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What 59 owners told NHTSA about the 2018 Chevrolet Impala

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (59)Crash / fire / injury (6)Electrical system (11)Transmission & drivetrain (11)Brakes (8)Engine (7)Steering (7)Airbags (6)Lights (4)Fuel system (3)Seats (3)Speed control (2)

7 of 59 complaints match · Engine · clear filters

Nov 16, 2024Transmission & drivetrainAirbagsEngine

I was sold a used car w/ undisclosed accidents. Had many issues within first few weeks. Had transmission cooler lines replaced after they burst. Radiator, compressor, condenser, and much more. Then the Airbag light came on. Dealership said connectors were bad. Fixed it. Light came on again.took it in to dealership. They had it for over two weeks. The GM for all the dealerships Told me the vehicle was not unsafe and told me lies. But the service girl confessed she no longer had access to my vehicle or my file and her boss and the Gm had taken over working on it. She then told me they pulled Ford model air bags from my Chevy Impala. Now the light has come on again. I do not feel safe or rust the dealership to fix it properly.

NHTSA ODI 11625701

Aug 6, 2022Transmission & drivetrainElectrical systemEngine

While driving from work the car did a quick jerk and the STABILITRAK, ABS AND CHECK ENGINE LIGHT ALL CAME ON ALL AT ONCE. As I pulled into my workplace the car lost power to the engine completely while displaying ACTION REQUIRED ON THE LCD SCREEN. The brake and steering wheel became stiff and it was hard to control the vehicle. It took 10 minutes for me to regain power and control over the vehicle that again after leaving work stopped on the highway.

NHTSA ODI 11477959

Mar 28, 2022EngineFuel system

When driving on the highway at full speed my car suddenly loses power almost causing me to be hit from behind. I then get a Reduced Engine Power warning. Once I get the car off the road, I shut the engine off for a few minutes and then restart it. The car runs fine but the check engine lights remains on. This has happen 4 times this week.

NHTSA ODI 11458634

Aug 19, 2020Engine

TL* THE CONTACT OWNS A 2018 CHEVROLET IMPALA. THE CONTACT STATED THAT WHILE OPERATING THE VEHICLE, A STRANGE ODOR WAS PRESENT COMING FROM THE ENGINE INTO CABIN OF THE VEHICLE. THE VEHICLE WAS TAKEN TO LOCAL DEALER (RACEWAY CHEVROLET LOCATED AT 1510 SOUTH 5TH ST, HARTSVILLE, SC 29550) WHO DIAGNOSED THE AIR CONDITIONING EVAPORATOR COIL WAS DEFECTIVE AND HAD LEAKED FREON. THE COIL WAS REPLACED AND THE FAILURE WAS REMEDIED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 39,000.

NHTSA ODI 11350213

May 14, 2020Engine

MY VEHICLE HAS BEEN SERVICED SEVERAL TIMES SINCE I HAVE PURCHASED THE VEHICLE. THE CAR WILL COMPLETELY SHUT OFF WHEN ATTEMPTING TO TURN BACK ON AFTER THE AUTO STOP TURNS IT OFF THEN I HAVE TO PLACE THE PARK HIT THE START SWITCH AND RESTART THE VEHICLE. ALSO MY AC HAS STOPPED SEVERAL TIMES IN THE VEHICLE. THE AC COMPRESSOR WAS REPLACED IN 2019 AND HAD BEEN SERVICED TWICE BEFORE THAT HAPPENED BECAUSE IT BLOWS EXTREMELY LOW AND HAVE TO PUT IT ON HIGH JUST FOR THE AIR TO BLOW. AS OF TODAY THE AC HAS BEEN GOING IN AND OUT EVEN AFTER THE REPLACEMENT OF THE COMPRESSOR AND STILL NO ONE CAN TELL ME WHAT'S THE ISSUE! *TR

NHTSA ODI 11324490

Sep 30, 2019Electrical systemLightsEngine

I WENT TO THE STORE AND CAME OUT TO LEAVE. I ATTEMPTED TO START MY CAR AND THE RADIO CAME ON, LIGHTS IN THE CAR FLASHED A COUPLE OF TIMES AND THEN I TRIED AGAIN. THEN IT STARTED MAKING A CLICKING SOUND.

NHTSA ODI 11258945

Nov 19, 2018Electronic Stability Control (esc)Engine

STABILITRACK AND ENGINE LIGHT CAME ON AT THE SAME TIME WITH A MESSAGE THAT SAID, 'ENGINE POWER IS REDUCED'. THIS OCCURRED AS I WAS DRIVING ON THE HIGHWAY. THE VEHICLE GRADUALLY SLOWED, BUT I WAS ABLE TO MAINTAIN A SPEED OF 55 MPH. I WAS UNABLE TO ACCELERATE QUICKLY.

NHTSA ODI 11152371

Working with the data? Download all 59 complaints as CSV · fetched from NHTSA July 19, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2018 Chevrolet Impala verdict →