2004 SUBARU Legacy EZ30D/EJ253 (BL/BP)

Engine identity

Oils and fluids

Service and parts data

Common and chronic problems

• Head gasket issues on EJ25 engines
• Timing belt replacement critical at recommended intervals
• Oil consumption noted in some turbocharged variants

First checks

• Verify timing belt condition and replacement history
• Inspect for oil leaks and head gasket integrity
• Check transmission type for service procedures

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

• Subaru Legacy 2004 models had engine and spec variations by market; the EJ series inline-fours dominated outside Japan, with the EZ30D flat-six primarily in Japan and select regions.
• Oil capacity and service procedures depend on engine variant; always confirm with vehicle-specific documentation.