2018 Chevrolet Impala power train problems
11 owner complaints filed with NHTSA name the power train on the 2018 Chevrolet Impala — 19% of all complaints for this model year.
What owners report
“The transmission failed, shifting is no longer smooth. It hesitates and shakes the entire car, and the car slows down to almost a crawl uphill. I understand this is an issue with Chevrolet Impalas. So now I have an $8200 bill for a problem I was never told about, and that GM knew that it existed…”
filed Jun 26, 2026
“The contact owns a 2018 Chevrolet Malibu. The contact stated that while driving at various speeds, the vehicle hesitated or jerked while depressing the accelerator pedal, with an abnormal humming sound coming from the vehicle. The contact stated that the check engine warning light was illuminated…”
filed Feb 24, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Power Train problems in other Impala years
| Year | Reports | Share |
|---|---|---|
| 2019 Impala | 5 | 18% |
| 2017 Impala | 12 | 10% |
| 2016 Impala | 16 | 15% |
| 2015 Impala | 16 | 5% |
| 2014 Impala | 37 | 6% |
| 2013 Impala | 33 | 12% |
| 2012 Impala | 27 | 10% |
| 2011 Impala | 64 | 13% |
| 2010 Impala | 67 | 15% |
| 2009 Impala | 68 | 8% |
| 2008 Impala | 91 | 11% |
| 2007 Impala | 80 | 13% |
Other reported problem areas on the 2018 Chevrolet Impala
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.