Parts for your 2020 Honda Odyssey-Sump plug washers

2020 Honda Odyssey sump plug washers

Yes, the 2020 Honda Odyssey is designed to use a sump plug washer. Honda’s technical literature backs this up: the 2020 Odyssey Owner’s Manual instructs fitting a new drain plug washer during every engine oil change, and the Honda Service Information procedure for Engine Oil Replacement (J35-series V6) specifies installing a new aluminium crush washer and torquing the drain plug to about 39 N·m. The Honda Genuine Parts catalogue also lists the correct washer as “Washer, Drain Plug (14 mm),” commonly supplied under P/N 94109-14000 for this model. All three are consistent that a new washer is required at each service.

On this Odyssey, the sump plug washer is a single‑use aluminium “crush” ring that deforms slightly as the plug is tightened. That controlled crush creates a reliable metal-to-metal seal between the sump and the plug, keeping engine oil where it belongs and helping prevent seepage as the engine heats and cools. Reusing a flattened washer can lead to a slow weep or, worse, the temptation to overtighten the plug to stop a leak, which risks stripping threads in the alloy sump—never a cheap fix.

For routine servicing, it’s smart practice to replace the washer every oil change (typically every 10,000–15,000 km or 12 months, depending on how the Odyssey is driven). Stick with the correct 14 mm aluminium type. Copper or fibre washers might look similar, but Honda’s procedure is written around the crush characteristics of the genuine aluminium ring. A fresh washer costs next to nothing and buys peace of mind.

Handy pointers when doing the job:

• Clean the sump’s sealing face and the plug threads before reassembly.
• Fit a new 14 mm aluminium crush washer the right way round (flat face to the sump).
• Tighten the plug to about 39 N·m using a torque wrench—don’t guess with a long spanner.
• After the first heat cycle, check under the bonnet and around the plug area for any signs of a fresh weep.

If there’s any oil spotting on the driveway after a service, or a faint oil smell after parking, it’s worth inspecting the sump plug area. Often, simply replacing a reused washer and torquing correctly sorts it. Using the right washer, every time, keeps the Odyssey’s V6 happy and leak‑free.

Popular questions about 2020 Honda Odyssey sump plug washers

Do I need to replace the sump plug washer at every oil change?
Honda’s service procedure says yes—fit a new aluminium crush washer each time. It’s a single‑use seal designed to deform once. Reusing an old one can cause weeping or lead to overtightening the plug.

What’s the correct torque for the sump plug on a 2020 Odyssey?
The factory spec for the J35 V6 is about 39 N·m. Using a torque wrench matters, it protects the alloy sump threads and ensures the crush washer seals properly.

What size or part number is the correct washer?
It’s a 14 mm aluminium crush washer commonly supplied as Honda P/N 94109-14000. Most reputable parts counters in Aus and NZ will know this as the standard Honda drain plug washer.