Parts for your 2010 Honda Accord-Sump plug washers

2010 Honda Accord sump plug washers — what they do and when to replace

Yes, the 2010 Honda Accord uses a sump plug washer (also called a drain plug crush washer). Honda’s own documentation specifies it: the 2010 Accord Owner’s Manual and the Honda workshop manual for 2008–2012 models instruct replacing the drain bolt washer at each oil change, and Honda’s parts catalogue lists a 14 mm aluminium drain plug washer (genuine part number 94109-14000) for both the Accord and Accord Euro of this era. That’s straight from Honda’s technical guidance, not hearsay.

The sump plug washer’s job is simple but critical: it seals the gap between the sump (oil pan) and the drain bolt so engine oil can’t seep out. It’s a soft, single‑use aluminium crush washer designed to deform slightly when tightened. That controlled crush fills microscopic imperfections in the mating surfaces, creating a reliable, leak‑free seal without needing excessive torque.

Because it’s designed to deform, it should be replaced at every oil change. Re‑using a flattened washer is a common cause of slow weeps or drips. Signs it’s time (besides routine servicing) include an oily film around the plug, a drip on the driveway after a service, or a washer that’s visibly dished or gouged.

Best practice on a 2010 Accord is straightforward:

• Use a new 14 mm aluminium crush washer (Honda P/N 94109-14000 or equivalent).
• Clean the sump sealing face and the drain bolt before refitting.
• Tighten the drain bolt to the workshop torque spec (about 39 N·m). Don’t “swing off it” — over‑tightening can distort the washer, or worse, damage the sump threads.

Plenty of aftermarket options exist (including copper), but stick with an aluminium crush type from a reputable brand so it deforms as intended at the specified torque. If using a non‑genuine washer, confirm thickness and material match OEM to avoid under‑ or over‑crush.

For most owners in Australia and New Zealand, the washer swap simply becomes part of each oil change — quick, inexpensive, and a great safeguard against leaks. It’s smart to keep a couple on hand so they’re never forgotten during a weekend service. Follow Honda’s schedule for oil changes, replace the washer each time, and the Accord’s sump will stay tidy and dry.

Technical sources referenced: 2010 Honda Accord Owner’s Manual (Engine Oil and Filter section), Honda Accord 2008–2012 Workshop Manual (Lubrication section — drain bolt and washer replacement and torque), Honda Genuine Parts Catalogue listing “Washer, Drain Plug (14 mm) 94109‑14000” for 2010 Accord/Accord Euro.

FAQ: What size sump plug washer does a 2010 Honda Accord use?

It uses a 14 mm aluminium crush washer (Honda genuine part number 94109‑14000). That suits both the four‑cylinder and V6 variants, including the Accord Euro of the same vintage.

FAQ: How often should the washer be replaced?

Replace it at every oil change. Honda’s service information calls for a new crush washer each time the drain bolt is removed so it can deform correctly and maintain a leak‑free seal.

FAQ: Can a copper washer be used instead of the Honda aluminium one?

You can, but make sure it’s a proper soft crush type and the correct size and thickness. Aluminium matches Honda’s spec and crush characteristics, with copper, confirm torque and sealing are spot on, then keep an eye out for any weeping after the first few drives.