UK Reliability Directory

Mitsubishi Outlander PHEV (GG)

Production Years: 2014 - 20214 Documented Faults

The UK's best-selling plug-in hybrid for many years. It offers a practical family SUV experience with significant tax benefits for business users.

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Common Faults & Reliability

These are the most common documented problems for the Mitsubishi Outlander PHEV (GG), sorted by their typical impact and frequency.

Battery Degradation & "BMU Reset" Masking

high severity

The traction battery naturally loses capacity over time. A major concern is the "BMU Reset" where a technician or seller resets the Battery Management Unit, forcing it to report 100% health (State of Health). This "masks" the actual degradation until the car relearns the true capacity over several weeks.

Est. repair cost:£3,000–£7,000 (Replacement)

Electric Heater Failure

medium severity

The electric water heater (used when the engine is off) frequently fails. A small inline gauze filter can also block, preventing circulation.

Est. repair cost:£300–£1,000

AC Compressor Failure (Wrong Oil)

high severity

The electric compressor requires specialized POE oil. Using standard PAG oil during a regas will destroy the internal motor.

Est. repair cost:£1,000–£3,000
View All 4 Documented Issues

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