1991 Jeep Wrangler engine and engine cooling problems
12 owner complaints filed with NHTSA name the engine and engine cooling on the 1991 Jeep Wrangler — 16% of all complaints for this model year.
What owners report
“Vehicle will stall suddenly in extreme hot weather usually does it within any time. Consumer must wait for vehicle to cool down, and then it will crank back up.*ak”
filed Oct 12, 2000
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Outer exhaust manifold studs may fatigue/break. *ak
110798 · Service Bulletin/Repair Instructions · issued Dec 11, 1998The outer exhaust manifold studs may fatigue and break. *yc
110798 · Service Bulletin/Repair Instructions · issued Jul 31, 1998Recall notification and procedure on catalytic conveter and carburetor. *yc
98698 · Service Bulletin/Repair Instructions · issued Sep 1, 1997Concerns with engine coolant usage. *nlm
070397 · Service Bulletin/Repair Instructions · issued May 9, 1997Various car owner's have expressed interest in using engine coolants made with propylene glycol instead of ethylene glycol. *yc
070397 · Service Bulletin/Repair Instructions · issued May 9, 1997
Engine and Engine Cooling problems in other Wrangler years
| Year | Reports | Share |
|---|---|---|
| 2023 Wrangler | 2 | 1% |
| 2022 Wrangler | 2 | 1% |
| 2021 Wrangler | 3 | 0% |
| 2020 Wrangler | 5 | 1% |
| 2019 Wrangler | 5 | 1% |
| 2018 Wrangler | 3 | 0% |
| 2017 Wrangler | 1 | 0% |
| 2016 Wrangler | 5 | 1% |
| 2015 Wrangler | 4 | 1% |
| 2014 Wrangler | 9 | 1% |
| 2013 Wrangler | 4 | 1% |
| 2012 Wrangler | 7 | 1% |
Other reported problem areas on the 1991 Jeep Wrangler
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.