The 2022 Mitsubishi eK X is a kei-car with a 0.66L turbocharged 3-cylinder (BR06) paired with a CVT. Being a recent model, most issues stem from the inherent fragility of highly-stressed tiny turbo engines and CVT durability, plus typical lightweight-platform vibration concerns.
CVT Transmission Oil Cooler Failure and Overheating
Occasional · high severityTypical onset: 40,000-70,000 mi
Symptoms: Transmission overheat warning light, Harsh shifts or slipping under load, Burnt CVT fluid smell, Limp mode activation in hot weather or uphill driving
Fix: Replace transmission oil cooler, flush CVT fluid completely, inspect for internal CVT damage. Labor is 3-4 hours due to cramped engine bay and cooler line routing.
Estimated cost: $800-1,400
Timing Chain Stretch and Tensioner Wear (BR06 Turbo)
Occasional · high severityTypical onset: 60,000-90,000 mi
Symptoms: Rattling noise on cold start, Check engine light with cam/crank correlation codes, Rough idle or misfires, Loss of power at higher RPM
Fix: Replace timing chain, tensioner, guides, and cam phasers. On this small turbo 3-cylinder, the chain is highly loaded and oil quality is critical. Labor is 6-8 hours including turbo and intake manifold removal for access.
Estimated cost: $1,800-2,800
Hydraulic Lifter Noise and Premature Wear
Common · medium severityTypical onset: 50,000-80,000 mi
Symptoms: Ticking or tapping noise from valve train, especially cold, Rough idle, Occasional misfire codes, Noise may decrease as engine warms up
Fix: Replace all hydraulic lifters and inspect camshaft lobes for wear. Common on turbo kei-cars due to high-revving operation and marginal oil flow. Cylinder head must be removed. Labor is 8-10 hours.
Estimated cost: $1,500-2,500
Transmission Mount Collapse
Common · low severityTypical onset: 30,000-60,000 mi
Symptoms: Excessive vibration at idle, Clunking when shifting D to R, Drivetrain lurch during acceleration, Visible sagging of transmission when inspected on lift
Fix: Replace transmission mount. Common on lightweight platforms with turbo torque spikes. Labor is 1.5-2 hours.
Estimated cost: $200-400
Turbocharger Wastegate Rattle and Boost Control Issues
Occasional · medium severityTypical onset: 50,000-80,000 mi
Symptoms: Rattling noise under acceleration, Check engine light with underboost or overboost codes, Reduced power output, Turbo whistle changes pitch or becomes louder
Fix: Replace turbocharger assembly or rebuild with new wastegate actuator. On these small turbos, carbon buildup and actuator linkage wear are common. Labor is 4-5 hours.
Estimated cost: $1,200-2,200
Cylinder Head Warping and Head Gasket Failure
Rare · high severityTypical onset: 70,000-100,000 mi
Symptoms: White smoke from exhaust, Coolant loss with no visible leaks, Overheating episodes, Rough running and misfires, Oil in coolant or coolant in oil
Fix: Remove cylinder head, resurface or replace, install new head gasket and bolts, inspect block deck. The BR06 runs high compression and turbo boost on a small aluminum head that can warp if overheated. Labor is 10-12 hours.
Estimated cost: $2,500-4,000
Fun, efficient kei-car but the turbo BR06 and CVT combo are fragile; buy used only with full service records and budget for transmission and timing chain work by 80k miles.
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.