Parts for your 2011 Honda Accord-Sump plug washers

2011 Honda Accord sump plug washers — are they used?

Yes, the 2011 Honda Accord uses a replaceable aluminium crush washer on the engine oil drain (sump) plug. Honda factory service information for the 8th‑gen Accord (2008–2012) specifies replacing the drain bolt washer at each oil change and tightening the plug to about 39 N·m (29 lbf·ft). Honda’s owner’s and service manuals call this out to ensure a proper seal. The commonly used genuine part is a 14 mm aluminium crush washer (often referenced as Honda P/N 94109‑14000).

For the 2011 Accord, the sump plug washer is a small but crucial piece of kit. It’s a soft aluminium ring that sits between the drain bolt and the sump. When the bolt is torqued, the washer “crushes” slightly to take up any tiny imperfections, creating a reliable, leak‑free seal. That means less chance of drips on the driveway and no slow oil weeps that can lead to low oil levels or a messy underbody.

Because it deforms to seal properly, it’s designed as a single‑use item. Reusing a crushed washer can lead to seepage, weeping around the plug, or a bolt that feels tight before the proper torque is reached. That’s why Honda’s service procedures recommend fitting a new washer at every oil change. It’s an inexpensive part that protects an expensive engine.

Best practice when servicing a 2011 Accord is pretty straightforward:

• Always have a new 14 mm aluminium crush washer on hand for each oil change.
• Clean the mating faces of the sump and the drain bolt before refitting.
• Install the new washer, thread the bolt by hand first, then torque the drain plug to about 39 N·m.
• Wipe the area, run the engine, and check for any signs of seepage after a few minutes.

Signs the washer needs attention include fresh oil around the drain plug, a faint burning‑oil smell after driving (oil mist hitting hot exhaust), or a droplet forming at the plug. If the plug has been overtightened in the past, inspect the bolt for thread damage and replace if needed—don’t “gorilla” it tighter to stop a leak, as that risks stripping the sump. Sticking with the correct torque and a fresh washer each service keeps things tidy and the engine happy.

For most Aussie and Kiwi owners, grabbing a small pack of genuine‑spec 14 mm crush washers and treating them as a standard service consumable is the simplest, no‑drama approach.

• What size sump plug washer does a 2011 Honda Accord use?
  Most 2011 Accords use a 14 mm aluminium crush washer on the engine oil drain plug. This size refers to the bolt/port it seals, not the spanner size. Genuine Honda 14 mm washers are widely available and are the safe match for factory hardware.
• Do you really need to replace the washer every oil change?
  Yes. The washer is designed to deform once to make a perfect seal. Reusing it increases the chance of seepage or needing excessive torque on the plug. A fresh washer at each service is cheap insurance against leaks.
• What torque should the drain plug be tightened to?
  About 39 N·m (29 lbf·ft) is the typical Honda spec for the Accord’s engine oil drain plug. Use a torque wrench, over‑tightening can crush the washer unevenly or damage threads, and under‑tightening can allow a slow leak.