2009 FORD MUSTANG

Typical onset: 80,000-150,000 mi

Symptoms: excessive oil consumption (1 qt per 1,000 mi or worse), white/blue smoke on startup, loss of compression, catastrophic knocking if run low on oil, check engine light with misfire codes

Fix: Two-piece piston design with inadequate ring land support causes premature wear and eventual failure. Requires complete engine rebuild or short block replacement. 18-25 labor hours for short block swap, more if machine work needed. Many owners discover damage too late after running low on oil.

Estimated cost: $4,500-8,000

Typical onset: 60,000-120,000 mi

Symptoms: transmission fluid leaking near radiator, pink fluid pooling under car, transmission overheating, harsh shifting or slipping, milkshake-looking fluid (cooler rupture mixing coolant and ATF)

Fix: Factory crimped cooler lines corrode and leak, or internal cooler in radiator ruptures allowing coolant/ATF cross-contamination. External line replacement is 2-3 hours; internal rupture requires radiator replacement plus complete transmission flush or rebuild if contamination occurred. Contaminated trans is often a total loss.

Estimated cost: $300-600 (lines only), $2,500-4,500 (if trans contaminated)

Typical onset: 70,000-110,000 mi

Symptoms: harsh clunk when shifting into drive/reverse, excessive driveline vibration, visible transmission sag when inspecting from below, clunking over bumps

Fix: Rear transmission mount rubber deteriorates and tears, especially on V8 models with higher torque. Allows excessive drivetrain movement. Replacement is straightforward: 1.5-2 hours on a lift. Upgraded polyurethane mounts available and recommended.

Estimated cost: $200-400

Typical onset: 50,000-90,000 mi

Symptoms: coolant loss with no visible leak, white smoke from exhaust, overheating, rough idle, coolant in oil or oil in coolant

Fix: GT500 5.4L engines prone to head gasket failure, often between cylinders or into coolant passages. Requires heads-off work: 14-18 hours labor. Must check for head warpage and address supercharger bearing condition while apart. Not cheap on this platform.

Estimated cost: $3,500-5,500

Symptoms: hesitation under hard acceleration, loss of power above 4,000 RPM, stumbling when fuel tank below 1/4, lean fuel trims on scanner

Fix: In-tank fuel filter/pump sock clogs on vehicles driven hard or with poor fuel quality history. Requires fuel tank drop: 2-3 hours. Often discovered during diagnosis of drivability issues. Not a scheduled maintenance item in owner's manual but should be.

Estimated cost: $350-600

Symptoms: recall notice received, no symptoms until deployment, risk of metal shrapnel on airbag deployment

Fix: NHTSA recalls for passenger and driver airbag inflators that can rupture violently. This is a safety-critical recall. Verify completion before purchase — Ford replaces inflators free at dealers. 1-2 hours per side. Non-negotiable.

Estimated cost: $0 (recall work)