Parts for your 2006 Toyota Wish-Sump plug washers

2006 Toyota Wish sumpplugwashers — what they do and when to replace them

For the 2006 Toyota Wish, a sump plug washer is definitely used. Technical references including the Toyota Electronic Parts Catalogue (EPC) for ZNE10/ZNE14 (1ZZ-FE 1.8L) and ANE10/ANE11 (2AZ-FE 2.0L) show an oil drain plug gasket is fitted — commonly Toyota part number 90430-12031 (12 mm aluminium crush washer). Toyota workshop manuals for these engines also call for replacing the drain plug gasket whenever the engine oil is changed.

On this model, the sumpplugwasher sits under the oil drain (sump) plug and seals the plug to the alloy steel sump, preventing weeps and drips once the oil heats and cools. It’s a soft, deformable ring — usually aluminium on Toyotas — designed to crush slightly when the plug is torqued, filling tiny surface imperfections so the joint stays oil-tight.

Because it’s a crush washer, it’s treated as a single‑use part. Each time the plug is tightened to spec (typically about 39 N·m / 29 ft‑lb for the 1ZZ‑FE, around 39–40 N·m for the 2AZ‑FE), the washer compresses. Re‑using it can lead to seepage, rounded torque feel, or worse, over‑tightening the plug to chase a seal — not great for the sump threads. For routine servicing of a 2006 Toyota Wish, replacing the sumpplugwasher at every oil change is cheap insurance.

Owners or workshops in Australia and New Zealand will commonly fit either the genuine 90430‑12031 washer or an equivalent aftermarket M12 crush washer (aluminium, copper, or fibre). Aluminium tends to match the OE feel and torque feedback. Keep a few spares in the service kit so there’s never a reason to re‑use a flattened one.

Good practice for this vehicle:

• Replace the sumpplugwasher every oil change (10,000–15,000 km or 6–12 months, per local service schedule and driving conditions).
• Clean the sump plug and pan face, ensure no old washer is stuck to the sump.
• Tighten the drain plug with a torque wrench to the correct spec, don’t “gorilla” it.
• After the first drive, check for a film of oil around the plug, any weep means replace the washer and re‑torque.

Fitted correctly, the right sumpplugwasher keeps the Wish tidy under the bonnet and drip‑free on the driveway, making each service straightforward and stress‑free.

Popular questions about 2006toyotawish sumpplugwashers

What size sumpplugwasher does a 2006 Toyota Wish use?

The 2006 Wish with 1ZZ‑FE or 2AZ‑FE engines uses a 12 mm crush washer on the oil drain plug. The common genuine part is Toyota 90430‑12031. Aftermarket M12 aluminium or copper crush washers sized for Toyota applications will also fit.

How often should the sumpplugwasher be replaced on a 2006 Toyota Wish?

Replace it at every oil change. It’s a crush washer designed for single use, and swapping it each service helps maintain the correct torque and a proper seal without over‑tightening the plug.

Can the sumpplugwasher be re‑used if it looks okay?

It’s not recommended. Even if it looks fine, a used washer has already compressed and may not seal reliably once retorqued. A fresh washer is inexpensive and reduces the risk of leaks or thread damage from over‑tightening.