Problems · by component

2012 Jeep Wrangler Unlimited power train problems

282 owner complaints to NHTSA about the 2012 Jeep Wrangler Unlimited cite power train, 34% of all 836 complaints for this model year.

Complaints
282
34% of all complaints
Crashes
3
Reported by owners
Fires
1
Reported by owners
Injuries
1
Reported by owners
01 —Owner reports

What owners say about the power train

Verbatim from NHTSA complaints, newest first
“My Oil pump and oil sensor keep going out every 4,000 miles. I have already had to replace it once. I don’t want to have to do it again. Clearly something is causing this issue.”
Owner complaint to NHTSAFiled Jan 8, 2026Power trainODI 11709695
“Report from diagnostic service 1-9-2023 cylinder head - has premature failure of valve guides and cylinder head replacement is required for repair. Yes, Jeep extended the warranty but if your vehicle did not show problems they would not fix it, but they did learn and knew at the point the seriousness of the problem and put an end date on the fix. Our vehicle outlasted their warranty by 30,000 but now is undrivable. Before anything serious happens as the driver drives on longer drives we have grounded the vehicle.”
Owner complaint to NHTSAFiled Jan 10, 2024Power trainODI 11564675
“Engine Stalls Randomly while Driving. Will crank over several times and over approx 10-15 min. of cranking(Say every 3-5min) vehicle will and will restart. No check engine lights and no warning. The loss of power can be dangerous since brake and steering assist require engine to be running. Vehicle will be fine for several days local commute and problem will recur without warning, usually on longer commute. Vehicle is unsafe and unpredictable.”
Owner complaint to NHTSAFiled Apr 4, 2023Power train, Engine, Fuel/propulsion systemODI 11515380
“The vehicle would take a minute to click into gear when at a light and also when driving on the freeway, the vehicle will only go up to a certain speed (40mph) and would not switch gears (automatic) after that, the RPMs just kept going higher until I had to pull over.”
Owner complaint to NHTSAFiled Jul 28, 2022Power trainCrash reportedODI 11476274
“While driving the car randomly stalls. I lose power steering and braking. The car will not restart. This issue has been recorded by the dealer. The vehicle was last inspected on July 5th. I have been issued a Jeep Care case manager, case # 82963828. There are no warnings, while driving makes a left-hand turn the car just stalls!”
Owner complaint to NHTSAFiled Jul 12, 2022Power train, EngineODI 11473598
“Starting out at a stop light, engaging the clutch to start moving, I depressed the clutch to shift into second gear while making a turn, the vehicle stalls, losing all power.”
Owner complaint to NHTSAFiled Jul 4, 2022Power train, Electrical system, EngineODI 11472273

Showing 6 of 282 reports. Read every report on NHTSA.gov.

Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 10, 2026NHTSA vehicle page

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.