Parts for your 2005 Toyota Prius-Exhaust mount

2005 Toyota Prius Exhaust Mounts

Exhaust mounts are absolutely used on the 2005 Toyota Prius (NHW20). Technical references that confirm this include Toyota’s factory Repair Manual (TIS) for the 2004–2009 Prius, which details removal/installation of the exhaust pipe and its rubber support insulators, and the Toyota Electronic Parts Catalog (EPC), which lists “insulator, exhaust pipe” for this model. Independent manuals such as the Haynes guide for 2001–2008 Prius also call out inspection of the exhaust rubber mountings.

On this hybrid, the exhaust mounts (rubber insulators/hangers) suspend the centre pipe and rear muffler, keeping the system aligned while isolating vibration from the cabin. They help prevent the pipework from knocking on the underbody, protect the catalytic converter and oxygen sensors from undue stress, and maintain correct tailpipe position. Because the Prius engine cycles on and off in traffic, those start–stop vibrations and heat cycles put the mounts to work more often than many expect.

For servicing, they’re a simple but important check. At regular services (every 10,000–15,000 kilometres, or in line with local schedules), the mounts should be inspected for cracking, hardening, elongation, or tearing. The metal hangers welded to the exhaust and body brackets should be checked for corrosion, and clearances around heat shields verified. Coastal Aussie and Kiwi conditions, lots of short trips, and older age can age the rubber faster.

• Typical symptoms of tired mounts: a droopy muffler, thumps over bumps, a metallic rattle at idle or when the engine kicks in, or an off-centre tailpipe.

Replacement is straightforward and affordable. Support the exhaust with a stand, then unhook the old rubbers. A spritz of silicone spray helps slide the insulators off and on. It’s smart to choose OEM or OE-equivalent rubber to keep the Prius’s quiet character and correct exhaust geometry. If one mount in a section has failed, replacing its neighbour can save a return visit. After refitting, confirm the exhaust sits square, with even clearance from shields and the bumper, and recheck any fasteners that were loosened.

1. Work only on a cool exhaust and use stands on solid ground.
2. Inspect all mounts along the centre pipe and rear muffler together.
3. Verify no contact with shields, crossmembers, or the rear bumper after the swap.

Look after the mounts and the Prius stays quiet, tidy, and rattle-free for the long haul.

Popular questions about 2005 Toyota Prius exhaust mounts

How many exhaust mounts are on a 2005 Prius?
Most 2005 Prius cars run three to four rubber insulators supporting the centre pipe and rear muffler, depending on market and exhaust option. The exact count may vary slightly with production changes, but there’s always at least one at the centre and multiple at the rear muffler to hold alignment.

How often should the exhaust mounts be replaced?
There’s no fixed interval. They’re a “replace on condition” item. Many last 8–15 years, but climate, road conditions, and short-trip driving can shorten that. A quick check at every service is best, replace any mount that’s cracked, hardened, stretched, or letting the muffler sit off-centre.

Can universal exhaust hangers be used on a Prius?
Yes, quality universal hangers can work if the dimensions match the studs and the thickness suits the load. For the quietest ride and proper system geometry, OEM or OE-spec rubber is recommended, especially on a hybrid where NVH control matters.