2004 SUBARU Impreza EJ205/EJ20 (GD/GG)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Head gasket failures in some EJ engines
• Oil consumption on turbo variants
• Worn suspension bushings

First checks

• Confirm timing belt service history
• Check for oil leaks around head gaskets
• Inspect CV boots and suspension components

Avant de remplacer des pièces

• Save fault codes and freeze-frame data before clearing anything.
• Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
• Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.

Important notes

• Multiple engine and trim variations exist globally; turbocharged WRX mainly for select markets like Japan, US, and Europe.
• Oil capacities and other specs may slightly vary depending on engine and market-specific tuning.