Parts for your 2006 Toyota Vitz|yaris-Sump plug washers

2006 Toyota Vitz/Yaris sump plug washers

A sump plug washer is used on the 2006 Toyota Vitz/Yaris. Toyota’s own technical literature confirms it: the Repair Manual for Vitz/Yaris NCP90/NCP91 (Engine Mechanical – Lubrication) specifies installing the drain plug “with a new gasket,” and the Toyota Electronic Parts Catalogue lists the drain plug gasket (commonly 90430-12031, M12 aluminium) for 1NZ‑FE and related engines. That means this model relies on a crush-type washer to seal the sump plug properly at every oil change.

On this Vitz/Yaris, the sump plug washer’s job is simple but critical: it’s a soft aluminium ring that deforms once when the plug is tightened, filling microscopic gaps between the plug flange and the sump face. That one-time “crush” prevents weeping and protects the sump threads from over-tightening. Without a good washer, owners can see slow oil drips, messy undertrays, or worse, a loose plug over thousands of kilometres.

Because it’s a single-use crush ring, the best practice is to replace the washer at every oil change. Toyota’s service procedure calls for fitting a new gasket and tightening the plug to the specified torque, typical Toyota spec for the M12 drain plug on these engines is around 27 N·m, but it’s smart to confirm by engine code and service data. A fresh washer plus the right torque gives a reliable, leak-free seal without having to lean on the spanner. The aluminium washer is symmetrical, so there’s no special orientation during install.

• If there’s any oil mist or drip at the plug, replace the washer—don’t just re-tighten.
• Clean the sump sealing face and plug flange before refitting, grit can cause seepage.
• Use a quality aluminium washer (Toyota 90430‑12031 or equivalent M12 crush washer). Keep a couple on hand, they’re inexpensive.
• A 14 mm spanner or socket typically fits the plug head, but the sealing size is M12 for the washer.

Some cars turn up with copper or fibre washers from past services, while they can seal if sized correctly, Toyota specifies an aluminium crush washer for this model. Sticking with the correct M12 aluminium gasket and the proper torque keeps the 2006 Vitz/Yaris tidy, compliant with Toyota guidance, and free from the annoying oil spots on the driveway.

Popular questions about 2006 Toyota Vitz/Yaris sump plug washers

What size sump plug washer does a 2006 Vitz/Yaris use?
Most 2006 Vitz/Yaris models with the 1NZ‑FE use an M12 aluminium crush washer, commonly Toyota part number 90430‑12031 (also seen as 90430‑12028 in some catalogues). The plug head usually takes a 14 mm spanner, but the sealing size for the gasket is M12. Always confirm by VIN or engine code if unsure.

How often should the sump plug washer be replaced?
Every oil change. Toyota’s Vitz/Yaris repair procedures specify fitting the drain plug with a new gasket each time. Reusing a crushed washer risks seepage, under‑torquing, or over‑tightening to chase a seal.

What torque should the sump plug be tightened to?
Around 27 N·m is typical for the M12 drain plug on these engines. Verify against the service manual for the specific engine code to be precise. Avoid over‑tightening—let the fresh washer do the sealing.