The Pentastar 3.6L V6 powers Wrangler, Grand Cherokee, Ram 1500, 300, Charger, Challenger, Pacifica, and many other Stellantis vehicles. The 2011-2013 generation had a notorious left cylinder head failure (Recall R26 / Stellantis CSP) - mostly resolved by 2014. Newer generations have rocker arm issues.
Mixed. 2011-2013 left cylinder head failure was widespread and covered by extended warranty. 2014+ generation fixed that but introduced rocker arm pin failures. 2016+ "upgraded" version is much improved.
Driver-side cylinder head valve seat/spring failure causes P0306/P0302 misfires and tick. Chrysler extended warranty to 10yr/150K on affected VINs (Customer Satisfaction Program N49). Free repair if you qualify.
View P0306 Diagnosis →Roller rocker arm pins fail and drop the rocker. Causes a hard tick and misfire. Replacement requires head removal in some cases.
View P0306 Diagnosis →Plastic oil cooler housing on top of the engine cracks and leaks oil into coolant. Updated aluminum housing is the permanent fix.
eTorque mild-hybrid Pentastar uses direct injection and builds carbon on intake valves by 60K-80K. Earlier port-injection versions do not.
View P0171 Diagnosis →Water pump weeps around 80K-100K. Combine with the standard plug change.
Standard age-related weep on both banks.
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2011-2013 with original left cylinder head and no CSP N49 repair. 2014-2015 Wrangler/Ram with original rocker arms.
2016+ "upgraded" Pentastar with cooled EGR and improved heads. 2018+ Wrangler JL Pentastar. The 5.7L HEMI is a different-problems trade-off (lifters/MDS).
If you own a 2011-2013, verify CSP N49 was completed - free repair if not. Budget $400-$800 for the eventual oil cooler housing. Plugs at 100K, walnut blast at 80K on DI variants.
If your Pentastar is throwing a check engine light, these are the codes most often associated with the problems above. Click any code for full diagnosis steps and typical repair costs.
2011-2013 Pentastar V6 has a known left (driver-side) cylinder head failure - valve seat or valve spring issue causing P0306/P0302 misfires and tick. Chrysler CSP N49 extended warranty to 10yr/150K on affected VINs.
2011-present Grand Cherokee, 2011-present Wrangler, 2011-present 300, Charger, Challenger, 2013-present Ram 1500, 2017-present Pacifica, 2014-present Cherokee, 2015-present Renegade (in some markets).
2016+ versions are reasonably reliable. 2011-2015 had widespread cylinder head and rocker arm issues. Check the VIN and ownership history carefully.
Timing chains (one per bank). No scheduled replacement, but expect chain noise if oil changes are stretched.
150,000-250,000 miles with regular service. The cylinder head issue (when present) usually appears between 80K-130K.
The 2016+ "upgraded" Pentastar added cooled EGR, two-step variable valve lift, and stronger internals. Notably more refined and more reliable than the 2011-2015 version.