FaultScore

1991 Jeep Wrangler engine problems

14 of the 100 complaints about the 1991 Jeep Wrangler are about the engine — 14% of everything reported for this model year.

B

14

Complaints

0

Crashes

0

Fires

0

Injuries

Exactly what failed

Engine 10 71.4%
Gasoline 2 14.3%
Catalytic Convertor 2 14.3%

Engine & Cooling across every Jeep Wrangler year

1989 13 0.5%
1990 11 0.4%
1991 14 0.5%
1993 19 0.7%
1994 29 1.1%
1995 39 1.4%
1997 122 4.5%
1998 58 2.2%
1999 53 2.0%
2000 28 1.0%
2001 26 1.0%
2004 13 0.5%
2005 40 1.5%
2006 29 1.1%
2007 62 2.3%
2008 48 1.8%
2009 23 0.9%
2010 53 2.0%
2011 42 1.6%
2012 179 6.6%
2013 144 5.3%
2014 331 12.3%
2015 130 4.8%
2016 93 3.4%
2017 62 2.3%
2018 101 3.7%
2019 48 1.8%
2020 59 2.2%
2021 218 8.1%
2022 89 3.3%
2023 100 3.7%
2024 397 14.7%
2025 24 0.9%

What owners said

Filed with NHTSA, in their own words.

Evansville, IN

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

CONSUMER WILL PROVIDE MORE INFORMATION ON THE CATALYTIC CONVERTER PROBLEMS.

NHTSA complaint #10046213 — an unverified report by a vehicle owner.

Helotes, TX

ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

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.

NHTSA complaint #872833 — an unverified report by a vehicle owner.

Sweetwater, NJ

ENGINE AND ENGINE COOLING:ENGINE:GASOLINE

FUEL PUMP/FRONT BRAKE ROTORS/GAS GUAGE MALFUNCTIONED. IN ADDITION, ENGINE KNOCKS AND RADIO MAKES NOISE.

NHTSA complaint #534923 — an unverified report by a vehicle owner.

Columbia, SC

ENGINE AND ENGINE COOLING:ENGINE

ENGINE VALVE COVER GASKET FAILED. THE COMPLAINT IS BEING INVESTIGATED UNDER ODI 517662. *MJS

NHTSA complaint #780082 — an unverified report by a vehicle owner.

Columbia, SC

ENGINE AND ENGINE COOLING:ENGINE

VALVE COVER GASKET.

NHTSA complaint #536596 — an unverified report by a vehicle owner.

Columbia, SC

ENGINE AND ENGINE COOLING:ENGINE

REQUESTING UPDATE ON ODI #571662.

NHTSA complaint #528966 — an unverified report by a vehicle owner.

Columbia, SC

ENGINE AND ENGINE COOLING:ENGINE

VALVE COVER GASKET FAILURE DUE TO POOR DESIGN.

NHTSA complaint #780834 — an unverified report by a vehicle owner.

Columbia, SC

ENGINE AND ENGINE COOLING:ENGINE

VALVE COVER GASKET FAILURE.

NHTSA complaint #781577 — an unverified report by a vehicle owner.

Columbia, SC

ENGINE AND ENGINE COOLING:ENGINE

VALVE COVER GASKET FAILURE.

NHTSA complaint #781577 — an unverified report by a vehicle owner.

Columbia, SC

ENGINE AND ENGINE COOLING:ENGINE

VALVE COVER GASKET FAILURE DUE TO POOR DESIGN.

NHTSA complaint #780834 — an unverified report by a vehicle owner.

Laurel, MD

ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR

CATALYTIC CONVERTER FAILED, PRIOR TO FACTORY RECALL #681.

NHTSA complaint #516402 — an unverified report by a vehicle owner.

Columbia, SC

ENGINE AND ENGINE COOLING:ENGINE

ENGINE HEAD GASKET/VALVE COVER GASKET FAILED DUE TO DESIGN FLAW, CAUSING GAS TO LEAK.

NHTSA complaint #523410 — an unverified report by a vehicle owner.

Chattanooga, TN

ENGINE AND ENGINE COOLING:ENGINE

ENGINE HEAD GASKET/VALVE COVER ARE DESIGNED POORLY AND ARE PRONE TO FAILURE.

NHTSA complaint #517662 — an unverified report by a vehicle owner.

Chattanoga, TN

ENGINE AND ENGINE COOLING:ENGINE

THE VALVE COVER AND ENGINE GASKET ARE EXPERIENCING OIL LEAKS WHICH COULD CAUSE A FIRE.

NHTSA complaint #812045 — an unverified report by a vehicle owner.

Other 1991 Jeep Wrangler problems

← Full 1991 Jeep Wrangler report