2005 Chevrolet Cobalt engine problems
69 owner complaints filed with NHTSA name the engine on the 2005 Chevrolet Cobalt — 4% of all complaints for this model year.
What owners report
“The contact owns a 2005 Chevrolet Cobalt. The contact stated that the key was stuck in the ignition. The contact had to use the key release to remove the key manually. No warning lights were illuminated. The vehicle was taken to an independent mechanic; however, no cause for the failure was found…”
filed Feb 12, 2026
“The tcm in my 5 cobalt is not working properly I've tested and replaced everything els and had the tcm reprogrammed still getting problems aiming back to the tcm it wasn't looked at by a business”
filed Nov 6, 2023
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Engine problems in other Cobalt years
| Year | Reports | Share |
|---|---|---|
| 2010 Cobalt | 38 | 7% |
| 2009 Cobalt | 39 | 5% |
| 2008 Cobalt | 36 | 4% |
| 2007 Cobalt | 56 | 4% |
| 2006 Cobalt | 93 | 4% |
Other reported problem areas on the 2005 Chevrolet Cobalt
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.