1991 Geo Prizm engine and engine cooling problems
10 owner complaints filed with NHTSA name the engine and engine cooling on the 1991 Geo Prizm — 22% of all complaints for this model year.
What owners report
“Tl*the contact owns a 1991 geo prizm. The contact stated that while driving at various speeds, carbon monoxide was present because the manifold had been fractured. The vehicle was repaired twice but the failure continued. The failure mileage was approximately 190,000.”
filed Nov 17, 2010
“Jan/01 - discovered cracked exhaust manifold. Was told by salvage yard that this is a common problem with geos and they can't keep manifolds in stock because of the frequency. New manifold installed to replace cracked one. The new one cracked approx. 1-2 months later.*ak”
filed May 29, 2001
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
130089009 · Service Bulletin/Repair Instructions · issued Sep 1, 2013
Engine and Engine Cooling problems in other Prizm years
| Year | Reports | Share |
|---|---|---|
| 1999 Prizm | 2 | 8% |
| 1997 Prizm | 1 | 2% |
| 1996 Prizm | 2 | 3% |
| 1995 Prizm | 5 | 5% |
| 1994 Prizm | 7 | 5% |
| 1993 Prizm | 8 | 10% |
| 1992 Prizm | 15 | 30% |
| 1990 Prizm | 6 | 16% |
Other reported problem areas on the 1991 Geo Prizm
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.