Plate - Planetary
full bulletin at NHTSA ↗2012 Jeep Wrangler powertrain problems
moderate Owners of the 2012 Jeep Wrangler have filed 127 NHTSA complaints about the powertrain, typically surfacing around 22,058 miles at roughly $2,500 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See powertrain across all vehicles →
Failure mileage
Complaints
127
Recalls
0
Avg fix
$2,500
| Model year | powertrain complaints |
|---|---|
| 2008 Wrangler | 88 |
| 2009 Wrangler | 43 |
| 2010 Wrangler | 63 |
| 2011 Wrangler | 33 |
| 2012 Wrangler (this page) | 127 |
| 2013 Wrangler | 101 |
| 2014 Wrangler | 80 |
| 2015 Wrangler | 48 |
| 2016 Wrangler | 71 |
3crashes
1fire
1injury
When does it fail?
Of the 127 powertrain complaints filed for the 2012 Jeep Wrangler, here's the actual mileage breakdown — failures cluster heaviest at 25,000-50,000 mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 127 powertrain complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
Among the 19 model years of Jeep Wrangler in our records for powertrain problems, this one ranks #2 by owner-complaint volume.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering powertrain on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
Gear Ratio DTC?s, Transmission Shift Concerns, Does Not Shift At Times, Shudders
full bulletin at NHTSA ↗Transmission Kit with Torque Converter 1. All Promaster (VF) 3.6L/62TE equipped vehicles. If the transmission bracket to the transmission case fasteners are removed during servicing, the fasteners (Part Number 06511385A$) are one-time usage. Vehicles built prior to 10/23/2015 requires Service Kit PN 68461214AA; includes Transmission Isolator PN 68264483AA, and Adaptation Bracket 68264479AA and Fastener Service Kit PN 68329056AA Vehicles built after on or after 10/23/2015 will require only the Fastener Service Kit PN 68329056AA. 2. All 3.6L/62TE equipped vehicles. If the vehicle you are repairing has a crack in the flex plate or failed pump bushing inspect and confirm that both (2) dowel pins
full bulletin at NHTSA ↗Flash: Powertrain Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with updated software. The customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Code (DTCs): · **P0456 - EVAP System Small Leak (13 MY only).** · U0140 Lost Communication With Body Control Module. Attempting to clear the DTC may be unsuccessful. Other enhancements included in this update: · Improved fuel pump relay operation. · Improved remote start time after key activation. · Improved Automatic Shutdown Relay (ASD) timer calibration.
full bulletin at NHTSA ↗Flash: 3.6L Diagnostic And System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with updated software. The customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Code (DTCs): · U0140 Lost Communication With Body Control Module. Attempting to clear the DTC may be unsuccessful. Other enhancements included in this update: · Improved fuel pump relay operation. · Improved remote start time after key activation. · Improved Automatic Shutdown Relay (ASD) timer calibration.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
The 2012 Wrangler powertrain shows patterns of failure across multiple critical components, often compounded by dealer and manufacturer inaction.
Transmission oil cooler tube leaks under Recall N28 are rampant, but Chrysler rationed replacement parts to one per week or every 14 days per dealership, leaving owners on waiting lists for 6+ months to over two years. Some dealers charged customers $500+ out-of-pocket despite recall coverage. The tube rubs through from power steering line contact, leaking flammable fluid onto the exhaust—a genuine fire hazard.
Stalling and loss of power occur frequently, sometimes multiple times per day, even after PCM replacement costing $600+. Check engine lights and traction control lights illuminate unpredictably; in stop-and-go traffic, the engine drops to idle and quits, creating near-miss intersection accidents. Smog test failures due to persistent misfire codes plague owners.
Differential failure at 48k miles disabled shifting entirely; the dealer's refusal to address secondary clutch damage caused by the failure became a separate $1,000+ problem. Manual transmission synchro cracks and reverse gear popping out of place are also documented.
Electrical chaos—lights staying on, HVAC erratic, temperature display flipping Fahrenheit to Celsius—plagues early ownership. Park gear fails to engage fully, causing vehicles to roll backward on hills even after brake shoe replacement.
Heater/defroster sludge and oil cooler leaks surface just outside warranty. Dealers blame owners and deny claims. Clutch and bearing failures under 40k miles appear premature for mild-use vehicles.
Same Jeep Wrangler powertrain reports on nearby years: 2009 · 2010 · 2011 · 2013 · 2014
Failure modes owners describe
Transmission Oil Cooler Tube Leakage & Recall Parts Shortage
Power steering line rubs transmission oil cooler tube causing wear holes; tube leaks transmission fluid which can ignite on hot exhaust (underbody fire risk). Recall N28/NHTSA 13V-234 issued but Chrysler severely restricted parts supply — dealers receive only 1 part per week to every 14 days, creating waits of 6+ months to 2 years for customers on waiting lists.
When: Typically under 50,000 miles; recall issued September 2013
Symptoms owners cite: Transmission fluid leak onto garage floor; Transmission not shifting properly; Potential underbody fire risk if leaking fluid contacts ignition source; Loss of transmission function
Repairs/costs cited: Recall part CBRAN281AA replacement; cost ~$503 reported by one owner; dealers charged customers for work covered by recall due to parts availability confusion
Recalls/TSBs owners mention: Recall N28/NHTSA 13V-234 issued; parts rationed severely (1 per week to 1 per 14 days); some dealers charged customers out-of-pocket despite recall coverage; extended warranty offered by Jeep for some related failures
Differential Failure with Secondary Transmission Damage
Rear differential failed with front and rear fluid leaks; flange and yolk of drive shaft affected. During failure, driver lost ability to downshift. Subsequent clutch noise (throw-out bearing) and vibration in manual stick developed but dealer refused to address as warranty-related or resultant damage.
When: 48,806 miles
Symptoms owners cite: Both front and rear differential leaking; Severe vibration in manual stick shift; Cannot shift to slow vehicle during failure; Whining sound from clutch/throw-out bearing after repair
Repairs/costs cited: Differential repair covered under powertrain warranty; throw-out bearing noise persisted; dealer stated noise was normal and clutch not under warranty
Recalls/TSBs owners mention: Powertrain warranty covered differential repair; dealer declined to address clutch damage as consequence of differential failure
Stalling & Loss of Power Under Load
Engine stalls and loses power during acceleration, entering traffic, hill climbs, and at stops. Check engine light and traction control light illuminate frequently. Events occur multiple times per day. Multiple diagnostic visits and PCM replacement ($600+) failed to resolve. Smog test failure due to diagnostic code P0394.
When: Early ownership (1-2 months in) escalating to 36,000+ miles; recurring throughout ownership
Symptoms owners cite: Sudden loss of power while driving (55–65 mph drops to 40 mph); Engine stalls at stops and in intersections; Check engine light and traction control light illuminate together; Vehicle jerks hard as if downshifting in automatic transmission; Difficulty accelerating after stops; P0394 diagnostic code (cylinder misfire implied in related complaint)
Codes mentioned: P0394
Repairs/costs cited: PCM (powertrain control module) replacement cost >$600; code clearing at dealership did not resolve issue
Recalls/TSBs owners mention: PCM reflash/update performed by dealer; subsequent diagnosis inconclusive; dealer unable to reproduce problem
Rough Idle, Engine Misfire & Cylinder Head Failure
Engine runs rough at idle with abnormal vibration felt by all passengers. Ticking noise on left side since new but worsened. White exhaust emissions after cold start. MIL code P0306 (cylinder 6 misfire). PCM reflash made problem worse. Investigation revealed cylinder head valve guide and head premature failure requiring rebuild/replacement. Dealer initially blamed owner for putting water in gas.
When: Reported at 18,000 miles; heads/valves replaced by 10,000 miles; later complaint at ~90,000 miles noted engine failure
Symptoms owners cite: Very rough idle with abnormal vehicle vibration; Intermittent speed and sound changes while idling; Loud engine noise; Ticking noise on left side; White exhaust after cold start; Loss of power at acceleration (top of gears, manual); Severely reduced gas mileage (~25% worse); MIL on and off repeatedly; Engine stalling nearly at times
Codes mentioned: P0306
Repairs/costs cited: Cylinder heads and valves replaced (10+ days after parts wait); dealer cost to owner unclear; later owner reported complete engine replacement at ~90,000 miles
Recalls/TSBs owners mention: PCM reflash attempted; dealer performed heads/valves replacement; later owner reported Jeep would not assist with engine failure despite check engine light being on while in warranty
Transmission Electrical Control Module (TIPM) Failure
All warning lights in cluster illuminate simultaneously; transmission locks in first gear and will not shift. Vehicle becomes uncontrollable with flashing warning lights and dinging sounds. Engine cranks but won't restart until multiple attempts. All vehicle systems report failure in diagnostic scan.
When: 52,000 miles
Symptoms owners cite: All warning lights and cluster lights illuminate; Automatic transmission locked in first gear; Cannot shift out of first gear; All systems reporting failure; Hot oil warning message; Electric fan running continuously; Engine won't restart immediately; requires multiple attempts; Severe loss of vehicle control
Repairs/costs cited: TIPM (transmission integrated power module) replacement required; part on back order; Chrysler rental car provided for 10 days then discontinued despite part still unavailable after 16 days
Recalls/TSBs owners mention: TIPM failure declared not under warranty; rental car coverage limited to 10 days; parts on back order with unknown ETA
Transmission Synchro Failure & Gear Engagement Issues
Manual transmission difficulty engaging first gear (notchy, hard to engage). Reverse gear pops out of place during reverse operation. 1st gear synchro cracked and failed, requiring vehicle to start in 2nd gear. Manual transmission reports in forums cite popping out of gear and difficult shifting.
When: Early ownership; failures reported at low mileage
Symptoms owners cite: Difficult and notchy shifting in all gears; Hard to engage 1st gear when rolling slowly; 1st gear synchro cracked; Cannot engage 1st gear at all in one case; Reverse gear pops out of place during reverse operation; Must double-clutch to engage 1st when rolling; Reverse grinds; Gear shifter shakes excessively in 4th and 5th
Repairs/costs cited: Synchro replacement performed by dealer; replacement part on back order in another case (2+ months wait)
Recalls/TSBs owners mention: Dealer performed repairs; parts availability issues for replacements
Transmission Fluid Drain Pan Leakage
Transmission drain pan leaks transmission fluid at low mileage (29,000 miles). Dealer attributes leak to rust, but forum reports indicate multiple 2012 Wranglers with same year/low mileage have identical problem, suggesting design or material issue.
When: 29,000 miles
Symptoms owners cite: Transmission fluid leaking from drain pan; Rust on pan (reportedly)
Repairs/costs cited: Pan replacement needed; owner queried whether pan material incompatible with oil
Recalls/TSBs owners mention: No recall issued; dealer blamed rust as cause
Automatic Transmission Accidental Downshift (Electronic Range Select)
Electronic range select shifter allows inadvertent downshifts with minimal lever movement to the left. Slightest, barely perceptible contact causes unintended downshift while upshift requires definite rightward movement. Affects traction on unpaved, gravel, icy, or snowy roads; causes sudden deceleration, confusion, and engine over-rev.
When: At 1,100 miles on new vehicle
Symptoms owners cite: Frequent, accidental downshifts on every trip; Hair-trigger nature of shift lever; Slightest movement left causes downshift; Definite movement right required for upshift; Sudden deceleration from unintended downshift; Loss of traction on unpaved/gravel/icy/snowy roads; Engine over-revving
Repairs/costs cited: No repair documented; design issue in shifter sensitivity
Parking Brake / Park Gear Failure
Park gear fails to engage fully; vehicle rolls backward down incline with people nearby. Parking brake shoes replaced and adjusted but emergency brake still inadequate on non-flat surfaces. Manual transmission owner must leave vehicle in gear to prevent rolling.
When: Low mileage; recurring issue
Symptoms owners cite: Park gear fails to engage; Vehicle rolls backward on hills despite park engaged; Parking pawl ratchets audibly when park should be engaged; Parking brake inadequate (shoes adjusted/replaced); Manual transmission owners must leave vehicle in gear
Repairs/costs cited: Parking brake shoes replaced and adjusted; dealer unable to duplicate failure; no repair completed
Recalls/TSBs owners mention: Dealership could not reproduce failure; declined to repair
Electrical System Malfunctions (Lights, HVAC, Switches)
Multiple electrical gremlins: light switches not working or functioning erratically; lights stay on after turning off; defrost activates when off; heater erratic. Temperature display switches from Fahrenheit to Celsius without input. Brake response weak and odd at times despite complete brake replacement.
When: 1–2 months into ownership; escalating to 36,000+ miles
Symptoms owners cite: Light switches malfunction; lights stay on; Defrost activates when switched off; Heater won't come on, then works after toggling; Defrost comes on when defrost is off; Temperature display changes Fahrenheit to Celsius; Weak brake response at times; Brakes respond oddly despite complete replacement
Repairs/costs cited: Complete brake replacement performed; electrical issues persist and unresolved
Recalls/TSBs owners mention: No manufacturer response documented
Brake Noise & Rotor Issues
Loud noise when brakes engaged while driving at various speeds. Dealer diagnosed rotors need resurfacing. Also noted in complaint context with transmission oil cooler recall.
When: 300 miles; current mileage 25,000
Symptoms owners cite: Loud noise when brakes engaged
Repairs/costs cited: Rotors needed resurfacing (not performed per report)
Recalls/TSBs owners mention: Dealer diagnosed rotor resurfacing needed; vehicle not repaired for brake failure
Clutch & Throw-Out Bearing Noise
Whining sound from clutch and throw-out bearing after differential repair. Dealer stated noise was normal and clutch not under warranty despite potential damage from differential failure.
When: After differential failure repair at 48,806 miles
Symptoms owners cite: Whining sound from clutch; Throw-out bearing noise
Repairs/costs cited: Dealer declined warranty coverage; stated noise normal
Recalls/TSBs owners mention: Powertrain warranty declined for clutch; dealer stated noise acceptable
Oil Filter/Oil Cooler Assembly Leak
3.6 Pentastar V6 oil filter/oil cooler assembly develops major oil leak. Oil drips onto exhaust posing fire risk. All new Chrysler 3.6 and 3.2 V6 models reportedly affected. 2014 models have new part with additional oil leak problems.
When: 3 years old (~36,000 miles implied)
Symptoms owners cite: Major oil leak from filter/cooler assembly; Oil smell and visible dripping on exhaust; Fire hazard from oil on hot exhaust; Risk of engine oil loss causing motor destruction
Repairs/costs cited: Replacement part cost ~$600
Oil Housing Crack During Routine Maintenance
Integral plastic part of oil housing cracks during routine oil change. Repair cost $600–$1,000. Consumers cannot prove whether break was due to oil change negligence or defective design. Cost absorbed entirely by consumer. Owner reports same plastic part susceptible to breaking at each future oil change.
When: During routine oil change
Symptoms owners cite: Cracked oil housing; Cannot distinguish owner negligence from defect
Repairs/costs cited: Replacement part cost ~$600; replaced with same plastic part; owner concerned about repeated failures
Recalls/TSBs owners mention: No recall issued despite owner's request
Engine Knock/Spark Knock Noise (Pre-Ignition)
Noise similar to spark knock or pre-ignition from engine compartment since vehicle was new. Noise initially subsides after warm-up but now persists even after warm-up. More noticeable in cold weather. Dealer unable to locate source despite inspection and technician test drive.
When: Since new; persists even after warm-up in later stage
Symptoms owners cite: Spark knock or pre-ignition-like noise from engine; Persists after warm-up; More noticeable in cold weather
Repairs/costs cited: Dealer checked loose cables but found no source; issue unresolved
Coolant Sludge in Radiator & Heater Core
No heat from driver-side vents (including defroster); only lukewarm heat on passenger side. Dealer states radiator and heater core filled with sludge. Forum research indicates this is common in these Jeeps. Chrysler has provided no explanation for cause. Lack of defroster creates safety hazard. Issue develops just outside warranty period.
When: Just outside warranty period
Symptoms owners cite: No heat from driver-side vents; No defroster on driver side (safety hazard); Only lukewarm heat on passenger side; Radiator and heater core filled with sludge
Repairs/costs cited: Radiator and heater core replacement needed; dealer refusing to pay out of warranty
Recalls/TSBs owners mention: Chrysler has given no answer to cause; no recall issued despite reported frequency
Transmission Pops Out of Gear (Manual)
Transmission pops out of gear while driving. Safety hazard: vehicle stops suddenly; driver cannot engage reverse when expected. Dealership refused warranty repair, claiming issue did not occur during technician test drive. Later transmission completely fails.
When: Early ownership; within warranty but post-purchase (36,700 miles)
Symptoms owners cite: Transmission pops out of gear; Vehicle stops suddenly; Cannot engage reverse when expected
Repairs/costs cited: Warranty denied by dealership; later complete transmission failure requiring repair
Recalls/TSBs owners mention: Warranty denied by dealership due to inability to reproduce during test drive
Gas Tank Crack & Fuel Fume Leak
Gas tank develops crack causing fuel fume leaks. Owner suspects defective manufacturing (possibly China-made parts). Safety hazard: potential fire/explosion risk.
When: Low mileage (under 36,700 miles)
Symptoms owners cite: Gas tank crack; Fumes leak
Repairs/costs cited: Owner suspects defective parts
Clutch Failure at Low Mileage
Clutch inadvertently goes out during normal city commute driving at 40 mph on flat Florida terrain. Clutch failure at 40,000 miles is premature. Owner notes mild driving habits and no off-road use.
When: ~40,000 miles
Symptoms owners cite: Clutch inadvertently goes out
Repairs/costs cited: Owner concerned about flywheel and clutch assembly
Heater & A/C Failure; Reverse Gear Engagement Anomaly
Air conditioning and defroster fail on highway; windshield fogs up creating safety hazard in rainy/foggy conditions. Separately, vehicle locked in park but suddenly starts going in reverse with engine running, nearly hitting person behind vehicle.
When: During highway driving; separate incident in service area
Symptoms owners cite: A/C and defroster fail; Windshield fogs up; Vehicle rolls backward in reverse with engine running despite park engaged
Cylinder Head Valve Guide Premature Failure (Extended Warranty Issue)
Cylinder head premature failure of valve guides requiring replacement. Jeep extended warranty coverage but only if problems manifest within extended period; vehicle outlasted extended warranty by 30,000 miles. Now undrivable and grounded by owner.
When: Beyond extended warranty coverage period
Symptoms owners cite: Cylinder head valve guide premature failure
Repairs/costs cited: Diagnostic service noted requirement for cylinder head replacement
Recalls/TSBs owners mention: Jeep extended warranty but set end date; vehicle out of coverage at failure
Synthesized from 127 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
I received an e-mail from Jeep around december stating recall n28 would affect my Jeep because the power steering line will rub the transmission oil cooler tube causing the vehicle to leak transmission fluid. I noticed on december 18th that my Jeep was in fact leaking transmission fluid so I called the closest Jeep dealership to me, gwinnett Jeep in stone mountain georgia, and took my vehicle…
Tl* the contact owns a 2012 Jeep wrangler. The contact stated that NHTSA campaign number: 13v234000 (power train) had exceeded a reasonable time for repair. The dealer advised the contact that the part was not available for repair. The manufacturer was made aware that the part was not available at the dealer. The vehicle was not repaired. The VIN was not available. The contact had not experienced…
Had powertrain trouble with your 2012 Jeep Wrangler?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the powertrain problem on the 2012 Jeep Wrangler?
It's a documented issue but not catastrophic. 127 complaints have been filed. Repairs average $2,500 and most owners catch it before it causes a breakdown.
At what mileage does the powertrain typically fail?
Across the 64 complaints that reported odometer mileage, most powertrain failures cluster between 12,000 and 42,000 miles, with the median around 22,058. A quarter of owners report trouble before 12,000; a quarter make it past 42,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $2,500 for powertrain repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to powertrain?
No active recalls currently cover powertrain issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2012/Jeep/Wrangler.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.