Parts for your 2005 Toyota Prius-Oil seals

2005 Toyota Prius Oil Seals — What They Do and When to Replace

Oil seals are absolutely relevant on the 2005 Toyota Prius (NHW20). Technical sources including the Toyota Repair Manual for 2004–2009 Prius (Engine Mechanical and Hybrid Transaxle sections), Toyota New Car Features for NHW20, and Toyota’s Electronic Parts Catalogue all show multiple seals fitted: front and rear crankshaft oil seals on the 1NZ-FXE engine, camshaft and timing cover sealing interfaces, plus left/right driveshaft (differential side) oil seals on the hybrid transaxle using Toyota ATF WS.

On this Prius, oil seals keep engine oil and transaxle fluid where they should be while blocking dust and water. Up front, the crankshaft seal sits behind the crank pulley