NHTSA
Defect investigations
NHTSA opens defect investigations when complaint patterns suggest a possible safety risk. Browse all 4,173 investigations, including 93 currently open.
According to the National Highway Traffic Safety Administration (NHTSA), the agency Office of Defects Investigation has opened 4,161 formal defect investigations into U.S. vehicles as of June 2026. Each investigation can precede a recall; see our methodology for how these federal case files are tracked.
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INADEQUATE CAP LUG NUTS
HEATER HOSE MISROUTING
HEADLIGHT RETAINING RING
PARKING BRAKE FAILURE
UNDERHOOD FIRES
Ford Ford
ROLLOVER PROPENSITY
UNDERHOOD FIRES
SEATBELT RETRACTOR JAMS
INJURES FINGERS
F-SERIES FUEL TANK FIRES
FAILS
SUDDEN ACCELERATION
STOP LAMPS
Chevrolet Chevrolet
SEAT ARM REST FAILURES
BRAKE INEFFECTIVENESS
FIRES
AIR BRAKE EMERGENCY VALVE
BRAKE LIGHT SWITCH
FRONT SEAT FAILURE
WIPERS
TRANSMISSION DOWNSHIFTING
DOOR HINGE PINS
POWER STEERING BRACKET
ELECTRONIC ACCEL
BRAKE LIGHT SWITCH
AIR SUSPENSION FAILURE
TAIL LIGHT WIRING FIRES
Understanding NHTSA Investigations
Preliminary Evaluation (PE)
Initial assessment of a potential safety defect, typically opened after receiving multiple consumer complaints about similar issues.
Engineering Analysis (EA)
In-depth technical evaluation that may include testing, data collection from manufacturers, and detailed defect analysis.
Recall Query (RQ)
Evaluation of the effectiveness of a previously issued recall remedy, often triggered when complaints persist after a recall.
Investigation Outcomes
Investigations may result in a voluntary recall by the manufacturer, a mandatory recall order, or closure if no defect is found.
Data from NHTSA Office of Defects Investigation. PlainCars does not rate or recommend vehicles. about how PlainCars sources NHTSA data.