2002–2007 JEEP LIBERTY

Typical onset: 80,000-150,000 mi

Symptoms: Coolant loss with no visible external leaks, White smoke from exhaust on cold starts, Overheating even after thermostat/radiator replacement, Milky oil or coolant in oil—often too late when you see this

Fix: The 3.7L PowerTech heads crack between cylinders 3-4 and 5-6, allowing coolant into the cylinders. Machine shops won't warranty these heads even after resurfacing. Most owners end up needing a complete engine replacement—either reman long-block or junkyard motor. Labor is 18-24 hours for full R&R including coolant, timing components, gaskets, fluids.

Estimated cost: $3,500-6,500

Typical onset: 60,000-100,000 mi

Symptoms: Clunking over bumps from front suspension, Wandering steering or excessive play, Visible grease boot tears on ball joints, In worst cases: complete wheel collapse while driving

Fix: Factory ball joints are pressed into the lower control arms and fail catastrophically—NHTSA investigated this twice. You cannot replace just the ball joint; entire lower control arm assembly required on each side. This is a safety-critical repair. Plan on 3-4 hours for both sides including alignment.

Estimated cost: $600-1,000

Typical onset: 70,000-120,000 mi

Symptoms: Transmission fluid puddle under vehicle center-front, Pink fluid mixed with coolant in overflow tank, Sudden transmission overheating or slipping, Milky pink transmission fluid on dipstick

Fix: The cooler lines rot from the inside out where they connect to the radiator, or the cooler itself fails inside the radiator, cross-contaminating coolant and ATF. Either scenario destroys the transmission if not caught immediately. Requires radiator replacement, new cooler lines, complete trans fluid flush (if you're lucky), or full transmission rebuild if coolant got into the valve body. 4-6 hours for lines/radiator; add 12-18 hours if trans is damaged.

Estimated cost: $800-1,200 (cooler/lines only); $2,500-4,000 (with trans rebuild)

Symptoms: Rear liftgate window won't latch closed, Window rattles or pops open while driving, Latch mechanism feels loose or won't engage

Fix: The rear window latch assembly is plastic and fractures internally. Window just won't stay shut. Replacement latch assembly takes about 1 hour. This was subject to recalls but many vehicles still have the faulty part installed.

Estimated cost: $200-350

Typical onset: 80,000-140,000 mi

Symptoms: Death wobble—violent shaking of entire front end at 45-55 mph, Steering wheel off-center after hitting bumps, Clunking from front axle area over bumps

Fix: Track bar bushings wear out or the frame-side bracket cracks. Death wobble can also be caused by worn ball joints, tie rod ends, or steering stabilizer, but track bar is the most common culprit on these. Replacing track bar and inspecting related components takes 2-3 hours. Often requires alignment afterward.

Estimated cost: $400-700

Symptoms: Rust perforation visible on fuel tank skid plate, Fuel smell or small leaks from tank area, Rattling from underneath vehicle, In severe cases: fuel tank drooping or strap breakage

Fix: Salt-belt Libertys see the skid plate and straps rust through, especially if the skid plate traps moisture against the tank. Requires dropping the tank, replacing straps and hardware, sometimes the skid plate itself. 3-4 hours labor. Inspect this during any undercarriage work.

Estimated cost: $300-600