Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2017 Chevrolet Impala owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2017 Chevrolet Impala. The contact stated while driving at an undisclosed speed, the vehicle lost motive power while depressing the accelerator pedal. The vehicle also failed to start intermittently. Neither the dealer nor manufacturer were made aware of the failure. The vehicle was not diagnosed nor repaired. The approximate failure mileage was 20,000.
2017 Chevy Impala 3.6L engine exhaust leak at the exhaust manifold / turbo charger. Resulting in exhaust fumes leaking driver/passenger area could cause fire and or damage to engine. Checking on the customer review and complaints page on the internet I have a lot of other complaints even to the point one persons wife developed lung cancer possible related to inhaling the exhaust according to her doctor. Who knows but I had a hard time getting my car to pass NC inspection because of the lake, please advise. As I am hard of hearing and didn't know I had this problem until the local NC Inspection station pointed it out all I knew was I could smell it or something. PS the email is that of my local mechanic, as I don't have one or how to even turn a computer on.
Upon after starting the car a noise was coming from front of engine. I took a video and saw fire coming from the front left catalytic converter between the flange and the converter. The converter separated itself from the flange. The car, a 2017 has only 50000 miles on it always garaged and no accidents Luckily caught the converter problem before it completely blew itself off the flange and caused a fire.
I am writing to formally express my deep dissatisfaction regarding a recurring issue with my vehicle's catalytic converter pipe. At 37,000 miles, the left-hand (front bank) catalytic converter pipe near the cylinder head mounting flange weld failed and was replaced under warranty by GM. Now, at just 88,000 miles, the same pipe has cracked again-at the identical location-and is not being covered by GM, forcing us to pay for repairs out of pocket. This is not simply a case of wear and tear. The failure not only resulted in significant performance issues, but also caused the housing of the fan to melt due to excessive heat exposure, posing a serious safety hazard. …
Tl* the contact owns a 2017 Chevrolet Impala. While driving approximately 45 MPH, the vehicle stalled and jerked forward. In addition, the emission system and check engine warning indicators illuminated. The vehicle was taken to crest Chevrolet (909 w 21st st, san bernardino, ca 92405, [phone]) where the battery was replaced, but the failure recurred. The vehicle was taken back to the same dealer where it was diagnosed that there was an unknown valve leak. The vehicle was repaired, but the failure recurred. While driving approximately 45 MPH, the vehicle jerked and caused the contact to lose control. The vehicle crashed into a concrete divider and the front driver's side tire blew out. The air bags did not deploy. The vehicle was damaged and towed to the same dealer. A police report was not filed. There were no injuries. The manufacturer was called, but no one answered the phone. …
Recently purchased this vehicle 3 months ago took it in for a routine oil change after driving it for several miles and filling the gas tank loud exhaust sound with an OnStar diagnostic p0151 code appeared. Thinking there was water in the line I purchased heat to remove the moisture with no results. I proceeded to open the hood of the car for inspection and found the oxygen sensors lying in the cooling fans and the catalytic converter disconnected from the engine block. The plate was still connected with new nuts and bolts but the part looked rusted which seem odd for a car this new as a result of the heat escaping the engine block via the opening the cooling fans melted. I check for recalls on this model and there were none showing via several sources including the manufacturer's web site. …
I purchased a 2017 Chevrolet Impala vehicle in March of 2019 and a few month's after purchasing the vehicle I immediately started noticing that the vehicle wold stall and or hesitate to start every time I would put gas in it. Immediately after that the check engine light came on and remained on until this day. I currently work at carmax and after speaking with some mechanic's, as well as as reading some of the other complaint's I believe I am experiencing the same problem as 2 other buyer's that have previously filed a complaint regarding this vehicle.the spark plug tubes are leaking and the leaks are caused by porous spots in the head created during manufacturing. The spark plug tubes are permanently sealed into the head and are not replaceable. This is a manufacturing problem that needs to be taken care of immediately. …
Vehicle was condo parking area in spi texas and lowell,in. Mice chewed fuel ijection harness (disabling(3 cyl) on feb.10,2018 and again 10 days later harness ( 4cyl) and foam intake manifold. All soybean based wires and foam. Both repaired at gillman Chevy in harligen ,tx. Then on 6/21/2018 there was an extreme safety event with rodent damage to soy based fuel line elbow on top of fuel tank that pumped out 8 gallons of gas on top of hot exhaust system with the potential of fire in rear of car in 10 miles of travel from hebron,in to lowell,in. The fuel pump shutoff for run away fuel pump never deployed thus creating extreme hazard that was undectable inside vehicle.the fuel line was repaired by smith Chevy in lowell, in on 6/21/2018. The repair bills were $731.50, $592.10 and $507.17 respectively for a total of $1830.72. …
Tl* the contact owns a 2017 Chevrolet Impala. While driving approximately 65 MPH, the vehicle shut off without warning. The vehicle was taken to barton Chevrolet [phone], 800 auto park pl, newburgh, ny 12550) where it was diagnosed that a plastic bag was sucked into the air filter and blocked air from entering the engine. The technician removed the plastic bag and replaced the air filter. The contact removed the remaining debris that had previously accumulated. The technician could not guarantee that the failure would not recur, stating that the vehicle performed as designed. The manufacturer was made aware of the failure, but did not return the contact's call. The failure mileage was 10,018.
Tl* the contact owns a 2017 chevorlet Impala. The contact stated that exhaust smoke seeped into the vehicle through the air vents. The vehicle also accelerated on its own and extreme pressure had to be applied to the brake pedal to stop the vehicle. In addition, coolant was leaking from the engine. There were no warning indicators illuminated. The vehicle was taken to rotolo Chevrolet (16666 s highland ave, fontana, ca 92336, [phone]), but no assistance was provided. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failures. The failure mileage was 35,312.
Engine complaints in other Impala years
Frequently asked questions
How common are engine problems on the 2017 Chevrolet Impala?
NHTSA has 21 complaints about the engine & cooling of the 2017 Chevrolet Impala, 18% of the model year's 117 complaints.
Is there a recall for 2017 Chevrolet Impala engine problems?
No. NHTSA lists no engine & cooling recall for the 2017 Chevrolet Impala. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2017 Chevrolet Impala engine problems start?
Half of the complaints with a recorded mileage happened before about 48,000 miles, and 29% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 1 injury to engine & cooling problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.