Subaru Impreza Mk4 (GJ/GP)
The Mk4 trades old-school Subaru feel for comfort and efficiency. It is generally sensible to own, but this is the generation most linked with FB20 oil consumption and CVT sensitivity.
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Common Faults & Reliability
These are the most common documented problems for the Subaru Impreza Mk4 (GJ/GP), sorted by their typical impact and frequency.
Excessive Oil Consumption
medium severityEarly FB20 engines can use oil quickly enough to require frequent top-ups between services, and neglected low oil levels can lead to bigger engine wear.
Lineartronic CVT Valve Body Failure
high severityThe Mk4 Impreza’s CVT can suffer solenoid or valve body faults that show up as shunting, hesitation and warning-light clusters.
Air-Conditioning Condenser Damage
medium severityThe low-mounted condenser is vulnerable to stone damage and corrosion, leaving some cars with weak or completely failed air conditioning.
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