Parts for your 2001 Daihatsu Yrv-Sump plug washers

2001 Daihatsu YRV sump plug washers — what they do and when to replace them

Yes, the 2001 Daihatsu YRV uses a sump plug washer. Daihatsu’s service literature for the M200-series YRV (K3-VE/K3-VET engines) specifies a replaceable drain plug gasket/washer for sealing the oil pan, and parts catalogues for this model list the washer as a separate service item. Major aftermarket catalogues in AU/NZ also list a crush washer for the YRV, typically the 12 mm inside-diameter type, confirming it’s a fitted, consumable part.

On this little Daihatsu, the sump plug washer does the hard yards of sealing the drain plug to the alloy sump. It’s usually a soft aluminium or copper “crush” washer that deforms slightly when torqued, creating a reliable seal against hot, thin engine oil. Without a good washer, even a correctly tightened plug can seep, making a mess on the driveway and, worse, lowering the engine’s oil level over time.

Best practice on the YRV is simple: replace the sump plug washer at every oil change. They’re inexpensive, they’re designed for single use, and swapping one in takes seconds. Reusing a flattened washer invites weeping leaks, especially once the oil’s hot on a motorway run. When servicing, clean the plug and the sump’s sealing face, fit a fresh washer of the correct size and material, then tighten the plug to factory torque. Over-tightening can distort the washer or damage threads, so it’s worth using a torque wrench if you’ve got one.

If there’s any sign of seepage after a service—an oil spot under the car, a damp ring around the plug—start by replacing the washer again and inspecting the seating surfaces. A nicked or burred sump face, or a chewed-up plug, can also cause drama, both are cheap to put right compared with running low on oil.

Choosing washers for a 2001 Daihatsu YRV is straightforward. Most examples take a 12 mm ID crush washer, but it pays to check against the old one or confirm by VIN, as some markets and replacement sumps/plugs vary. Keep a small stash in the toolbox so a routine oil change doesn’t stall for want of a two-dollar part.

• Replace the washer at every oil change.
• Clean mating faces, avoid sealants and thread tape.
• Use the correct size/material and tighten to spec.

Popular questions about 2001 Daihatsu YRV sump plug washers

What size sump plug washer does a 2001 Daihatsu YRV use?
Most 2001 YRV models use a 12 mm inside-diameter aluminium or copper crush washer on the drain plug. Because some vehicles have had replacement plugs or pans over the years, it’s smart to confirm by measuring the old washer or checking by VIN before buying.

How often should the sump plug washer be replaced?
Replace it at every oil change. The washer is designed to deform once to seal properly. Reusing it can lead to weeping leaks, especially after long, hot drives. Given the low cost, it’s cheap insurance for the YRV’s K3 engine.

Can sealant be used instead of a new washer?
Not recommended. Sealants and thread tape don’t provide the correct crush and can break off into the sump. If there’s a leak, fit the correct new washer and inspect the plug and sump face, replace any damaged parts and torque the plug correctly.