Parts for your 2019 Honda Odyssey-Sump plug washers

2019 Honda Odyssey sump plug washers

Yes — the 2019 Honda Odyssey uses a sump plug washer. Honda’s service information for the J35 V6 specifies replacing the drain bolt (sump plug) washer at each engine oil change and tightening the plug to 39 N·m (29 lbf·ft). Honda’s parts catalogue also lists a 14 mm aluminium crush washer (commonly referenced as P/N 94109-14000) for the Odyssey’s engine oil drain bolt. Those technical sources make it clear the washer is fitted and is a service item.

On this Odyssey, the sump plug washer is a small, single‑use crush ring that sits under the head of the drain bolt and seals the sump when the bolt is torqued. As it’s tightened, the soft metal deforms to fill tiny gaps between the sump face and the plug, stopping oil weeps and keeping the underbody clean. It also means you don’t have to over‑tighten the plug just to chase a seal — the washer does the sealing work while the torque spec protects the threads in the alloy sump.

Because it’s designed to crush once, reusing an old washer is a common cause of slow leaks, damp patches on the sump, or a plug that keeps loosening. On the 2019 Odyssey, a fresh 14 mm Honda washer is cheap insurance at every service. Ask for the genuine aluminium crush washer sized for the engine oil drain plug and you’ll be set.

Best practice for servicing this model’s sump plug washer:

• Replace the washer at every oil and filter change (every 10,000–15,000 km or 12 months, per your service schedule and driving conditions).
• Clean the sump’s sealing face, remove old washer fragments if stuck.
• Fit the new 14 mm crush washer and torque the drain bolt to 39 N·m (29 lbf·ft) — don’t just “nip it up”.
• After refilling and a short run, check for any drips around the plug.

Some aftermarket washers (aluminium or copper) will work if they match the correct size and thickness, but sticking with the Honda‑specified 14 mm crush washer keeps the seal consistent and avoids guesswork. Done right, it’s a two‑minute step that prevents a world of mess later.

Popular questions about 2019 Honda Odyssey sump plug washers

Does the 2019 Odyssey definitely need a new washer at each oil change?
Yes. Honda’s service procedure calls for replacing the drain bolt washer every time the oil is changed. It’s a single‑use crush washer, reusing it risks a weep or needing extra torque that can damage threads.

What size and torque should be used?
The engine oil drain uses a 14 mm crush washer. Tighten the sump plug to 39 N·m (29 lbf·ft) with the new washer fitted. That gives a reliable seal without overtightening the alloy sump.

Can a copper washer be used instead of aluminium?
It can work if it’s the correct 14 mm size and comparable thickness, but Honda specifies an aluminium crush washer for consistent sealing. Most owners stick with the genuine item to avoid leaks.