Parts for your 2018 Toyota Prius-Oil seals

2018 Toyota Prius oil-seals: what they do, where they are, and when to sort them out

Based on Toyota’s own technical literature — the Prius ZVW50 Series Repair Manual (TIS) and New Car Features, plus the Toyota Electronic Parts Catalogue — the 2018 Toyota Prius absolutely uses oil-seals. They’re fitted to the 2ZR-FXE engine (crankshaft and cam areas) and the hybrid transaxle/eCVT (drive-shaft/axle seals and other rotating shafts). So oil-seals are very much relevant on this model.

On a 2018 Prius, oil-seals keep engine oil and ATF WS where they belong and stop dust and moisture getting in. Up front there’s a crankshaft front seal behind the harmonic balancer, and at the back a rear main seal between engine and transaxle. The hybrid transaxle has oil-seals around the drive shafts to keep the ATF WS inside the case. Even with Toyota’s clever stop–start strategy, seals still face heat cycles, pressure changes and time-related hardening.

They aren’t a scheduled replacement item