Parts for your 2019 Honda Odyssey-Exhaust gasket

2019 Honda Odyssey exhaust gasket — what it does and when to replace it

Yes, the 2019 Honda Odyssey uses exhaust gaskets. Honda’s factory Service Manual for the 2018–2020 Odyssey (J35Y-series V6) and the Honda Electronic Parts Catalogue list multiple “exhaust gaskets” across the system — including a multi‑layer steel manifold gasket at the cylinder head, crush‑ring (donut) gaskets at the front pipe/catalyst joints, and flat flange gaskets further down the pipework. Those sources also note that the crush‑type gaskets are single‑use items that should be replaced whenever disturbed.

On this Odyssey, exhaust gaskets seal hot, high‑pressure gases as they leave the engine and travel through the catalytic converters, resonator and muffler. They keep the cabin quiet, help the oxygen sensors read correctly, and stop stray leaks that can trigger fuel‑trim issues or an emissions fail. If a gasket’s crushed once and then reused, it usually won’t spring back, which is why Honda marks them as replace‑on‑removal items in the service procedures.

For servicing, it’s smart to treat exhaust gaskets as small, cheap insurance. Any time the front pipe, catalytic converter, or rear sections are dropped — say, for transmission work, engine mounts, or a muffler swap — factor new gaskets into the job along with hardware like spring bolts or studs if they’re tired. Genuine or quality aftermarket parts both do the trick, provided the fitment matches the Odyssey’s year and engine spec.

• Typical signs a gasket’s on the way out:
  • Ticking or puffing noise on cold start that lessens warm
  • Exhaust smell near the engine bay or underfloor
  • Sooty tracks at a flange or joint
  • Check Engine Light for fuel trims/O2 sensor performance
• Good workshop habits on this model:
  • Replace crush‑ring and flange gaskets whenever a joint is opened
  • Support the exhaust to avoid stressing the flex and hangers
  • Heat or penetrant on rusty fasteners, avoid snapping studs
  • Torque evenly in a criss‑cross pattern, follow Honda specs
  • Don’t smear sealant on O2 sensor threads, use the correct sensor compound only if specified

Owners in Australia and New Zealand will find gasket availability is good, and pricing is modest compared with the labour saved by preventing repeat leaks. Done right, the Odyssey stays quiet, legal, and happy on fuel.

Popular questions

Does the 2019 Odyssey actually have more than one exhaust gasket?

It does. There’s a manifold gasket at the cylinder head, crush‑ring gaskets at the front pipe/catalyst connections, and flat flange gaskets further back. Honda’s service info and parts listings show these as distinct items, each sealing a different joint.

Can the exhaust gaskets be reused after taking the exhaust down?

Best not. The crush‑type ring gaskets are designed to deform once. Reusing them often leads to leaks and noise, and can skew O2 readings. Fit new gaskets whenever a joint is opened.

What will it cost to replace a leaking exhaust gasket on a 2019 Odyssey?

Parts are usually inexpensive — roughly AUD/NZD $20–$70 per gasket depending on type. Labour varies with location: about 0.5–2.0 hours for most joints. Expect a fitted price in the ballpark of AUD/NZD $150–$400, more if studs or spring bolts need replacing.