2014 Jeep Wrangler engine problems

Plastic oil filter housing (part number 68105583AA or later revisions like 05184294AE) cracks or develops seal failures, causing oil to leak from the top of the engine. Oil pools in the valley between cylinder heads under the intake manifold, then runs down onto the transmission, exhaust manifolds, and undercarriage. Creates burning smell as oil contacts hot engine components and exhaust. Previous model years used metal housings without this issue. Owner reports show dealers acknowledge this as a known, widespread defect; some dealers report waiting 6+ weeks for backorder parts with 65,000+ units in shortage.

When: Occurs from very low mileage (under 10k miles) through 100k+ miles. Most common reported window 20k–85k miles. Can happen early in vehicle life, sometimes within weeks of purchase or after routine oil changes.

Symptoms owners cite: Burning oil smell from engine bay, especially at highway speeds or under load; Oil pooling under engine, particularly in valley between cylinder heads; Oil on transmission bell housing, exhaust, skid plates, and undercarriage; Visible smoke from beneath hood or from engine when hot; Oil loss detected during oil checks, sometimes multiple quarts in short timeframe; No check engine light or low oil pressure warning in most cases

Repairs/costs cited: Replacement of entire oil filter/cooler housing assembly. Labor-intensive: requires removal of intake manifold and upper engine disassembly. Reported repair costs $750–$1,200+ for parts and labor. OEM replacement parts have long backorders (6+ weeks reported). Multiple owners report the replacement part is identical plastic design and expected to fail again. Some owners perform DIY for cost savings; parts cost cited as ~$250 but labor prohibitive at dealerships.

Recalls/TSBs owners mention: No factory recall issued. Dealer service advisors and technicians confirm knowledge of widespread issue. TSB mentioned in some complaints (TSB #SB-18-034-14 referenced for oil pressure sensor, different issue). Part number revised multiple times (68105583AA, then AE variant, 05184294AE), indicating redesign attempts, but plastic composition unchanged. Chrysler Corporate acknowledges issue per some owner accounts but refuses to cover under warranty or recall. 2015+ model years reportedly addressed this by redesigning or using metal housing; 2014 owners left unresolved.

Check engine light illuminates with cylinder misfire diagnostic trouble codes. Root cause identified as worn exhaust valve seats or defective cylinder head requiring full head replacement. Dealers report encountering this frequently on 2014 models. Issue not covered by TSB that applied only through 2013 model year (TSB 09-002-14 referenced). Replacement of cylinder head, gaskets, and related components required.

When: One complaint at 40k miles with subsequent recurrence within days of previous repair. Another at approximately 95k miles.

Symptoms owners cite: Check engine light illumination; Cylinder misfire diagnostic codes (specific codes not provided in narratives); Loss of acceleration or vehicle operating normally until sudden failure; Abnormal coolant odor and burning smell reported in one instance; Smoke from under hood in one case

Codes mentioned: Cylinder misfire (specific cylinder numbers not consistently reported, one narrative mentions cylinders #2 and #5)

Repairs/costs cited: Full cylinder head replacement with associated gaskets and intake manifold. Estimated cost over $2,000 not covered by warranty in at least one case. One owner caught failure four days before 5-year warranty expiration and coverage approved.

Recalls/TSBs owners mention: No formal recall. Chrysler issued TSB 09-002-14 addressing similar issue but only for 2013 and earlier model years, leaving 2014 owners unsupported despite apparently identical root cause. Dealers perform diagnosis at owner cost ($100 diagnostic charge mentioned) and offer repair estimates but do not cover under warranty when outside coverage period.

Malfunction indicator lamp (MIL/check engine light) illuminates with diagnostic trouble code related to engine oil pressure sensor circuit. TSB #SB-18-034-14 issued but repair is not warranty-covered and requires dealer service. Owner reports vehicle could potentially lock up due to insufficient oil pressure if not addressed.

When: Reported at approximately 47k miles in 2016 complaint; one complaint references June 6, 2014 as NHTSA reference date (#10056046).

Symptoms owners cite: Check engine light / MIL illuminates; Owner concern that insufficient oil pressure could lock engine during driving

Codes mentioned: Engine oil pressure sensor circuit malfunction code

Repairs/costs cited: $100 diagnostic fee + $252 repair charge at dealership to replace circuit. One owner reports 5-day wait for appointment.

Recalls/TSBs owners mention: TSB #SB-18-034-14 issued. Chrysler requires vehicle to be serviced at dealership for diagnosis and repair; corporate requires receipt of service ticket before considering any assistance. Not covered under recall; one owner reports Chrysler refused warranty coverage despite identifying issue themselves.

Loud tapping noise from one or both engine banks indicates bearing failure in the variable valve timing assembly, causing damage to camshafts, hydraulic lifters, and rocker assemblies. All four camshafts typically require replacement along with 24 hydraulic lifters and 24 rocker assemblies. Dealers report this as a common, well-known issue with Pentastar 3.6L engines in Wrangler vehicles. Technicians diagnose via stethoscope and automatically recommend full replacement of all components without further investigation.

When: Typically occurs around or shortly after 80k miles, though earlier occurrences reported. One narrative cites 80k miles; multiple vehicles in same service facility with same issue reported.

Symptoms owners cite: Loud tapping/knocking noise from engine, audible from one or both cylinder banks; Noise becomes progressively worse over time

Repairs/costs cited: Replacement of all 4 camshafts, 24 hydraulic lifters, 24 rocker assemblies. Labor approximately $1,220 plus parts approximately $2,770 (total ~$3,990+). One complainant notes multiple Wrangler Unlimited vehicles in single shop with identical issue simultaneously.

Recalls/TSBs owners mention: No recall issued. Dealers acknowledge this as a known, common issue on Pentastar 3.6L Wranglers. One owner reports mechanic stated Chrysler is aware of the problem. No evidence of warranty coverage or manufacturer assistance provided.

Engine suddenly seizes during operation without prior warning lights, messages, or symptoms. Vehicle stalled while in motion at high mileage, creating immediate loss of power and dangerous traffic hazard. Full engine replacement required (~$12,000). Owner attributes to known defect pattern with 3.6L Pentastar engine involving multiple complaints and litigation.

When: Reported at approximately 154,525 miles.

Symptoms owners cite: Sudden engine stall while vehicle in motion; Complete loss of power with no prior warning; No warning lamps or messages before failure

Repairs/costs cited: Full engine replacement estimated at approximately $12,000. Owner declined manufacturer goodwill assistance and issue remains unresolved.

Recalls/TSBs owners mention: Jeep/Stellantis Customer Care opened case file. Goodwill assistance declined by manufacturer per owner account. No recall identified for this specific failure mode.

Excessive oil sludge observed throughout engine at relatively low mileage despite routine oil changes and maintenance. Appears to be an anomalous condition not typical of normal engine operation.

When: Detected at approximately 30k miles.

Symptoms owners cite: Burning smell during highway driving; Loss of acceleration; Sludge visible throughout engine bay

Repairs/costs cited: Engine cleaning performed, all fluids replaced. No underlying mechanical defect identified by independent mechanic.

Black sludge appears in coolant overflow and radiator despite recent radiator, transmission cooler, and line replacements plus full system flush. Issue recurs within one year. Vehicle only 50k miles with coolant rated to 150k mile service life. Possible sand or debris in heater core; dealership unable to diagnose root cause. Persistent antifreeze odor reported in this vehicle and observed in other Wrangler JKs.

When: First occurrence within warranty, replaced components. Second occurrence one year later at 50k miles.

Symptoms owners cite: Black sludge in coolant system; Persistent antifreeze odor inside vehicle; Coolant contamination recurrence despite previous repairs

Repairs/costs cited: Radiator replacement, transmission cooler replacement, all cooling hoses replaced, system flush performed on first visit. Dealership suggests heater core replacement on second visit but indicates it may not be warranty-covered.