Parts for your 2009 Toyota Prius-Exhaust gasket

2009 Toyota Prius exhaust gasket — what it is, where it sits, and when to replace it

Yes — the 2009 Toyota Prius (NHW20, 1NZ‑FXE) uses exhaust gaskets. This is shown in the Toyota Repair Manual (TIS) for NHW20 in the Exhaust section, which specifies replacing the exhaust pipe gasket whenever the front pipe is removed, and in Toyota’s Electronic Parts Catalogue (EPC), which lists a cylinder head–to–exhaust manifold gasket and exhaust pipe flange/donut gaskets for this model. General service guides (e.g. Haynes Prius 2001–2012) also treat these gaskets as standard service parts.

On this Prius, exhaust gaskets seal the joins between the cylinder head and exhaust manifold, and at the flanged joints in the front pipe and muffler. Their job is to keep the system gas‑tight, so engine management gets clean readings from the oxygen sensors, the cabin stays quiet and fume‑free, and performance and fuel economy aren’t nicked by leaks.

As a rule, exhaust gaskets aren’t a routine interval item in Australia or New Zealand