bearing failure: The bearing that the distributor shaft spins on can fail, causing the shaft to wobble or seize up. This disrupts the signal from the camshaft position sensor. Failed or failing camshaft position sensor: The sensor itself can fail due to age, heat, or internal electrical issues. Ignition coil failure: The ignition coil is often integrated into the distributor housing on this engine. As it heats up, it can fail and lose spark, causing the engine to stall. The reason this issue is often related to hot weather or a hot engine is that the heat can cause the internal components of the distributor to expand and fail, and it can also cause the ignition coil to break down more easily. Symptoms of Distributor Failure The symptoms for a failing distributor on the 2.4L are very similar to those of the V6 engine: Stalling, especially when hot: This is the most common symptom. The engine may run perfectly when cold, but after it has been running for a while and
Visibility/Wiper
Filed Mar 3, 2025SC
I was driving home or not and it was raining. I turned the windshield wipers on. They were working to begin with but after a few minutes, they just quit working altogether. You could hear the motor running for the wiper, but they just wasn’t moving so I had to see it on the side of the road to it. Quit raining so I could make it home. and couldn’t find the part to fix the windshield wipers so my boyfriend has rigged it to where it would work
Fuel/Propulsion System
Filed Apr 2, 2023OK
Unknown
Exterior Lighting
Filed Feb 28, 2022168,000 milesAK
The contact owns a 2000 Nissan Frontier. The contact stated that while driving at various speeds, the rear taillight bulb would eject from the retaining clip inside the socket of the taillight assembly. She became aware of the failure after purchasing replacement bulbs for what she thought were blown bulbs. After several failures, the vehicle was taken to an independent mechanic who physically held the bulb in place inside the assembly. After letting go of the bulb, the failure recurred. The local dealer and manufacturer were contacted and informed of the failure. The manufacturer notified the contact of NHTSA Campaign Number: 99V347002 (Exterior Lighting) however, the VIN was not included. The contact was then referred to NHTSA for assistance. The approximate failure mileage was 168,000.
Air Bags
Filed Mar 30, 2021272,000 milesTN
PASSENGER AIRBAG WILL NOT TURN ON WITH FACTORY KEY.
Tires
Filed Nov 9, 2020179,065 milesFL
WENT TO MY LOCAL GARAGE TO GET MY TIRES BALANCED. MECHANIC REPORTED THAT 1 OF THE 4 TIRES (ALL BOUGHT TOGETHER) WAS BEGINNING TO COME APART INTERNALLY / BELT SEPARATION. THE TIRES WERE INSTALLED DURING OCTOBER OF 2019. THEY HAVE LESS THAN 8000 MILES ON THE TIRES. VENDOR IS REIMBURSING ME FOR THE ONE TIRE THAT WAS FOUND TO HAVE THE DEFECT. THANKFULLY THIS WAS CAUGHT EARLY, BUT AM VERY CONCERNED AS THE OTHER 3 TIRES HAVE THE SAME DOT NUMBER.
Fuel/Propulsion SystemFire
Filed Nov 5, 201915,000 milesCA
BREAK LIGHT SHOCKER BRITTLE
Seat Belts
Filed Apr 15, 2019186,000 milesCA
WENT INTO DEALER TO CHANGE PASSENGER SEAT BELT UNDER LIFE TIME WARRANTY. DEALER SAID PASSENGER SEAT BELT WAS BAD. DRIVER SEAT BELT WAS REPLACED LIFE TIME UNDER WARRANTY 5 MONTHS BEFORE. THEY SAID PART SEATBELT PASSENGER WAS NO LONGER IN PRODUCTION AND TO CALL NISSAN. I CALLED NISSAN AND WAS GIVEN A CASE NUMBER. THEY TOLD ME THEY WERE SEARCHING FOR THE PART. WEEKS GO BY WITH NO OFFICIAL UPDATE BUT THEY CHANGED THE REPS 2 TIMES. THE LAST NISSAN REPRESENTATIVE [XXX] CONTACTED ME APRIL 15TH SAYING THEY COULD NOT FIND THE PART AND WOULD PAY $800 FOR THE TRUCKS BACK. I QUESTIONED ON WHY THEY WOULD STOP PRODUCING A LIFETIME WARRANTY SAFETY DEVICE PASSENGER SEAT BELT WHEN IT CLEARLY COULD BE A DANGER TO RIDER IN THE PASSENGER SEAT. NISSAN HAD PICTURES OF THE TRUCK AND HOW GREAT OF CONDITION IT IS. I TOLD THEM I JUST WANTED A SEAT BELT FIXED UNDER THE LIFE TIME WARRANTY NOT TO GIVE AWAY MY TRUCK FOR $800 WHEN WHICH HAS LINE-X, NAV AND TOW FOR WORK. I ASKED [XXX] HOW DOES THAT HELP ME? SHE SAID THAT WAS KELLY BLUE BOOK WAS $800. WHEN I LOOKED IT WAS $4K NOT $800. I ASKED WHY THE SEAT BELT MECHANISM CAN'T BE FIXED. SHE SAID THAT "I" WOULD HAVE TO FIND A DEALER TO DO THAT. WOULD NOT ANSWER MY QUESTION ON GETTING 2ND OPTION. ANY QUESTION AFTER SHE WOULD NOT ANSWER. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TT
Power Train
Filed Oct 15, 2018253,640 milesFL
TL* THE CONTACT OWNS A 2000 NISSAN FRONTIER. WHILE THE VEHICLE WAS IN PARK, THE CONTACT ATTEMPTED TO REVERSE AND THE GEAR STALLED WITHOUT WARNING. THE CONTACT TOOK THE VEHICLE TO AN INDEPENDENT MECHANIC WHERE IT WAS DIAGNOSED THAT THE SHIFTER FAILED. THE DEALER (AUTOSTAR NISSAN OF BOONE, 135 INNOVATION DR, BOONE, NC 28607, (828)-264-7726) WAS CONTACTED TO HAVE THE VEHICLE DIAGNOSED AGAIN. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND STATED THAT THERE WERE NO RECALLS. THE CONTACT WAS ADVISED TO FILE A COMPLAINT WITH NHTSA. THE FAILURE MILEAGE WAS 253,640.
Unknown or Other
Filed Aug 4, 2017CA
ALL I KNOW THERE IS A RECALL ON THE TRUCK FOR THE FEEL SYSTEM I'M JUST TRYING TO PAY FOR THE TAGS.
Fuel System, Gasoline
Filed Oct 17, 201686,250 milesNJ
TL* THE CONTACT OWNS A 2000 NISSAN FRONTIER. THE CONTACT STATED THAT FUEL LEAKED FROM THE FUEL TANK. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE FUEL TANK AND PUMP NEEDED TO BE REPLACED DUE TO RUST. THE VEHICLE WAS REPAIRED. THE FAILURE RECURRED. THE VEHICLE WAS TAKEN BACK TO THE DEALER WHERE THE TECHNICIAN INFORMED THE CONTACT THAT THE FAILURE WAS RELATED TO NHTSA CAMPAIGN NUMBER: 04V230000 (FUEL SYSTEM, GASOLINE); HOWEVER, THE VIN WAS NOT INCLUDED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 86,250. UPDATED 01/10/17*LJ *TR
Fuel System, Gasoline
Filed Sep 7, 2016135,000 milesVT
TL* THE CONTACT OWNS A 2000 NISSAN FRONTIER. THE CONTACT STATED THAT THE OIL PAN AND FUEL TANK FAILED DUE TO CORROSION. THE CHECK ENGINE WARNING INDICATOR ILLUMINATED. THE CONTACT ALSO OBSERVED AN ABNORMAL ODOR OF FUEL NEAR THE VEHICLE. THE VEHICLE WAS DIAGNOSED BY A DEALER WHERE IT WAS DETERMINED THAT THE PARTS NEEDED TO BE REPLACED. THE OIL PAN WAS REPLACED, BUT THE FUEL TANK WAS NOT REPLACED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT THAT IT WOULD BE AN OUT OF POCKET EXPENSE TO REPLACE THE FUEL TANK. THE FAILURE MILEAGE WAS APPROXIMATELY 135,000. UPDATED 10/18/16*LJ UPDATED 10/19/16.*JB
Tires
Filed Aug 4, 2015107,183 milesCA
TL* THE CONTACT OWNS A 2000 NISSAN FRONTIER EQUIPPED WITH FIRESTONE PRIMEWELL TIRES, SIZE: 215/65/R15. WHILE DRIVING APPROXIMATELY 65 MPH, THE CONTACT FELT A VIBRATION IN THE TIRES. THE CONTACT DISCOVERED THAT THE SIDEWALL WAS SEPARATED FROM THE THREAD OF THE REAR PASSENGER SIDE TIRE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THE TECHNICIAN STATED THAT THE TIRE NEEDED TO BE REPLACED. THE TIRE WAS REPLACED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE VEHICLE FAILURE MILEAGE WAS 107,183 AND THE TIRE FAILURE MILEAGE WAS 319. MA 10/19/15
Fuel/Propulsion System
Filed Feb 11, 2015200,000 milesNJ
TRUCK STARTED TO BUCK AND HESITATE DURING ACCELERATION. CHECK ENGINE LIGHT CAME ON. TOOK TRUCK TO NISSAN DEALER AND WAS INFORMED THE FUEL TAKE SENDING WAS BAD. SEARCHED ON LINE FOR RECALLS AND FOUND A RECALL FOR MY TRUCK DUE TO DEFECTIVE FUEL SENDING UNIT. NISSAN IS REFUSING TO HONOR THE RECALL BECAUSE IN 2010 THEY REPLACED THE FUEL TANK. I STATED THE FUEL TANK IS NOT THE FUEL TAKE SENDING UNIT WHICH WAS NOT REPLACED AT THAT TIME. DEALER CHARGED $850.00 FOR REPAIRS AND NISSAN WILL NOT HONOR THE RECALL ON THE FUEL SENDING UNIT. THE RECALL STATED THIS IS A SAFETY RECALL DUE TO THE FAILURE OF THIS UNIT COULD CAUSE A CRASH. *TR
Fuel/Propulsion System
Filed Oct 11, 2014134,164 milesNH
CORROSION WAS DISCOVERED AT THE TOP OF THE GAS TANK AFTER A STRONG GASOLINE ODOR WAS NOTICED. *TR
Fuel/Propulsion System
Filed Sep 29, 2014123,600 milesNY
I NOTICED A FUEL ODOR FOR ABOUT 2 DAYS AND THEN MY CHECK ENGINE LIGHT CAME ON. I WENT TO MY LOCAL NISSAN DEALERSHIP ON 9/26/2014 AND WAS TOLD THAT MY FUEL PUMP IS NOT SEALING PROPERLY ON TOP OF MY FUEL TANK DUE TO RUST. I WAS INFORMED THAT THE TANK NEEDS TO BE REPLACED AND THE COST WOULD BE $954 DOLLARS. THIS IS THE SECOND TIME I HAVE HAD THIS PROBLEM. THIS SAME PROBLEM OCCURRED IN MAY 2009. I HAD THE SAME FUEL ODOR ISSUE. THEY DROPPED THE TANK,CLEANED UP THE RUST, RESEALED THE FUEL PUMP, AND RE-INSTALLED THE TANK. AT THE TIME IT COST ME $594 DOLLARS. I HAVE THE RECEIPTS FOR BOTH ISSUES. AT THE TIME NISSAN CORPORATE STATED THAT THEY WOULD NOT PAY FOR THE ISSUE. THIS IS A RECURRING PROBLEM FOR ME AND I READ UNDER THE "COMPLAINTS" SECTION FOR THIS VEHICLE THAT OTHER PEOPLE HAVE HAD THIS SAME PROBLEM. THIS IS BOTH A TANK DEFECT AND MORE IMPORTANTLY A SAFETY ISSUE. *TR
Tires
Filed Jul 16, 2014289,889 milesNC
TOYO TIRES BELT SEPARATION CAUSING TIRES TO BECOME MISHAP AND CAUSING VEHICLE TO WOBBLE, AND RIDE ROUGH. *TR
Fuel/Propulsion System
Filed Nov 14, 201382,000 milesNY
PREVIOUSLY I REPORTED A FUEL TANK LEAK. I HAVE SEEN THAT OTHER 2000 / 01 FRONTIERS HAD THE SAME ISSUE. NISSAN RECALLED THE 2001"S AND REPLACED THE FUEL TANK. THEY WERE REPLACING THE TANKS ON THE 2000 MODEL AT NO CHARGE ON A CASE BY CASE BASIS. I FILED A CASE WITH NISSAN ( CASE#12472021) SEEKING ASSISTANCE AND TODAY WAS DENIED ANY ASSISTANCE IN HAVING THE DEFECTIVE TANK CHANGED. THE NISSAN SUPERVISOR WAS [XXX] AT 800 343 6913 EXT [XXX] THAT WAS AFTER I PAID A NON-REFUNDABLE DIAGNOSTIC FEE OF $120.00 TO NISSAN 112 IN PATCHOGUE NY TO TELL ME THE TANK NEEDED TO BE CHANGED AT A COST OF OVER $700.00. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
No unusual pattern of severe incidents in the complaint record.
Complaint counts track how many cars were sold and how long they have been on the road as much as they track quality. A common model from 2013 has had a decade to accumulate reports; a rare one from last year has not. The signal worth weighing is in the severity columns, in whether the same component keeps appearing, and in whether the manufacturer eventually opened a recall for it.
Recall repairs are free for as long as the recall stands. Check whether a specific car still has open work at NHTSA's VIN lookup.
Most recent recall on file: May 11, 2009. Source: NHTSA Office of Defects Investigation.