3.6 Pentastar V6 (petrol)
2011–2021 · petrol · 3604cc · 290hp
Engine codes: ERB, Pentastar
Reliability, common problems and owner reviews for the Jeep Grand Cherokee 3.6 Pentastar V6 (petrol). Check this before you buy used.
The 3.6 Pentastar — smooth and powerful but with a problem list: cylinder-head failures (notably the left-bank head causing a tick/misfire on early units), oil leaks, throttle-body defects, and overheating tied to faulty EGR coolers. Later updates improved it, but early WK2 examples are risky. Check for head/lifter tick and cooling faults.
Known Issues
Early Pentastar heads (left bank) fail causing tick/misfire; lifter issues also reported.
Fix / Workaround: Check for tick/misfire; ask if heads were replaced under campaign.
Repair cost: €800–€2500
Typically appears after: 100,000 km
Faulty EGR coolers cause overheating; various oil leaks.
Fix / Workaround: Replace EGR cooler; address leaks.
Repair cost: €200–€900
Mileage Thresholds
After 100,000 km: Head/lifter/EGR issues cluster.
Pre-Purchase Checklist
- ☐Cold-start tick/misfire check (heads)
- ☐Check cooling system / EGR cooler
- ☐Inspect for oil leaks
- ☐Prefer later updated units
Frequently asked questions
Is the Jeep Grand Cherokee 3.6 Pentastar V6 (petrol) reliable?
Problematic — The 3.6 Pentastar — smooth and powerful but with a problem list: cylinder-head failures (notably the left-bank head causing a tick/misfire on early units), oil leaks, throttle-body defects, and overheating tied to faulty EGR coolers. Later updates improved it, but early WK2 examples are risky. Check for head/lifter tick and cooling faults.
What are the common problems and reviews for the Jeep Grand Cherokee 3.6 Pentastar V6 (petrol)?
The most commonly reported problems: Cylinder head failure / lifter tick, EGR cooler overheating / oil leaks.
Is a used Jeep Grand Cherokee 3.6 Pentastar V6 (petrol) worth buying?
Known design issues and recurring faults that were never fully resolved. Buy only with eyes open.