The 2017 i-MiEV is Mitsubishi's compliance-car electric hatchback with a 16 kWh battery pack and rear-mounted electric motor. Despite minimal sales and orphaned support, these are mechanically simple vehicles with surprisingly few catastrophic issues, though parts availability and specialty EV knowledge can be dealbreakers.
Battery Capacity Degradation
Common · medium severityTypical onset: 50,000-80,000 mi or 6-8 years
Symptoms: Reduced range from original 62 miles to 40-45 miles on full charge, Capacity gauge shows fewer bars than when new, Faster voltage drop under load or cold weather
Fix: Battery pack replacement is the only real fix; cells cannot be individually serviced economically. Mitsubishi discontinued pack production, so sourcing requires used units from salvage (~$3,000-5,000) or aftermarket refurbishment services. Labor is 6-8 hours to drop and replace the rear-mounted pack. Many owners just live with reduced range.
Estimated cost: $4,500-8,000
Front Differential Leaks and Bearing Noise
Occasional · medium severityTypical onset: 70,000-100,000 mi
Symptoms: Whining or grinding noise from front end during turns, Oil seepage around differential housing visible on inner CV joint area, Vibration at highway speeds if bearing preload is lost
Fix: Front diff shares design with gas-powered Mitsubishi platforms but see accelerated wear from instant EV torque. Full rebuild requires disassembly, new bearings, seals, and setup (~5-7 hours labor). Some techs opt for used replacement units due to parts scarcity. Not a breakdown risk immediately but gets expensive quickly.
Estimated cost: $1,200-2,200
Brake Booster Vacuum Pump Failure
Occasional · high severityTypical onset: 60,000-90,000 mi
Symptoms: Hard brake pedal requiring excessive foot pressure, Grinding or buzzing noise from under dash when braking, Warning light for brake system (linked to NHTSA recall 18V-355)
Fix: EVs lack engine vacuum, so electric pump provides booster assist. Pump motor or check valve fails, killing power assist. Recall addressed some units but not all; replacement pump is dealer-only part (~$600-800). Labor is 2-3 hours to access behind dash. Critical safety item—do not delay.
Estimated cost: $1,000-1,400
AC Evaporator and Expansion Valve Leaks
Occasional · low severityTypical onset: 80,000-120,000 mi
Symptoms: AC blows warm or intermittently cold, Oily residue on passenger footwell carpet, Refrigerant leak detected at evaporator core behind dash
Fix: Evaporator sits deep behind dashboard; replacement requires full dash removal (8-12 hours labor). Often the expansion valve (TXV) fails simultaneously. Parts are available but expensive due to low production volume. Many owners skip the repair and drive with windows down given the car's limited resale value.
Estimated cost: $1,800-3,200
12V Auxiliary Battery Failure
Common · medium severityTypical onset: 40,000-60,000 mi or 4-5 years
Symptoms: Vehicle won't enter 'Ready' mode despite charged traction battery, Accessories work but drivetrain won't engage, Clicking from contactors when start button pressed
Fix: Like all EVs, i-MiEV uses a small 12V lead-acid battery for computers and contactors. These die faster than in gas cars due to constant parasitic draw when parked. Replacement is simple (0.5 hours) but requires registration/programming at dealer for BMS to recognize new battery. Aftermarket batteries work but may throw dashboard warnings.
Estimated cost: $250-450
Charge Port Door Actuator and Lock Mechanism
Occasional · low severitySymptoms: Charge door won't unlock via interior button, Manual release cable breaks or detaches, Door sticks open or closed regardless of lock state
Fix: Plastic actuator arm and cable mechanism are fragile. Fails from corrosion (road salt) or repeated use cycles. Replacement actuator is dealer-only (~$200-300 part) with 1.5-2 hours labor to access through rear quarter trim. Can temporarily override with manual release, but exposing charge port to elements risks connector corrosion.
Estimated cost: $400-650
Buy only if you need a cheap urban runabout under 40 miles/day and have DIY skills or a trusted indie EV shop—parts scarcity and battery degradation make this a gamble for anyone else.
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.