Parts for your 2006 Honda Odyssey-Sump plug washers

2006 Honda Odyssey sump plug washers

Technical sources confirm the 2006 Honda Odyssey does use a sump plug washer (crush washer/gasket) on the engine oil drain plug. The Honda Odyssey 2005–2010 Service Manual (Lubrication section) specifies “Always use a new drain plug washer” and lists a torque of 39 N·m (29 lbf·ft) for the drain plug. Honda’s parts catalogue also shows a 14 mm aluminium drain plug washer (commonly listed as “Washer, Drain Plug 14 mm,” p/n 94109-14000) for this model. That means it’s a fitted, function-critical part on the J35 V6 sump.

On a 2006 Odyssey, the sump plug washer’s job is simple but vital: it deforms slightly when the plug is torqued, filling microscopic gaps between the plug face and the sump to create a reliable, leak-free seal. Being aluminium, it’s designed as a single-use crush washer. Reusing it can lead to drips on the driveway, oil smell on hot components, or a plug that needs over-tightening to seal—never ideal for the alloy sump threads.

Best-practice servicing for this model is to replace the washer at every oil change. It’s a cheap consumable that protects the sump threads, keeps the oil level stable between services, and saves mess. The correct washer size is 14 mm to suit the Odyssey’s M14-1.5 drain plug. When fitting a new one, clean the sump’s sealing face, hand-start the plug to avoid cross-threading, then torque to 39 N·m. No thread sealant is needed, the washer is the seal.

Why aluminium over copper or fibre? Honda engineered the stack-up around an aluminium crush washer’s deformation and friction characteristics. Using the right material helps the plug reach torque without galling, and ensures proper “crush” for a first-time seal. Flat generic washers don’t compress correctly and can seep, especially as the engine and pan heat-cycle.

Signs the washer needs attention include dampness around the plug, a small oil spot after parking, or evidence of previous over-tightening. If there’s any doubt—replace it. Many owners keep a few genuine-spec 14 mm washers on the shelf alongside oil and a filter so routine services are straightforward and tidy.

1. Washer type: 14 mm aluminium crush washer (single-use).
2. Torque spec: 39 N·m (29 lbf·ft) on the engine oil drain plug.
3. Replace at every oil change for consistent sealing and sump thread protection.

Popular questions

What size sump plug washer does a 2006 Honda Odyssey use?
The Odyssey uses a 14 mm aluminium crush washer on the engine oil drain plug. It’s designed to deform once when torqued, so it should be replaced every time the oil is changed.

How often should the sump plug washer be replaced on a 2006 Odyssey?
Every oil change. The washer is single-use, reusing it risks weeping and overtightening the plug, which can damage the sump threads.

What’s the correct torque for the 2006 Odyssey’s drain plug?
39 N·m (29 lbf·ft). Using a torque wrench helps avoid overtightening. If a torque wrench isn’t available, nip it up firmly after seating, but don’t lean on it—let the new crush washer do the sealing.