Parts for your 2002 Toyota Altezza-Sump plug washers

2002 Toyota Altezza sump plug washers — what they do and when to replace

Yes, the 2002 Toyota Altezza uses a sump plug washer. Toyota’s own technical documentation backs this up: the Toyota Repair Manual for GXE10/SXE10 (Lubrication section) specifies refitting the drain plug with a new gasket, and the Toyota Electronic Parts Catalogue lists a “Gasket, drain plug” for the engine oil pan—commonly 90430-12031 (12 mm aluminium crush washer) used across 1G-FE and 3S-GE applications.

On the Altezza, the sump plug washer is a small, soft-metal crush gasket that sits between the drain bolt head and the oil pan. Its job is simple but vital—deform once on tightening to seal the joint and prevent weeping, drips, and air ingress. Because it crushes to create that seal, it’s designed as a one-use part. Reusing a flattened washer often leads to slow leaks, an oily underbody, and a messy driveway.

For routine servicing, it’s best practice to replace the washer every time the oil is changed. Toyota service literature states to “install a new gasket” when refitting the drain bolt, and that’s the easiest way to guarantee a clean, leak-free seal. The factory torque for the Altezza’s M12 drain bolt is typically around 39 N·m, avoid overtightening—let the fresh washer do the sealing.

• Recommended washer: Toyota 90430-12031 (12 mm aluminium crush type).
• Replace at every oil change, or any time the drain plug is removed.
• Don’t “double up” washers or reuse old ones—fit one new washer only.

Aluminium is the OEM style, but quality copper crush washers also work if sized correctly (M12). Most Toyota aluminium washers are symmetrical, if your aftermarket copper washer has a chamfered face, that side generally sits toward the bolt head. Clean the mating face on the pan, fit the new washer to the plug, snug it to spec, then check for leaks after the first drive.

If a new washer still seeps, look for nicks on the pan’s sealing land or damaged threads. Sorting the washer at service time is cheap insurance, and it keeps the 2002 Altezza tidy, compliant, and hassle-free on Aussie and Kiwi roads.

Popular questions about 2002 Toyota Altezza sump plug washers

Does the 2002 Altezza definitely need a sump plug washer, and what size is it?
Yes. Toyota specifies a new crush washer on refit. The commonly used OEM gasket is 90430-12031, a 12 mm aluminium washer to suit the M12 drain bolt used on GXE10/SXE10 engines.

How tight should the sump plug be on an Altezza?
About 39 N·m is typical for the M12 drain bolt used on the 1G-FE and 3S-GE. Always use a fresh washer and avoid overtightening—crushing the washer, not the threads, is what makes the seal.

Can a sump plug washer be reused if it looks fine?
Not recommended. Crush washers are single-use. Reusing them risks weeping and drips. In a pinch, some copper types can be annealed, but for the price of a new washer, replacement is the smarter move.