The 2021 eK Wagon is Mitsubishi's kei-car city runabout with a 660cc three-cylinder engine. Built on a platform shared with Nissan (Dayz/Roox), these are generally reliable appliances but suffer from typical small-displacement turbo issues and CVT sensitivities when pushed hard or neglected.
CVT Transmission Overheating & Oil Cooler Failure
Common · high severityTypical onset: 50,000-80,000 mi
Symptoms: Juddering or hesitation during acceleration, especially from stops, Burning smell or dark/burnt CVT fluid, Transmission warning light or limp mode on hot days or sustained highway use, Whining noise that increases with engine RPM
Fix: CVT fluid and filter service is mandatory every 30k miles on these—many owners skip it. Cooler replacement involves dropping the transmission pan and often requires CVT fluid flush. Full CVT rebuild or replacement if damage has progressed. 3-6 hours labor for cooler/fluid service, 12-18 hours for CVT replacement.
Estimated cost: $600-1,200 for cooler and service; $3,500-5,500 for CVT replacement
Timing Chain Stretch & Guide Wear (BR06 Turbo)
Occasional · high severityTypical onset: 70,000-110,000 mi
Symptoms: Cold-start rattle lasting 3-5 seconds that gets progressively longer, Check engine light with cam/crank correlation codes (P0016, P0017), Rough idle or misfires during warmup, Metal shavings in oil filter during oil changes
Fix: The turbocharged BR06 uses a high-stress single timing chain setup. Stretched chains cause valve timing errors and eventual catastrophic failure if ignored. Requires chain, tensioner, guides, and both VVT sprockets. Often find oil pickup clogged with guide material. 8-10 hours labor.
Estimated cost: $1,800-2,800
Hydraulic Lifter Collapse & Camshaft Wear
Occasional · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Persistent valve train ticking or tapping, especially when hot, Loss of power or poor fuel economy, Engine misfires on specific cylinders, Rough running that worsens under load
Fix: Three-cylinder engines amplify any lifter noise. Oil neglect kills these hydraulic lifters fast—5k mile oil changes are critical. If caught early, lifter replacement alone works (6-7 hours), but worn cam lobes mean cylinder head R&R with cam and all lifters (12-14 hours). Always inspect cam journals for scoring.
Estimated cost: $1,200-1,800 lifters only; $2,500-3,800 with camshaft and head work
Harmonic Balancer Deterioration
Occasional · medium severityTypical onset: 60,000-90,000 mi
Symptoms: Vibration felt through steering wheel or floor at idle and 2,000-3,000 RPM, Serpentine belt throwing or excessive wear on one side, Visible rubber separation or wobble on crankshaft pulley, Squealing from accessory drive area
Fix: The rubber isolator in the harmonic balancer degrades from heat cycles in the tight engine bay. Once it separates, crankshaft harmonics damage bearings and accessories. Replacement is straightforward but requires special holding tools for the crank bolt. 2-3 hours labor.
Estimated cost: $400-700
Transmission Mounts Collapsing (Especially Turbo)
Common · low severityTypical onset: 40,000-70,000 mi
Symptoms: Clunk or thud when shifting from Park to Drive or Reverse, Excessive driveline vibration during acceleration, Engine appears to move excessively when revved in Park, Metallic knocking over bumps
Fix: The turbocharged models especially destroy the rear transmission mount from torque cycling. Fluid-filled mounts leak and collapse. Aftermarket replacements fail quickly—use OEM Mitsubishi or Nissan parts. 1.5-2 hours labor for mount replacement.
Estimated cost: $250-450
Head Gasket Failure (Overheating-Related)
Rare · high severityTypical onset: 80,000-130,000 mi
Symptoms: White smoke from exhaust, especially after long drives, Coolant loss with no visible leaks, Oil cap shows milky residue or mayonnaise-like emulsion, Overheating during spirited driving or heavy loads
Fix: Not common unless the CVT overheating issue caused repeated engine overheating. These aluminum heads warp easily. Head gasket replacement requires cylinder head machining/resurfacing. Always check for cracks under the valve seats. 10-14 hours labor including head R&R and machining.
Estimated cost: $2,200-3,500
Decent city car if meticulously maintained with short oil/CVT intervals, but avoid turbo models for longevity—naturally aspirated BR06 with religious fluid changes is the smart used buy under 60k 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.