Parts for your 2005 Holden Commodore-Exhaust mount

2005 Holden Commodore exhaust mount

Based on technical references including the Holden VZ Commodore Service Manual (Exhaust System section), the GM Holden Electronic Parts Catalogue for the VZ series (2004–2006), and common aftermarket catalogues from brands such as Mackay and Kelpro listing “exhaust mount/hanger insulators” for VT–VZ, the 2005 Holden Commodore is fitted with exhaust mounts. They’re relevant components and form part of the factory exhaust support system.

The 2005 Commodore relies on a series of rubber exhaust mounts (also called hangers or insulators) to suspend the exhaust from the body without transferring harsh vibration into the cabin. Each mount cradles or pegs through the exhaust brackets and corresponding body hooks, letting the system move slightly as the engine torques and the car flexes, while keeping the mufflers and pipework sitting at the correct height. That small bit of compliant movement is what prevents bangs, rattles and droning that can otherwise make a daily drive feel rough as guts.

Because these mounts live under the car, they cop heat, road grime and the odd splash of oil or coolant. Over time the rubber perishes, hardens or tears, and the exhaust can sag or knock on the floorpan, crossmember or rear bar. For that reason, it’s smart for any workshop servicing a 2005 Commodore to check the condition of the exhaust mounts at each service interval. There’s no strict kilometre change-out, but once cracks appear, the rubber feels chalky, or the tailpipe looks off-centre, replacement is on the cards.

Replacement is straightforward with the exhaust safely supported. A dab of silicone spray helps slide the old mount off the pegs. Fresh OEM-style rubber keeps things quiet and comfy, performance-minded owners may choose polyurethane, noting it can add a touch more NVH. It’s also worth inspecting all exhaust brackets for bent tabs, checking clearances around the diff, heat shields and spare-wheel well, and confirming the rear muffler sits even in the bumper cut-out. After refitting, a quick shake test and a short road check for knocks or new vibrations is the go.

• Typical symptoms: thuds over bumps, metallic rattles at idle, visible sagging tailpipe, new cabin vibration.
• Service tip: avoid getting oil on new mounts, petroleum shortens rubber life.
• Safety: always support the exhaust before removing any mount.

FAQs

How many exhaust mounts does a 2005 Holden Commodore have?
Most VZ Commodore sedans and wagons use multiple mounts from the mid-pipe to the rear muffler, typically two to four depending on engine, body style and exhaust configuration. Aftermarket systems may add or relocate mounts to suit larger pipework or different mufflers.

What are the signs an exhaust mount needs replacing?
Common giveaways include a droopy tailpipe, a clunk or rattle over bumps, or a buzz at idle as the system taps the body. Visual cracks, torn rubber or shiny rub marks on nearby panels are also tell-tales.

Is it okay to keep driving with a broken exhaust mount?
It’ll usually still drive, but the exhaust can shift and strike the floor or suspension, potentially damaging the system or heat shields. Replacing the failed mount promptly avoids bigger headaches and keeps the ride civil.