2020 MITSUBISHI MIRAGE

Typical onset: 70,000-110,000 mi

Symptoms: Transmission overheating warnings or limp mode, CVT fluid contamination with coolant (milky fluid), Transmission shudder or slipping after warm-up, Coolant loss with no external leaks

Fix: Replace CVT oil cooler and flush both transmission and cooling system. Requires removing front bumper and radiator support. 4-6 hours labor depending on cooler type (internal vs external). If caught late, CVT itself may need replacement.

Estimated cost: $800-1,500 for cooler alone, $3,500-5,000 if CVT is damaged

Typical onset: 60,000-90,000 mi

Symptoms: Excessive engine/trans movement on acceleration or braking, Clunking when shifting from park to drive, Vibration at idle that worsens over time, Visible sag or cracking in rubber mount

Fix: Replace front and/or rear transmission mount. The lightweight engine and CVT create high-frequency vibrations that fatigue mounts faster than typical. 1.5-2.5 hours labor.

Estimated cost: $200-400

Typical onset: 80,000-140,000 mi

Symptoms: Excessive oil consumption (1 qt per 1,000-2,000 mi), Blue smoke on startup or acceleration, Fouled spark plugs, Loss of power and rough idle, Carbon buildup visible in intake

Fix: This 1.2L runs high compression on thin rings to meet fuel economy targets. Extended oil change intervals or low-quality oil accelerate ring wear. Requires engine teardown and ring replacement at minimum; many shops recommend short block replacement given labor overlap. 12-16 hours for rings only, 14-18 hours for short block.

Estimated cost: $2,500-3,800 for rings/pistons, $4,000-6,500 for short block

Typical onset: null

Symptoms: Coolant loss with white exhaust smoke, Overheating after CVT cooler failure or cooling system neglect, Rough idle and misfires, Oil contamination with coolant (tan/milky on dipstick)

Fix: Usually secondary to cooling system failure (see CVT cooler issue). The aluminum head warps easily if overheated. Requires head removal, resurfacing, and new gasket. 8-10 hours labor. Check for cylinder bore damage before reassembly.

Estimated cost: $1,800-2,800

Typical onset: 50,000-80,000 mi

Symptoms: Hard starting or extended cranking, Loss of power under load or at highway speeds, Intermittent stalling, Check engine light with fuel trim codes

Fix: In-tank fuel filter not listed in standard maintenance schedule but clogs in areas with poor fuel quality. Requires fuel tank drop and pump module R&R. 2-3 hours labor.

Estimated cost: $250-450

Typical onset: 100,000-150,000 mi

Symptoms: Knocking or rattling from lower engine on cold start, Noise increases with RPM and load, Low oil pressure warnings, Metallic debris in oil filter

Fix: Bearing clearances are tight on this engine; oil starvation from sludge buildup or extended intervals causes premature wear. Requires crankshaft inspection and bearing replacement, often escalates to full rebuild. 14-20 hours for bearing replacement, assumes crank is reusable.

Estimated cost: $3,000-5,500