Parts for your 2004 Honda Odyssey-Exhaust mount

2004 Honda Odyssey Exhaust-Mount — Purpose, Care, and When to Replace

Technical sources confirm the 2004 Honda Odyssey is fitted with exhaust-mounts. The Honda Odyssey Factory Service Manual (1999–2004) describes removing the exhaust from rubber insulators during exhaust work, and common workshop manuals detail the same procedure. OEM parts catalogues for the 2004 model list multiple exhaust hanger rubbers and brackets along the system. So, yes—exhaust-mounts are very much relevant on this vehicle.

On the 2004 Odyssey, the exhaust-mount (rubber hanger/insulator with a supporting bracket) suspends the exhaust so it can flex and move without knocking the body, subframe, or suspension. These mounts soak up vibration, keep the pipework correctly aligned, and protect the manifolds and catalytic converter from stress. When the mounts age or tear, the exhaust can sag, rattle, or hit the underbody, which is noisy and can lead to cracks or leaks.

For everyday servicing, it’s smart to give the exhaust-mounts a once-over any time the car’s on a hoist—typically every 10,000–15,000 kilometres. Rubber perishes with heat and time, so look for cracks, glazing, splits at the peg holes, or a mount that’s gone soft and lets the muffler sit crooked. Also check the metal hangers for rust and the brackets for loose fasteners.

• Signs it’s time to replace: thumps over bumps, rattles at idle, droning at cruise, or shiny “witness marks” where the pipe has touched heat shields or the body.
• Good practice: replace tired mounts in pairs on the same section (e.g., both rear muffler hangers) to keep alignment even.
• Handy tip: a dab of silicone spray helps the rubber slide off and on, dedicated exhaust-hanger pliers make the job easier.

When replacing, support the exhaust with a jack and block of wood so there’s no load on the remaining mounts. Fit the new exhaust-mounts in the same orientation as the originals, then check clearances around the subframe, sway bar, heat shields, and rear bumper—there should be space all around so the system can move without contact. Tighten bracket fasteners to the specifications in the service manual and recheck after a short drive once the system has heat-cycled.

Kept in good nick, quality rubber mounts often last years, but heat, towing, and rough roads can accelerate wear. Regular inspections save a world of rattles and keep the Odyssey comfy and quiet.

How many exhaust-mounts are on a 2004 Honda Odyssey?

Most 2004 Odysseys have three to five mounts, depending on market and exhaust layout. Expect at least one near the front pipe or resonator, a centre support, and two at the rear muffler. Some variants include an additional hanger near the catalytic converter bracket.

How often should the exhaust-mounts be replaced?

There’s no fixed interval. Inspect at each service, replace any mount that’s cracked, sagging, oil-soaked, or allowing contact. In typical Aussie and Kiwi conditions, many last 5–10 years, but vehicles that tow, do lots of short trips, or see corrugations may need new mounts sooner.

What noises point to a bad exhaust-mount?

Common clues include a hollow thump over bumps, a tinny rattle at idle, or a low-frequency drone at motorway speeds. If the exhaust has kissed the body or shields, you’ll often see shiny scuff marks where it touched.