• The washer is flattened, cracked, or damaged
• Differential fluid is leaking from the drain or fill plug
• Oil stains visible under the rear of the vehicle
• The old washer has been reused (must be replaced)
• You are performing a differential fluid change and need a new washer
• The plug is loose or difficult to tighten due to a worn washer

• ✔ Genuine Honda OEM part — not an aftermarket or Chinese replica
• ✔ 20mm inner diameter — fits standard Honda differential drain and fill plugs
• ✔ Made from high‑quality copper — compresses evenly for a reliable seal
• ✔ Single‑use crush washer — ensures leak‑tight sealing every time
• ✔ Bag of 10 washers — great value for multiple fluid changes
• ✔ Backed by Honda’s manufacturer warranty (valid through any authorized dealer)

• 10 × Honda 94109-20000 crush washers (genuine)

FAQ

Is this a genuine Honda part or a copy?
This is 100% genuine Honda OEM — in original factory packaging with Honda part number printed on the label. It is not an aftermarket brand or a replica.

Will these washers fit my 2015 Honda CR-V differential?
Yes — the 3rd–5th generation CR-V uses the 20mm washer for the rear differential drain and fill plugs. We recommend verifying your plug size.

Can I reuse the old washer?
No — this is a crush washer and is designed for one‑time use only. Reusing an old washer will cause leaks. Always use a new washer when you remove the plug.

How many washers are in the bag?
This listing includes a bag of 10 washers.

What is the torque spec for the differential plug?
The typical torque spec for the differential drain/fill plug is approximately 35–45 Nm. Always refer to your vehicle's service manual for the exact specification.

Will this washer fit my transmission?
Yes — this washer is also used on select Honda transmission drain/fill plugs. Please verify the plug size on your transmission.

Are these washers the same as the engine oil drain plug washer?
No — the engine oil drain plug typically uses a smaller washer (usually 14mm or 16mm). This washer is 20mm and is designed for differential and transmission applications.

Can I use this washer for other 20mm plugs?
Yes — this washer can be used on any 20mm drain or fill plug that requires a copper crush washer, provided the plug and housing are designed for this washer.

How do I install the washer?
Place the new washer onto the plug, then thread the plug into the differential housing. Tighten to the specified torque from your service manual. The washer will compress and form a seal as the plug is tightened.