Parts for your 2012 Toyota Vitz|yaris-Sump plug washers

2012 Toyota Vitz/Yaris sump plug washers

Yes, the 2012 Toyota Vitz/Yaris uses a replaceable sump plug washer (also called an oil drain plug gasket). This isn’t guesswork. Toyota’s own Service Information (TIS) Repair Manual for the XP130 Vitz/Yaris specifies installing the oil drain plug with a new gasket whenever it’s refitted. Toyota’s Genuine Parts Catalogue also lists the “Gasket, Oil Drain Plug” for the common engines fitted to this model (1KR-FE, 1NR-FE, 1NZ-FE), typically part number 90430-12031 (superseding 90430-12028). Independent guides such as the Haynes Toyota Yaris 2011–2017 manual likewise say to renew the drain plug washer at each oil change. So, on this model, the sump plug washer is absolutely relevant and is a normal service item.

On the 2012 Vitz/Yaris, the sump plug washer’s job is simple but critical: it seals the drain plug to the alloy sump so engine oil doesn’t seep out after a service. It’s a crush-style gasket—usually aluminium—that deforms once to create a tight, leak-free seal at the specified torque. Because it crushes on first use, it’s designed to be replaced every time the plug is removed. Reusing a flattened washer can lead to weeping leaks, a dust-and-grime ring around the plug, and slow oil loss between services.

As part of routine servicing, it makes sense to keep a couple of genuine or high-quality equivalent washers on hand. After draining the oil and cleaning the mating surface, fit a fresh washer and refit the plug to the torque shown in the Toyota manual for the exact engine variant. Don’t over-tighten—chasing drips with more grunt risks damaging threads in the sump. If a previous owner has fitted an aftermarket magnetic plug with an integral O-ring, follow the manufacturer’s guidance, however, the factory setup on this Toyota expects a separate crush washer.

What to watch for:

• Oily film or dampness around the drain plug a few days after a service.
• A washer that looks gouged, scored, or flattened unevenly.
• Needing extra force to “stop” a minor leak—usually a sign the washer’s past it.

Best practice for Aussie and Kiwi owners is straightforward: replace the sump plug washer at every oil change (typically every 10,000–15,000 km or 12 months, depending on driving conditions), use the correct-size Toyota-spec gasket (M12 application), clean the mating faces, and tighten to the published spec. It’s a cheap part that protects against leaks, mess on the driveway, and the risk of running the engine low on oil.

Does the 2012 Toyota Vitz/Yaris need a new sump plug washer at every oil change?

Yes. Toyota service literature for the XP130 Vitz/Yaris calls for a new drain plug gasket each time the plug is refitted. The crush washer is a one-use seal—reusing it can allow minor seepage and makes correct torque less reliable.

What size/part number is the sump plug washer for this model?

The washer is for an M12 drain plug. Toyota commonly supplies it as “Gasket, Oil Drain Plug” part number 90430-12031 (which supersedes 90430-12028) across the 1KR-FE, 1NR-FE, and 1NZ-FE engines used in the 2012 Vitz/Yaris. Using a genuine or quality equivalent ensures the right crush and seal.

What happens if the washer is reused or the wrong type is fitted?

Expect oily dampness around the plug, the odd drip on the driveway, and the risk of gradual oil loss. Over-tightening to compensate can strip sump threads. A correct, fresh washer tightened to the specified torque is the proper fix.