Parts for your 2013 Toyota Vitz|yaris-Sump plug washers

2013 Toyota Vitz/Yaris sump-plug-washers: what they do and when to replace them

For the 2013 Toyota Vitz/Yaris, a sump plug washer is absolutely relevant and used. Technical sources that back this up include Toyota’s repair manual procedures for the Yaris/Vitz engines (1KR-FE, 1NR-FE and 1NZ-FE), which specify fitting a new drain plug gasket at oil change, and Toyota’s Electronic Parts Catalogue listing a 12 mm drain plug gasket (Toyota Genuine Part “Gasket, Drain Plug” 90430-12031) for these engines. These sources collectively confirm the vehicle uses a crush-type sump plug washer that’s intended to be replaced when the engine oil is serviced.

On this model, the sump plug washer (often called a crush washer) seals the oil drain plug to the sump so oil doesn’t seep out under pressure and heat. It’s a soft metal ring—typically aluminium—that compresses slightly when the plug is tightened. That controlled crush takes up minor surface imperfections, giving a reliable, leak-free seal without having to overtighten the plug.

As part of routine servicing on a 2013 Vitz/Yaris, best practice is to replace the sump-plug-washers at every oil change. Toyota’s service instructions call for a new gasket on reassembly because the old washer has already been deformed, reusing it can lead to weeping or full-on leaks. The correct washer for most trims is the 12 mm Toyota alloy crush washer (commonly 90430-12031). Always confirm by VIN if unsure, especially if the sump, plug, or pan has been changed in the past.

• When to replace: every oil change, or any time the drain plug is removed.
• What to watch for: oil mist or drips around the plug, a flattened or gouged washer, or a plug that needs to be over-tightened to stop a leak.
• Fitment tips: clean the mating faces, use the correct washer orientation (flat faces against pan and plug), and tighten the plug to the factory torque spec noted in the service manual—no need to lean on it.

Owners who’ve swapped to aftermarket magnetic plugs should check whether a specific washer or an O-ring is supplied, if it’s an O-ring design, follow that manufacturer’s instructions. Otherwise, stick with the genuine-style 12 mm crush washer. It’s a cheap part that protects a pricey sump thread and keeps the Vitz/Yaris tidy—no oil spots on the driveway, no dramas.

Popular questions about 2013 Toyota Vitz/Yaris sump-plug-washers

Does a 2013 Toyota Vitz/Yaris need a new sump plug washer at every oil change?
Yes. Toyota’s service procedures specify installing a new drain plug gasket on reassembly. Because the aluminium washer is a single-use crush seal, reusing it increases the risk of weeping or a proper leak, especially after a few heat cycles.

What size is the sump plug washer on a 2013 Vitz/Yaris?
It commonly uses a 12 mm crush washer that matches the M12 drain plug used on the 1KR-FE, 1NR-FE and 1NZ-FE engines. The Toyota Genuine part often referenced is 90430-12031. If the pan or plug has been changed, confirm by VIN or measure before ordering.

Can the sump plug washer be reused if it looks fine?
It’s not recommended. Even if it looks okay, the aluminium has already been compressed. Reusing can lead to under-sealing or the temptation to overtighten the plug, which risks damaging the sump threads. A fresh washer is inexpensive insurance.