Case file · JEEP-WRANGLER-2007-2018 · Field document

Jeep Wrangler 2007–2018 · Pre-purchase checklist

Bring this to the inspection. Every check below is specific to this generation's documented failure modes — not generic used-car advice.

1. Check 01

   Drive at highway speed and hit a few expansion joints/bumps. Any front-end shimmy that builds into a violent shake (death wobble) means a steering/suspension inspection before you buy — track bar, ball joints, tie rods, steering damper.

2. Check 02

   On 2012–2013 3.6L cars: scan for cylinder 2/4/6 misfire codes and listen for a top-end tick. Ask whether the left cylinder head was replaced under Chrysler's warranty extension; a documented replacement is a plus, not a minus.

3. Check 03

   On 2007–2011 3.8L cars: check the oil level and ask the owner how often they top it off. A quart every 1,500–2,000 miles is common. Look under for exhaust manifold ticking on cold start and weeping intake/thermostat gaskets.

4. Check 04

   On any Pentastar (3.6L): look for oil seepage and dried oil down the back of the engine valley — the plastic oil cooler/filter housing leaks oil and coolant.

5. Check 05

   Test EVERY power window and door lock several times. Listen for a pop or grind — window regulators snap a cable and drop the glass.

6. Check 06

   Try several cold and warm starts. An intermittent crank-no-start, a fuel pump that won't prime, or odd electrical gremlins point at the TIPM.

7. Check 07

   Crawl the frame, especially behind the rear wheels and at the rear crossmember — JK frames rust in salt states; check for perforation and bad past welds.

8. Check 08

   If lifted, ask for receipts. A lift done wrong is the #1 trigger for death wobble and a common reason a 'great deal' becomes a steering project.