Parts for your 2007 Honda Odyssey-Sump plug washers

2007 Honda Odyssey sump plug washers

Honda’s own service information for the third‑gen Odyssey (MY2007) and the Honda Genuine Parts catalogue both specify a sump plug washer for the engine oil drain bolt: a 14 mm aluminium crush washer (commonly listed as Honda part number 94109‑14000). The factory manual also calls for replacing this washer at each oil change and tightening the drain bolt to 39 N·m (29 lbf·ft). So yes, a sump plug washer is absolutely used on a 2007 Honda Odyssey.

On this Odyssey, the sump plug washer does the quiet but vital job of sealing the engine’s alloy sump against the steel drain bolt. Being a soft aluminium “crush” design, it deforms slightly as the bolt is torqued, filling tiny surface imperfections so oil can’t seep out. That controlled crush also helps the bolt reach its correct clamping force without the need to overtighten, which is especially important with an aluminium sump.

Best practice is to fit a new washer every service. It’s a cheap part that prevents annoying drips on the driveway and avoids owners chasing phantom leaks later. Reusing a flattened washer can lead to weeping, overtightening, or even damaged threads. The genuine 14 mm washer is flat and can be installed either way up, just make sure the mating surfaces are clean.

When servicing a 2007 Odyssey, a straightforward routine keeps things tidy:

• Warm the engine, then remove the drain bolt with a 17 mm socket.
• Discard the old washer and wipe the sump face and bolt shoulder clean.
• Slip on a new 14 mm aluminium crush washer and hand‑thread the bolt.
• Torque to 39 N·m (29 lbf·ft), run the engine, then check for leaks.

Aftermarket copper or fibre washers exist, but Honda’s own spec is aluminium. If using alternatives, stick with the correct 14 mm internal diameter so the crush characteristic and sealing land suit the Odyssey’s sump. Never double‑stack washers, never use thread tape, and if threads feel suspect, stop and inspect—better to repair a thread than split a sump.

For owners in Australia and New Zealand doing their own servicing, tossing a couple of genuine washers into the parts bin makes oil changes easy. It’s a tiny part that keeps the big family bus clean, reliable, and compliant with the way Honda engineered it.

Popular questions about 2007 Honda Odyssey sump plug washers

What size washer does the 2007 Odyssey use?
The 2007 Honda Odyssey uses a 14 mm aluminium crush washer on the engine oil drain bolt (commonly referenced as Honda p/n 94109‑14000). This size refers to the bolt/washer internal diameter. It’s designed to deform once for a perfect seal.

Can the washer be reused?
It’s technically possible in a pinch, but not recommended. The washer is a one‑time crush design, reusing it can cause seepage or tempt overtightening. Given the low cost, fit a fresh washer at every oil change.

What torque should the drain bolt be tightened to?
Honda’s service spec for the 2007 Odyssey engine oil drain bolt is 39 N·m (29 lbf·ft). Use a 17 mm socket, start the bolt by hand, torque it properly, then check for leaks after running the engine.