Parts for your 2010 Toyota Vitz|yaris-Sump plug washers

2010 Toyota Vitz/Yaris sump-plug-washers

Technical sources confirm that the 2010 Toyota Vitz/Yaris is fitted with a replaceable sump plug washer (also called an oil drain plug gasket). Toyota’s Repair Manual for the 2005–2011 Vitz/Yaris (NCP9#/KSP90) in the Toyota Technical Information System instructs to “install the drain plug with a new gasket,” and the Toyota Electronic Parts Catalog lists the genuine gasket as 90430‑12031 (aluminium, 12 mm). Typical drain plug tightening for these engines is about 39–40 N·m, as per Toyota service data for the XP90 series.

On this Vitz/Yaris, the sump-plug-washers do a simple but vital job: they crush slightly as the drain plug is tightened, creating a reliable seal between the plug and the alloy sump. That crush action takes up tiny imperfections on the mating faces, keeps engine oil where it belongs, and lets the plug reach the correct torque without needing to lean on the spanner. It also helps prevent slow weeping that can leave spots on the driveway or, worse, drop oil level over time.

Because the washer is a single-use crush design, Toyota’s guidance is to replace it at every oil change. For owners servicing their 2010 Toyota Vitz/Yaris in Australia or New Zealand, that typically means fitting a new gasket every 10,000–15,000 km or 6–12 months, depending on the chosen service schedule. Reusing a flattened washer can lead to seepage, the need to overtighten the plug, and possible thread or sump damage.

Good practice for servicing of their 2010-toyota-vitz-yaris sump-plug-washers includes checking the old washer for deep ridges, galling or deformation, cleaning the sump’s sealing face, and fitting a fresh aluminium gasket (Toyota 90430‑12031 or a quality equivalent). Hand-start the plug to avoid cross-threading, then torque it to spec—about 39–40 N·m for the XP90 engines. After a warm-up, inspect for any film of oil around the plug. If the hex is rounded or the threads feel gritty, replace the plug as well, they’re inexpensive insurance against future leaks.

Owners keen on DIY should avoid thread sealants or PTFE tape here—the crush washer does the sealing. Keep a small pack of genuine or OE-quality 12 mm aluminium washers on the shelf so a fresh one goes in with every 3.7–4.2 litre oil change, depending on engine. It’s a cheap, quick step that keeps the Yaris/Vitz tidy, leak-free and easy to service the next time around.

• Washer type and size: 12 mm aluminium crush washer (Toyota 90430‑12031)
• Fitment note: Always replace, don’t reuse a crushed washer
• Tightening: Torque the drain plug to about 39–40 N·m

What size sump plug washer does a 2010 Toyota Vitz/Yaris use?

It uses a 12 mm aluminium crush washer. The common Toyota genuine part number is 90430‑12031, listed in the Toyota Electronic Parts Catalog for XP90 Vitz/Yaris engines. Some aftermarket options are copper or aluminium—stick with a quality OE-equivalent and confirm by VIN if unsure.

Can the sump plug washer be reused on this model?

It’s designed as a single‑use crush washer. Toyota’s repair manual guidance is to install the drain plug with a new gasket at each oil change. Reusing it risks slow leaks and can tempt over‑tightening, which may damage the plug or sump threads.

What’s the correct torque for the drain plug on a 2010 Vitz/Yaris?

Around 39–40 N·m for the XP90-series engines. Always verify for the exact engine code in Toyota TIS, but staying in that window protects the threads, achieves the crush on the washer, and keeps the seal oil‑tight.