Parts for your 2010 Honda Odyssey-Sump plug washers

2010 Honda Odyssey sump-plug washers

Yes, the 2010 Honda Odyssey uses a sump-plug (engine oil drain plug) crush washer. Honda’s own technical guidance confirms it: the Owner’s Manual oil-change procedure instructs fitting a new washer to the drain bolt at each service, and the Honda service manual echoes the “always replace the drain plug washer” note. Honda’s parts catalogue also lists a 14 mm aluminium drain plug washer for this model (commonly supplied under part number 94109-14000), so it’s very much a standard, required item.

What does the washer actually do? It’s a small, soft aluminium ring that “crushes” as the plug is torqued up, sealing the joint between the sump and the drain bolt. That tiny bit of controlled deformation takes up surface imperfections and keeps engine oil where it should be—inside the sump. Without a good washer, the plug can bottom out on the sump face or distort threads before it seals, leading to weeping, drips on the driveway, or worse, a loose plug over time.

• Replace it every oil change—it’s designed for one-time crush and seal.
• Use the correct size: 14 mm aluminium crush washer (Honda spec).
• Tighten the drain plug to about 39 N·m (29 lbf·ft). Don’t lean on it—the washer does the sealing, not brute force.

Good practice for the 2010 Odyssey is simple: remove the old washer (they sometimes stick to the sump), wipe the mating face clean, slide on a new washer, then refit and torque the plug. After refilling, run the engine, switch off, and have a look underneath for any tell-tale seepage. Re-check after a short drive. Avoid stacking washers or swapping in random copper/fibre versions, while they may seem close enough, the Honda aluminium washer is sized and tempered to crush at the right load, so it seals consistently without over-tightening.

They’re cheap, they prevent leaks, and they make future services easier—no dramas. For Aussie and Kiwi owners keeping an Odyssey on family duty, tossing a couple of genuine-spec washers into the glovebox means every oil change is quick, clean, and by the book.

Popular questions about 2010 Honda Odyssey sump-plug washers

What size sump-plug washer does the 2010 Odyssey use?
It takes a 14 mm aluminium crush washer for the engine oil drain plug. Honda’s common listing is an aluminium 14 mm washer (often referenced as P/N 94109-14000), which suits the Odyssey’s sump plug perfectly and crushes to seal at the specified torque.

Can the washer be reused?
Not recommended. The aluminium ring is designed to deform once. Reusing can lead to slow weeps or a plug that needs over-tightening to seal. In a pinch it might get you by, but best practice is a fresh washer every service.

What torque should the drain plug be tightened to?
About 39 N·m (29 lbf·ft). That figure is enough to crush a new washer and create a reliable seal without risking damage to the sump threads. If you find yourself needing more grunt, stop and check that the old washer isn’t stuck to the sump face.