The 2017 Mirage is Mitsubishi's ultra-budget subcompact with a 1.2L 3-cylinder paired to a CVT or 5-speed manual. While mechanically simple and cheap to own, the CVT variants show premature transmission issues and the tiny engine can develop serious internal wear when maintenance lapses or heavy driving is involved.
CVT Transmission Overheating and Judder
Common · high severityTypical onset: 60,000-100,000 mi
Symptoms: shuddering during acceleration from stop, slipping feel under load, transmission overheating warning light, whining or grinding noises from transmission
Fix: CVT fluid and filter service may temporarily help if caught early (1.5 hrs), but most cases require transmission oil cooler replacement (2-3 hrs) or full CVT rebuild/replacement (8-12 hrs). Cooler lines corrode and restrict flow, cooking the CVT internally.
Estimated cost: $400-$5,500
Engine Internal Wear - Piston Rings and Bearings
Occasional · high severityTypical onset: 80,000-140,000 mi
Symptoms: excessive oil consumption (quart per 1,000 mi or worse), blue smoke from exhaust on startup or acceleration, knocking or ticking noises from engine block, loss of compression and power
Fix: The 1.2L 3-cylinder runs high RPMs for highway speeds and is intolerant of extended oil change intervals. Piston ring wear leads to oil burning; bearing wear leads to knocking. Repair requires engine teardown: piston ring replacement (10-12 hrs), full bearing set (12-14 hrs), or short block replacement (14-18 hrs). Many opt for used engine swap instead.
Estimated cost: $2,800-$6,500
Transmission Mount Failure
Common · medium severityTypical onset: 50,000-90,000 mi
Symptoms: clunking when shifting from park to drive, excessive vibration at idle, visible sagging or tearing of rubber mount, transmission feels like it moves excessively during acceleration
Fix: The rear transmission mount is undersized for the CVT's weight and vibration characteristics. Rubber separates from metal bracket or tears completely. Replacement is straightforward (1.5-2 hrs) but access requires lifting the transmission slightly.
Estimated cost: $200-$400
Head Gasket Failure (Both Cylinders 1 and 3)
Occasional · high severityTypical onset: 90,000-130,000 mi
Symptoms: coolant loss with no visible leaks, white smoke from exhaust, overheating under load, oil and coolant mixing (milky oil cap), rough idle and misfires
Fix: The 3-cylinder head gasket can fail between combustion chambers or into coolant passages, especially if the engine has overheated. Requires cylinder head removal, resurfacing, and gasket replacement (8-10 hrs). Often find warped head requiring machining or replacement.
Estimated cost: $1,800-$3,200
Headlight Lens Delamination and Moisture Intrusion
Common · low severitySymptoms: condensation inside headlight housing, cloudy or yellowed lens from inside, headlight bulbs burning out frequently, lens seal separating from housing
Fix: Factory headlight assemblies have poor seal quality. Moisture enters, causes corrosion and bulb failure. NHTSA recall addressed some units but many still fail. Aftermarket sealed assemblies are the fix (1 hr per side). Resealing existing units rarely lasts.
Estimated cost: $300-$600
Fuel Filter Clogging (Pre-Pump)
Occasional · medium severityTypical onset: 70,000-110,000 mi
Symptoms: hard starting after sitting, loss of power on highway, engine stumbling under acceleration, fuel pump whining loudly
Fix: The in-tank pre-pump strainer clogs with sediment, starving the high-pressure pump. Not a scheduled maintenance item but should be replaced with any fuel pump work. Requires tank drop (2-3 hrs). Can cause premature fuel pump failure if ignored.
Estimated cost: $350-$650
Buy the manual transmission version only, and plan on religious 5,000-mile oil changes — the CVT models are ticking time bombs, and the tiny engine doesn't tolerate deferred maintenance.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.