2012 MITSUBISHI ECLIPSE

Typical onset: 60,000-120,000 mi

Symptoms: Blue smoke on startup or acceleration, Oil level drops 1+ quart between changes, Rough idle and misfires, Fouled spark plugs, Check engine light with P0300-P0304 codes

Fix: Mitsubishi's 2.4L World Engine has design flaws causing piston ring land failure and cylinder wall scoring. Requires complete engine rebuild with new pistons, rings, and often cylinder honing or bore/sleeve. 18-24 labor hours for proper rebuild, or 12-16 hours for used engine swap.

Estimated cost: $3,500-6,500

Typical onset: 70,000-110,000 mi

Symptoms: Transmission fluid puddles under vehicle, Pink or red fluid dripping near radiator, Transmission slipping or harsh shifts, Overheating transmission warning, Coolant contaminated with ATF (milky appearance)

Fix: Factory steel cooler lines rust through where they connect to radiator, and internal cooler in radiator can fail causing cross-contamination. Requires cooler line replacement, often radiator replacement if contamination occurred, plus full transmission fluid flush. 3-5 hours labor if caught early; 8-12 hours if transmission damaged from contamination.

Estimated cost: $600-1,200 (lines only), $2,500-4,000 (with transmission damage)

Typical onset: 80,000-130,000 mi

Symptoms: Excessive engine movement during acceleration, Clunking when shifting from Park to Drive, Vibration at idle in gear, Visible torn rubber on mount inspection, Transmission shift linkage misalignment

Fix: The rear transmission mount deteriorates from heat and stress, particularly on V6 models. Replacement requires supporting transmission and removing crossmember. 1.5-2.5 hours labor.

Estimated cost: $250-450

Typical onset: 90,000-140,000 mi

Symptoms: Deep knocking noise from bottom of engine, Noise worsens under load and with RPM, Low oil pressure warning, Metal shavings in oil, Engine vibration

Fix: Often caused by combination of oil consumption issues leading to low oil levels and insufficient lubrication. Requires full engine teardown, crankshaft inspection/machining, and new main bearings. Often discovered during diagnosis for knock. 20-26 hours labor for complete repair, though many opt for used engine replacement at this point.

Estimated cost: $4,000-7,000

Typical onset: 100,000-150,000 mi

Symptoms: Coolant loss without visible leaks, White smoke from exhaust, Overheating, Milky oil cap residue, Bubbles in coolant reservoir, Rough cold starts

Fix: The 2.4L is prone to head gasket failure, often exacerbated by overheating from cooling system neglect. Requires head removal, machining if warped, new gasket set, timing belt replacement while apart. 10-14 hours labor for single bank.

Estimated cost: $1,800-2,800

Symptoms: Loss of power under load, Hard starting after sitting, Sputtering at highway speeds, Stalling when fuel tank below 1/4, Check engine light with lean codes (P0171/P0174)

Fix: In-tank fuel filter/strainer clogs from sediment, especially in vehicles that ran low on fuel frequently. Requires fuel tank drop and pump assembly service. 2.5-3.5 hours labor.

Estimated cost: $400-650

Typical onset: 90,000-140,000 mi

Symptoms: Battery warning light, Dimming lights, Electrical accessories malfunctioning, Battery repeatedly dying, Whining noise from alternator pulley

Fix: Mitsubishi alternators on this platform have marginal longevity. Replacement is straightforward but requires serpentine belt removal. 1.5-2 hours labor.

Estimated cost: $450-700