Parts for your 2006 Toyota Prius-Oil seals

2006 Toyota Prius oil seals — what they do and when to service them

Oil seals absolutely are used on the 2006 Toyota Prius (NHW20). Toyota’s factory Repair Manual for the 2004–2009 Prius, the Toyota Electronic Parts Catalogue (EPC), and Aisin’s hybrid transaxle documentation all show multiple oil seals fitted to this model — including the front and rear crankshaft seals, a camshaft seal, and hybrid transaxle shaft/drive shaft seals. They’re there to keep engine oil and transaxle fluid where they belong, and dust and water out.

On a 2006 Prius, oil seals do the quiet but critical job of controlling leaks at rotating shafts. The 1NZ-FXE petrol engine relies on a front crankshaft seal (behind the crank pulley) and a rear main seal (between engine and transaxle). The camshaft has a seal at the timing end, and the hybrid transaxle uses oil seals at the drive shafts (left and right) and other shafts to contain Toyota ATF WS. These are standard, serviceable items called out in Toyota’s EM (Engine Mechanical) and AX (Transaxle/Hybrid Transaxle) sections.

• Common Prius oil seals: front crankshaft, rear main, camshaft, hybrid transaxle drive shaft seals.
• Main purpose: prevent oil/ATF leaks and keep contaminants out, protecting bearings, chains, and gears.

Oil seals aren’t a scheduled replacement item