Parts for your 2003 Subaru Impreza-Oil seals

2003 Subaru Impreza oil seals: what they do, why they matter, and when to replace

Oil seals are absolutely fitted and relevant on the 2003 Subaru Impreza. The Subaru Factory Service Manual for the 2002–2003 Impreza (EJ-series engines), Subaru FAST electronic parts catalogue, and independent workshop manuals all detail front and rear crankshaft seals, camshaft seals, oil pump seals/O-rings, and transmission/differential axle oil seals for this model. These components are standard across EJ20/EJ25 engines and the 5-speed manual or 4EAT automatic drivetrains used in 2003.

On this Impreza, oil seals keep engine and drivetrain lubricants where they belong while excluding dust and moisture. They’re small, but they’re crucial for long engine and gearbox life, tidy servicing, and keeping the driveway clean.

• Front and rear crankshaft seals: keep engine oil in at the crank nose and flywheel/flex-plate end.
• Camshaft seals: sit behind the timing covers