2006 MITSUBISHI ECLIPSE

Typical onset: 80,000-130,000 mi

Symptoms: Harsh shifting between 2nd and 3rd gear, Slipping under acceleration, especially when warm, Delayed engagement into Drive or Reverse, Burnt transmission fluid smell, Transmission overheating warning light

Fix: The 4-speed auto paired with the V6 is severely undersized and overheats under normal driving. Cooler lines crack, fluid degrades rapidly, and clutch packs burn out. Rebuild requires 12-16 hours; most shops recommend replacement with a remanufactured unit. External cooler upgrade is mandatory to prevent repeat failure.

Estimated cost: $2,800-4,500

Typical onset: 90,000-150,000 mi

Symptoms: Metallic knocking noise from lower engine, worse when cold, Low oil pressure warning at idle, Metal shavings in oil during changes, Sudden catastrophic engine seizure in severe cases

Fix: The 6G75 V6 has marginal oil passages to rod and main bearings. Owners who stretch oil changes or use low-quality oil see bearing failure. Rod knock means short block replacement or full rebuild—crank needs machining, all bearings replaced. Labor runs 18-24 hours for proper rebuild.

Estimated cost: $4,500-7,000

Typical onset: 60,000-100,000 mi

Symptoms: Brake pedal slowly sinks to floor when held at stops, Spongy pedal feel after sitting overnight, No visible external fluid leaks but reservoir level drops, ABS light may illuminate intermittently

Fix: Internal seals in the master cylinder fail, allowing brake fluid to bypass internally. There was a recall (09V-372) but many units still fail post-repair. Replacement master cylinder plus full system bleed takes 2-3 hours. Must use DOT 3 fluid and bleed ABS unit properly.

Estimated cost: $400-650

Typical onset: 110,000-160,000 mi

Symptoms: White smoke from exhaust on cold starts, Coolant loss with no visible leaks, Oil looks milky or has coolant mixed in, Engine overheating under load, Rough idle and misfires when warmed up

Fix: The 4G69 MIVEC engine runs hot and can blow head gaskets, especially if coolant maintenance is neglected. Both head and block deck surfaces need machining. Job requires 8-12 hours, includes timing belt replacement while apart. Always replace timing components, water pump, and thermostat at same time.

Estimated cost: $1,800-2,800

Typical onset: 70,000-110,000 mi

Symptoms: Clunking noise over bumps from front end, Steering wheel doesn't return to center smoothly, Popping sound when turning at low speeds, Uneven tire wear on inside edges

Fix: The upper strut mount bearings wear out and seize, creating noise and poor handling. Often misdiagnosed as bad struts. Replace both front mounts with bearings—requires spring compressor. 2.5-3.5 hours labor. Do alignment immediately after.

Estimated cost: $450-700

Symptoms: Fuel pump nozzle clicks off repeatedly when tank is half full, Slow fill times at gas station, Fuel smell in cabin after filling up, Check engine light with EVAP system codes

Fix: Rollover valve in tank gets clogged with debris or corrosion. There was recall 06V-266 for tank assembly but valve still fails. Tank must be dropped to access, 3-4 hours labor. Sometimes entire EVAP canister assembly needs replacement if valve can't be cleared.

Estimated cost: $350-600

Typical onset: 85,000-130,000 mi

Symptoms: Battery light flickers or stays on, Dimming headlights at idle, Electrical accessories cutting in and out, Voltage gauge reads low (below 13V) or overcharges (above 15V), Battery repeatedly dies even when new

Fix: Mitsubishi alternators from this era have poor internal voltage regulators that fail, causing undercharge or overcharge conditions. Overcharging kills the battery and can fry the ECU. Replacement takes 1.5-2 hours on the I4, 2-3 hours on V6 due to tight engine bay. Use quality remanufactured unit, test charging voltage immediately after install.

Estimated cost: $450-750