Parts for your 2005 Subaru Legacy-Exhaust mount

2005 Subaru Legacy exhaust-mount: what it does and when to replace it

Exhaust mounts are absolutely used on the 2005 Subaru Legacy. The Subaru Factory Service Manual for 2005 Legacy/Outback (Exhaust section) details multiple rubber insulators supporting the front pipe, centre section and rear muffler/s, and the Subaru Genuine Parts Catalogue for MY2005 Legacy/Outback lists these hangers as serviceable items. Together, those technical sources confirm the car relies on exhaust mounts to suspend and locate the exhaust system under the body.

On this model, the exhaust mounts (also called hangers or insulators) are tough rubber donuts and brackets that hold the exhaust at the correct height and angle. They isolate vibration, stop knocks against the subframe and body, and let the system move slightly as the engine rocks and the pipework heats and cools. If they harden, crack or stretch, the exhaust can droop, rattle over bumps, or thump on take-off.

As part of routine servicing on a 2005 Subaru Legacy, it’s smart to inspect the mounts any time the car’s on a hoist—especially if there’s a new rattle after a kerb strike or a recent exhaust repair. A quick look for perishing, tearing, ovalled holes, or excessive sag will usually tell the story. In coastal or rural NZ/Aus conditions, the rubber and metal brackets can cop it from salt and mud, so periodic checks pay off.

• Common symptoms of tired mounts: tinny rattles at idle, clunking over speed humps, a tailpipe sitting off-centre, or visible cracks in the rubber.
• Left too long, failed mounts can stress welds, crack flanges, or damage oxygen sensor wiring due to extra movement.

1. Let the exhaust cool fully, then support it with a stand before removing any mounts.
2. Spray silicone or soapy water on the rubber to slide it off the pegs without tearing.
3. Replace in pairs where possible to keep height even, use new bracket hardware if rusty.
4. Choose quality OEM-style rubber for factory comfort, or stiffer polyurethane if a firmer, sportier feel is acceptable—note it may add a touch of NVH.
5. After fitment, check tailpipe alignment in the bumper cut-out and confirm there’s clearance to heat shields, subframe and sway bar.

There’s no strict kilometre interval, but many owners see 8–12 years from OEM rubbers. If the Legacy gets regular short trips or tows, expect to replace mounts sooner.

How many exhaust mounts does a 2005 Subaru Legacy have?

Most variants run four to six rubber insulators in total. Single-muffler models typically have one near the front pipe, one to two along the mid-section, and one to two at the rear muffler. Dual-muffler variants add extra rear hangers. Always check under the specific car, as trim level and market spec can differ.

Is it OK to drive with a broken exhaust mount?

It’ll often still move under its own steam, but it’s not a good idea. A missing or torn mount can let the system swing and hit the body, damage welds, or strain oxygen sensor leads. Replacing the faulty mount promptly avoids bigger bills and annoying noises.

Should they use OEM or aftermarket polyurethane mounts?

OEM-style rubber keeps the factory refinement and is perfect for daily use. Polyurethane mounts last longer and hold the system firmer, which can be great on performance setups, but they can add a little vibration. For a stock 2005 Legacy, quality OEM rubber is usually the sweet spot.