Parts for your 2015 Holden Commodore-Exhaust mount

2015 Holden Commodore exhaust mount — what it does and how to look after it

Exhaust mounts (also called exhaust hangers or insulators) are absolutely used on the 2015 Holden Commodore. This is documented in Holden/GM Service Information for the VF Commodore (Workshop Manual, Exhaust System section) which shows the rubber insulators and bracket locations, and is backed by Holden Genuine/ACDelco parts catalogues listing “insulator, exhaust system” for VF models. Major aftermarket catalogues (e.g., Mackay Rubber and Walker Exhaust) also list direct-fit hangers for the 2013–2017 VF range.

On a 2015 Commodore, the exhaust mounts are the quiet heroes that hold the exhaust up under the car while soaking up vibration and movement. They’re rubber insulators that slide over metal pegs on the chassis and exhaust, letting the system “float” a touch. That bit of give keeps knocks and rattles out of the cabin, allows for expansion as the pipes heat up, and maintains safe clearance from the floor, subframe, and rear bumper — whether it’s a V6 or a V8 with a bi‑modal system.

As part of regular servicing, it’s smart to eyeball the mounts for perishing, splits, sagging, or elongated holes. Heat, road grime, and age take a toll, and towing or rough roads can hurry them along. If one mount looks tired, the others won’t be far behind, so replacing them in pairs (or across an axle line) helps keep the exhaust sitting even. When fitting, support the exhaust with a stand, use a dab of silicone spray on the pegs to slide the rubbers on, and check that all brackets and weld-on hangers are sound and rust-free. Final step: confirm tailpipe alignment and clearance around heat shields, diff, and bumper, then road test for knocks over bumps.

Tell-tale signs it’s time for new mounts include a low or crooked tailpipe, a thump on take-off or over speed humps, rattles at idle, or a new drone that wasn’t there before. There aren’t strict kilometre intervals for replacement, but a quick check at each service (or around every 20,000–30,000 km) keeps surprises at bay. If the car runs an aftermarket cat-back, consider slightly firmer mounts to control extra weight, but stick with OE-style rubber if comfort is the priority.

• Inspect at every service, replace if cracked, sagging, or noisy
• Support the exhaust during replacement, never jack on the pipe
• Verify clearances and recheck after a short drive

Popular questions about 2015 Holden Commodore exhaust mounts

How often should exhaust mounts be replaced?
There’s no fixed schedule. Most owners get many years from them, but they’re worth checking at each service. High-heat use, towing, or rough roads can see replacement anywhere from 80,000 to 120,000 km — sooner if symptoms show.

What are the symptoms of a failing exhaust mount?
Common giveaways are a rattle or thump from under the car, especially on start-up or over bumps, a tailpipe that sits low or off-centre, or new vibration/drone in the cabin as the system touches a shield or subframe.

Can a home mechanic replace the mounts?
Yes, with sturdy stands, basic hand tools, and some silicone spray. Make sure the exhaust is cool, support it before pulling any mount off, and double-check alignment afterwards. If brackets are rusted or a weld-on hanger is cracked, a workshop visit is best.