Mitsubishi Outlander PHEV (GG)
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 severityThe 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.
Electric Heater Failure
medium severityThe electric water heater (used when the engine is off) frequently fails. A small inline gauze filter can also block, preventing circulation.
AC Compressor Failure (Wrong Oil)
high severityThe electric compressor requires specialized POE oil. Using standard PAG oil during a regas will destroy the internal motor.
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