Mitsubishi Outlander PHEV GF

The 12 kWh (pre-2019) or 13.8 kWh (2019+) lithium-ion drive battery gradually loses capacity. Forum reports show some 2014-2016 cars dropping to 65-75% state of health within 5-6 years, particularly when driven at sustained motorway speeds on EV mode (high discharge rates stress the small pack). Mitsubishi warrants the battery for 8 years / 160,000 km with a 65-70% capacity threshold depending on model year and country. If the battery drops below this threshold within warranty, Mitsubishi replaces it at no cost. Outside warranty, a replacement battery pack costs €5,000-8,000 at a dealer. Cell-replacement specialists offer refurbishment for €3,000-5,000. Before buying, request a battery health check from a Mitsubishi dealer showing the exact state of health percentage.

The Outlander PHEV uses a small 45 Ah AGM auxiliary battery (Yuasa S46B24L) located inside the cabin. This battery powers the vehicle's electronics and must be healthy for the PHEV system to operate. Owners commonly report the 12V battery dying every 2-3 years, particularly if the car is left standing for more than a week. A flat 12V battery triggers multiple dashboard warnings including EV system fault, ABS, and ASC errors. The DC-DC converter charges the 12V battery from the traction pack during driving, but parasitic draw from the WiFi module and alarm system depletes it when parked. Mitsubishi released a software update (TSB-24-54-002) to reduce standby power draw. Budget €150-300 for the specific AGM battery required, and consider keeping the car on a trickle charger if not driven daily.

The DC-DC converter steps down voltage from the traction battery to charge the 12V system. When it fails, the car may display a charging fault message, enter limp mode, and eventually shut down completely. Forum reports indicate this is a relatively uncommon but expensive failure. One documented repair on a 2017 model cost over €5,000 including parts and labour. The replacement part alone retails around €3,500. Wait times for parts from Japan can extend to several months. This failure is rare on well-maintained vehicles but becomes more likely as cars age beyond 8-10 years.

The Outlander PHEV uses an electrically driven AC compressor rather than a conventional belt-driven unit. This compressor handles both cabin cooling and battery thermal management, making it critical for the PHEV system. When it fails, the car cannot charge the battery or run in EV mode. Mitsubishi dealer quotes for replacement range from €3,500-5,000. Independent specialists can sometimes source used or aftermarket compressors for €800-1,500 plus installation. Important: never use DIY refrigerant top-up kits, as incorrect oil types will damage the electric compressor windings. This failure is uncommon but occurs more often in hot climates.

The rear electric motor mount uses a rubber bush that wears out faster than expected, sometimes as early as 20,000 km. Symptoms include a noticeable clunk when transitioning between drive and regeneration, vibration under acceleration, and increased drivetrain movement when engaging drive or reverse. The OEM bush (part number 3517A053) costs around €50-80. Aftermarket polyurethane bushes from Powerflex or Polybush cost €30-50 and last longer. Labour is minimal as the bush is relatively accessible. Mitsubishi typically classifies this as wear and tear rather than a warranty defect.

A braided earth strap connecting the vehicle body to the rear axle can corrode, become brittle, and fracture. When this happens, the car throws multiple confusing error messages including EV system service required, ABS faults, and RBS warnings. The fix is simple and cheap: a replacement strap costs under €10 and takes minutes to fit. The challenge is diagnosis, as the wide variety of fault codes can initially point technicians toward expensive components. Check the earth strap visually before any expensive electrical diagnosis. It appears as a green braided cord underneath the boot area.

When the rear motor control unit fails, the car displays EV system service required and ACC system service required warnings. The vehicle may only operate on the front electric motor with reduced acceleration. One documented repair cost approximately €2,800 including fitting, with Mitsubishi contributing 10% of the part cost as a goodwill gesture. Parts can take 2-3 months to arrive from Japan. This is a rare failure but worth noting as it eliminates AWD capability until repaired.

The large charging port flap has a known design weakness in its spring clip mechanism, particularly on pre-2016 models. When the clip breaks, the flap hangs loose and scrapes against the bodywork when opened. Mitsubishi redesigned the flap assembly for 2016 models with improved clips and a stiffer door. Replacement of the flap mechanism costs €100-200. If bodywork paint damage has occurred from the loose flap, touch-up or paintwork repair can add €200-400. Some dealers have disputed warranty claims, classifying the damage as customer misuse.