Parts for your 2007 Toyota Wish-Sump plug washers

2007 Toyota Wish sump plug washers

Yes, the 2007 Toyota Wish uses a sump plug washer (drain plug gasket). Technical sources back this up: the Toyota Electronic Parts Catalog (EPC) for first‑gen Wish models (ZNE10G/ANE10G series, 2007 build) lists a 12 mm “Gasket, Oil Drain Plug” under part number 90430‑12031. Toyota’s repair manuals for the 1ZZ‑FE and 1AZ‑FSE engines specify replacing the drain plug gasket whenever the plug is removed and tightening the plug to about 39 N·m. Those factory instructions make it clear the washer is a normal service item on this vehicle.

On a 2007 Toyota Wish, the sump‑plug washer is a small, single‑use crush gasket that sits under the drain plug head and seals the sump. Its job is simple but critical: stop hot engine oil from weeping past the threads, even after thousands of kilometres and plenty of heat cycles. Toyota’s aluminium 12 mm washer is designed to deform ever so slightly as the plug is tightened, creating a reliable seal without needing goop or over‑tightening. That’s why a fresh washer at service time matters just as much as the right oil and filter.

Best practice on this model is to replace the washer at every oil change. The original style (Toyota p/n 90430‑12031) is an aluminium crush type, quality aftermarket equivalents are fine as long as they’re the correct 12 mm spec and compress properly. The plug itself can usually be reused if the hex isn’t rounded and the threads are clean, but washers are considered consumables. When refitting, wipe the sump seat and plug face clean, install the new washer, and tighten the plug to around 39 N·m. Going tighter won’t “seal it better” — it can distort the washer, damage threads, or crack the sump.

If a Wish starts leaving a small oil spot under the car after a service, the usual culprits are a re‑used washer, debris on the sealing face, or under/over‑torque. Owners who service at home can keep a small pack of 12 mm washers on hand to avoid reusing old ones. It’s a cheap bit of kit that protects the sump, saves mess on the driveway, and keeps the engine happy between services.

• Replace the washer every oil change (10,000–15,000 km or annually, per local schedule).
• Use the correct 12 mm crush washer, avoid fibre or copper unless specified to suit.
• Torque the drain plug to about 39 N·m, don’t rely on “feel”.
• Check for drips after warm‑up and a quick run around the block.

Does a 2007 Toyota Wish definitely need a sump plug washer?

Yes. Toyota’s EPC lists a 12 mm drain plug gasket for the Wish, and the factory repair manual instructs replacement at each oil change. It’s part of the seal design and prevents leaks.

What size and part number is the washer for a 2007 Wish?

It’s a 12 mm aluminium crush washer. The common Toyota genuine part number is 90430‑12031. Quality aftermarket 12 mm equivalents that match the crush thickness profile will also work.

How often should it be replaced, and what torque is used?

Replace the washer at every oil change. Tighten the sump plug to about 39 N·m. Always clean the mating surfaces before fitting the new washer.