Parts for your 2017 Toyota Vitz|yaris-Sump plug washers

2017 Toyota Vitz/Yaris sump plug washers: what they are, why they matter, and when to swap them

Yes, the 2017 Toyota Vitz/Yaris does use a sump plug washer (also called a drain plug gasket). Toyota’s own technical information backs this up: the Toyota repair manual (TIS) for the 130-series Vitz/Yaris specifies installing a new “gasket, drain plug” whenever the engine oil is drained and refitted, and gives a tightening torque around 27 N·m for the drain plug. The Toyota electronic parts catalogue for the same models lists the oil drain plug gasket as a separate service part, commonly part number 90430‑12031 (an aluminium crush washer) for the 1.3 and 1.5 petrol engines used in this generation.

On this Vitz/Yaris, the sump plug washer is a small, soft-metal ring that sits under the head of the sump plug. When the plug is tightened, the washer “crushes” slightly to create a precise seal between the plug and the sump. That crush action is why it’s considered a single‑use item: once compressed, it won’t spring back perfectly next time, and reusing it can lead to weeping oil, drips on the driveway, or a plug that needs over‑tightening to seal—none of which anyone wants.

As part of regular servicing on a 2017 Vitz/Yaris, replacing the sump plug washer is quick, cheap insurance. It helps keep the sump threads safe by allowing the correct torque without gorilla force, and it prevents tiny leaks that can attract dust and grime or, over time, lower oil levels. It’s a small part doing an important job for engine longevity.

• Replace the sump plug washer at every oil change (typically every 10–15,000 km or 12 months, per the service schedule and local conditions).
• Use the correct crush-type washer for the model (Toyota often specifies M12 drain plug with gasket 90430‑12031, confirm by VIN if unsure).
• Hand‑thread the plug first to avoid cross‑threading, then torque to spec (about 27 N·m, per the Toyota repair manual for the 130‑series).
• Inspect the sump plug head and mating face, clean off old gasket material and grime before refitting.
• Avoid thread sealants or tape—if the correct washer is fitted and the torque is right, it will seal properly.

Technical sources: Toyota Repair Manual (TIS) for 2017 Vitz/Yaris (NCP/NSP/KSP130 series), Engine – Lubrication section, Toyota Electronic Parts Catalogue listing “Gasket, drain plug” for the 2017 Vitz/Yaris, commonly P/N 90430‑12031.

Popular questions

What size sump plug washer does the 2017 Toyota Vitz/Yaris use?

Most 2017 Vitz/Yaris petrol variants use an M12 drain plug with an aluminium crush washer such as Toyota P/N 90430‑12031. Because regional specs can vary, the safest bet is to match by VIN or take the plug to a parts counter to confirm.

Do you really need to replace the washer at every oil change?

Yes. The washer is designed to deform once to make a perfect seal. Reusing it risks minor leaks or needing excess torque to stop a weep, which isn’t great for the sump threads. A fresh washer each service keeps everything tidy and sealed.

What torque should the sump plug be tightened to?

The Toyota repair manual for the 130‑series Yaris/Vitz specifies roughly 27 N·m for the oil drain plug when used with the correct new washer. Always start the plug by hand to avoid cross‑threading, then torque it accurately.