Parts for your 2019 Toyota Vitz|yaris-Sump plug washers

2019 Toyota Vitz/Yaris sump plug washers

Yes, the 2019 Toyota Vitz/Yaris uses a sump plug washer. Toyota’s Electronic Parts Catalogue lists an oil drain plug gasket (commonly p/n 90430-12031, a 12 mm aluminium crush washer) for the XP130-series Vitz/Yaris range, and the Toyota repair manual procedure for engine oil replacement specifies installing a new drain plug gasket at each refit. Those technical sources confirm the washer is fitted and intended to be replaced during routine servicing.

What’s the washer actually doing? It’s a soft, crushable gasket that sits between the drain plug head and the sump. When the plug is tightened, the washer deforms to fill microscopic gaps, creating a fluid-tight seal so engine oil doesn’t weep past the threads or flange. Because it crushes to seal, it’s effectively single-use. Reusing a flattened washer can lead to slow leaks, dirty driveway spots, or—worse—under-torquing or over-torquing to try and “make it seal”.

On a 2019 Vitz/Yaris, best practice is to replace the sump plug washer at every oil change. Stick with a genuine Toyota washer or a quality aftermarket equivalent that matches the dimensions (M12 drain plug, 12 mm ID, correct thickness). Aluminium is most common, copper types also work, but make sure the seating faces are clean and flat. If the old washer is stuck to the sump, gently remove it so the new one seats properly.

Handy servicing tips for this model:

• Clean the plug and sump sealing face before refitting the new washer.
• Tighten the drain plug to the workshop-manual torque—around 27 N·m for the typical Vitz/Yaris small petrol engines. Don’t overdo it, the washer provides the seal.
• Start the engine, let it idle, then check underneath for any weeping. Recheck after a short drive.
• If the plug feels loose or the threads look suspect, replace the plug, if the sump threads are damaged, address that promptly to avoid bigger hassles.

Look after the washer and the drain plug, and the little Yaris/Vitz will keep its oil where it belongs—inside the engine, not on the driveway. It’s a cheap part that does a big job, so swapping it at service time is a no-brainer.

FAQs

What size sump plug washer does a 2019 Vitz/Yaris use?
It typically uses a 12 mm aluminium crush washer on the M12 drain plug. Toyota commonly lists the gasket as part number 90430-12031 for the XP130-series Yaris/Vitz. In some markets, 90430-12028 appears, the critical point is matching the 12 mm size and style.

How often should the sump plug washer be replaced?
Every oil change. Because it’s a crush washer, it deforms to seal once. Reusing it risks seepage, overtightening, or damage to threads. A fresh washer each service keeps things tidy and leak-free.

What’s the correct torque for the drain plug?
For the common small petrol engines in the 2019 Vitz/Yaris (such as 1NR-FE/1NZ-FE families), the drain plug torque is about 27 N·m. Always start the plug by hand, seat the new washer squarely, and torque it with a calibrated wrench. If unsure, check the exact engine variant’s workshop manual.