Parts for your 2016 Toyota Vitz|yaris-Sump plug washers

2016 Toyota Vitz/Yaris sump plug washers — what they do and when to replace

Based on Toyota technical literature, a sump plug washer is absolutely used on the 2016 Toyota Vitz/Yaris (XP130 series). The Toyota Repair Manual procedure for engine oil replacement specifies installing a new gasket to the drain plug at reassembly, and the Toyota Electronic Parts Catalogue (EPC) lists an aluminium crush-type drain plug gasket for the model. It’s commonly shown under Toyota part number 90430-12031 (M12 drain plug gasket) on 1NR-FE and 1NZ-FE engines fitted to 2016 Vitz/Yaris variants. That makes the sump plug washer a standard, service-relevant item on this vehicle.

On this Yaris, the sump plug washer’s job is simple but critical: it crushes slightly as the drain bolt is torqued, creating a reliable seal between the plug and the alloy sump. This prevents weeping or leaks after an oil change and helps maintain correct oil pressure and cleanliness over time. Because it deforms when tightened, it’s considered a single-use item.

As part of routine servicing, the washer should be replaced at every oil change. Reusing a flattened or marked washer can lead to slow seepage, wetness around the plug, or, if over-tightened to compensate, damaged threads in the sump—none of which is fun or cheap to sort. Most techs will also clean the drain plug threads, check the magnet (if fitted) for debris, and torque the plug correctly. Typical Toyota drain plug torque for small petrol engines sits around 25–30 N·m (often cited ~27 N·m), but always follow the exact spec in the applicable Toyota service info for the specific engine code.

Genuine Toyota washers are aluminium and fit neatly to the OE plug. Quality aftermarket options in aluminium (and sometimes copper) are fine if the dimensions match the OE spec. If the vehicle has seen a replacement sump or non-standard drain bolt, confirm the bolt diameter and thread to ensure the washer ID and seat profile are right.

• Replace the washer at each oil change, no exceptions.
• Inspect for seepage after the first few drives post-service.
• Use a torque wrench—don’t “nip it up” by feel.
• Keep a small pack of correct-size washers in the glovebox or toolbox.

Done properly, the little washer saves a lot of mess and keeps the 2016 Vitz/Yaris happy between services.

Popular questions

What size sump plug washer does a 2016 Toyota Vitz/Yaris use?

Most 2016 Vitz/Yaris models with 1NR-FE or 1NZ-FE engines use an M12 drain plug with an aluminium crush washer commonly referenced as Toyota 90430-12031. Because engine and market variants exist, it’s smart to confirm by VIN or checking the old plug/washer size before buying.

How often should the sump plug washer be replaced?

Replace it at every oil change. The washer is designed to crush once to form a perfect seal. Reusing it risks drips or overtightening the plug, which can damage the sump threads. Keeping a couple of spares on hand makes life easier at service time.

What torque should the drain plug be tightened to?

For the 2016 Yaris, the drain plug is typically tightened to about 25–30 N·m (often ~27 N·m). Always use the specific torque listed in the Toyota service information for the exact engine in the car. A torque wrench and a fresh washer are the best combo for a leak-free result.