Parts for your 2003 Toyota Crown-Oil seals

2003 Toyota Crown oil seals — what they do and when to replace them

Oil seals are absolutely used on the 2003 Toyota Crown (S180 series — GRS18x and UZS18x). Technical references including the Toyota Electronic Parts Catalogue (EPC), the Crown S180 Repair Manual for the GR and UZ engines, and Aisin automatic transmission service data all list multiple factory oil seals: crankshaft front and rear main seals, camshaft seals, transmission input/output shaft seals, differential side (axle) seals and a rear pinion seal. These components are integral to the engine, gearbox and differential, so they’re very much relevant to servicing this model.

On a 2003 Crown, oil seals keep engine oil, ATF and diff oil where they belong while keeping dust and water out. Up front, the crank seal sits behind the harmonic balancer