Parts for your 2021 Honda Odyssey-Exhaust mount

2021 Honda Odyssey exhaust mount: what it does and when to replace it

Yes, the 2021 Honda Odyssey is fitted with exhaust mounts (rubber insulators/hangers). This is supported by Honda’s factory Service Manual procedures for the RL6 Odyssey covering exhaust system removal/installation, which specify detaching and refitting the rubber exhaust insulators, and by the Honda Genuine Parts Catalogue for the 2021 Odyssey showing multiple “exhaust insulator” items on the pipe and muffler assemblies. General NVH guidance in OEM service literature also describes elastomeric hangers as the standard method for supporting and isolating exhaust systems on modern vehicles.

On the Odyssey, the exhaust mount’s job is pretty straightforward: hold up the pipework and mufflers while isolating vibration so the cabin stays quiet. The rubber hangers allow the system to move a touch when the engine twists on its mounts, when the exhaust heats up and grows a bit, and when the van hits bumps. That flexibility keeps the clearances right and stops the tailpipe from knocking on the body or rear suspension.

As part of regular servicing, it’s smart to give the exhaust mounts a quick look. They live under the vehicle, so road grime, heat, and age can harden or crack the rubber. If an insulator sags or tears, the exhaust can droop, go off-centre, or rattle at idle and over bumps. A quick visual inspection at every service interval (or around 10,000–15,000 kilometres, following your local schedule) helps catch issues early.

• Tell-tale signs they’re due: thumps or rattles from the rear, a droney note inside, or a tailpipe sitting low or skew-whiff.
• Replacement tips: use OEM-quality rubber insulators, polyurethane options are tougher but can add a bit of vibration.
• Fitment notes: support the exhaust, remove the old insulators (a mist of silicone spray helps), and refit, making sure the system sits centred with even clearances.
• Avoid petroleum-based lubes on the rubber, they can degrade it.

If one mount’s perished, the rest may not be far behind, so replacing them as a set can save repeat visits. After any mount swap, re-check alignment and bracket fasteners to the service manual spec. It’s a small job that pays off with a quieter, rattle-free Odyssey and less stress on joints and flanges.

Popular questions about 2021 Honda Odyssey exhaust mounts

How do you know an exhaust mount has failed on a 2021 Odyssey?
Common clues are a metallic rattle over bumps, a thud at start-up or shut-down, a deeper cabin resonance, or the tailpipe sitting lower than normal. A quick look underneath often reveals a cracked or stretched rubber insulator or a mount that’s no longer aligned.

How often should exhaust mounts be replaced?
There’s no fixed interval, they’re replaced on condition. Have them inspected at each service. In Aussie and Kiwi conditions, many last years, but high heat, towing, or lots of short trips can age the rubber faster. Replace at the first signs of cracking, hardening, sagging, or noise.

Is it safe to drive with a broken exhaust mount?
Short-term, the vehicle may still be drivable, but it’s not ideal. A dropped or misaligned exhaust can strain joints, leak, or contact the body or suspension. Excess movement can also damage sensors or the muffler. It’s best to get it checked and sorted promptly.