Parts for your 2009 Honda Odyssey-Sump plug washers

2009 Honda Odyssey sump plug washers — what they do and when to replace

Yes, the 2009 Honda Odyssey uses a sump plug (oil drain) washer. Honda specifies an aluminium crush washer that deforms to seal the drain bolt against the sump. This is stated in Honda’s service literature for the third‑generation Odyssey and in the 2009 Owner’s Manual oil-change procedure, which instructs fitting a new washer to the drain bolt and tightening the bolt to about 39 N·m (29 lb‑ft). The genuine Honda washer commonly referenced for this model is the 14 mm drain plug washer (often listed as part number 94109‑14000 in Honda parts catalogues).

On this Odyssey, the sump plug washer’s whole job is to provide a reliable, single‑use seal that prevents engine oil weeping past the drain bolt. Being a crush washer, it’s designed to deform once to match the surfaces of the sump and bolt head. Reusing it can lead to slow leaks, oil stains on the driveway, and the annoying need to recheck fluid levels. That’s why Honda calls for replacing the washer at each oil change.

For owners and workshops across Australia and New Zealand, the habit is simple: every oil service, new washer. It’s a cheap part that protects an expensive engine and keeps things tidy. If the plug’s been over‑tightened in the past or the sump face is nicked, even a new washer might not seal perfectly—so a quick wipe and inspection of the sealing surface is worth the extra minute.

• Replace the washer at every oil and filter change (typically 10,000–15,000 km or 6–12 months, depending on your service schedule and conditions).
• Tighten the drain bolt to 39 N·m (29 lb‑ft). Don’t swing off it—overtightening can distort the washer or damage threads.
• If stuck, a reused washer may “look fine” but can seep. Keep a small stash of new washers handy to avoid reusing.
• If a leak appears after a service, first check torque, then replace the washer again and inspect the sealing faces.

While copper washers exist, Honda’s spec for this Odyssey is an aluminium crush style. Sticking with the correct material and size helps the plug torque up accurately and seal first go. Fast, clean, and no drama at the next service.

Popular questions

What size sump plug washer does a 2009 Honda Odyssey use?
The Odyssey uses a 14 mm drain plug washer sized to suit Honda’s V6 sump plug. In parts listings, it’s commonly the Honda aluminium crush washer often shown as 94109‑14000. Using the correct 14 mm washer ensures proper sealing and correct torque.

Can the sump plug washer be reused?
It’s not recommended. The washer is a crush design meant for one‑time use. Reusing it can cause slow weeping or leaks. Given how inexpensive it is, replacing it with every oil change is the safer move.

What torque should the sump plug be tightened to?
Honda specifies about 39 N·m (29 lb‑ft) for the drain bolt on the 2009 Odyssey. Using a torque wrench helps avoid overtightening, which can distort the new washer or damage threads.