Parts for your 2017 Toyota Wish-Sump plug washers

2017 Toyota Wish sump plug washers: what they do and when to replace them

For the 2017 Toyota Wish (ZGE2# series with 2ZR-FAE/3ZR-FAE engines), a sump plug washer is absolutely used. Toyota’s Electronic Parts Catalogue and the ZGE2# Repair Manual specify a replaceable aluminium crush gasket for the engine oil drain plug (commonly listed as Toyota part number 90430-12031, with typical supersessions such as 90430-12028). Those same factory sources also note the washer should be renewed at each oil change, and specify a drain plug torque around 39 N·m. So yes—this model runs a sump plug washer, and it’s a routine service item.

On this Wish, the sump plug washer’s job is simple but critical: it’s a soft, deformable seal that crushes slightly as the plug is torqued, taking up tiny imperfections between the plug and the sump. That prevents weeping, cold-start drips, and heat-cycle leaks. Because it’s an aluminium crush type, it’s designed as single-use, once compressed, it won’t spring back or seal consistently a second time.

As part of regular servicing, the washer should be replaced at every oil and filter change. Skipping it can lead to slow leaks that leave spots under the car or oil film on the undertray. Genuine Toyota washers are inexpensive and match the drain plug seat perfectly, while reputable aftermarket equivalents also work fine if they’re the correct size and material for the M12 Toyota plug.

• Always fit a new washer, don’t stack washers or reuse the old one.
• Wipe the sump face and plug head clean before refitting.
• Tighten the plug to the factory spec (about 39 N·m). Over-tightening can distort the seat or crack the washer, under-tightening can cause seepage.
• If a washer has a chamfered side, follow the supplier’s note, most flat aluminium washers are non-directional.
• After the first drive, have a quick look for any fresh oil around the plug—just to be safe.

If there’s stubborn weeping even with a new washer and correct torque, check for a nicked sump sealing face, a burred plug, or a mismatched washer size. A fresh genuine plug is cheap insurance if the old one’s been over-tightened in the past. Keeping that small gasket in good nick helps the 2017 Wish stay tidy, compliant, and drama-free between services.

Popular questions about 2017 Toyota Wish sump plug washers

What size sump plug washer does the 2017 Toyota Wish use?

The 2017 Wish uses an aluminium crush washer for an M12 drain plug as listed in Toyota’s EPC for ZGE2# models. Genuine Toyota gaskets commonly come under part number 90430-12031 (with noted supersessions in some catalogues). Using the correct M12 Toyota-style washer ensures the seat matches and the crush characteristics are right for the specified torque.

If buying aftermarket, select an M12 aluminium crush washer marketed for late-model Toyota applications. Avoid copper or fibre unless the supplier specifically lists compatibility for the ZGE2# Wish.

How often should the sump plug washer be replaced?

Replace it at every oil change. Toyota’s service literature for the ZGE2# platform treats the drain plug gasket as a single-use item, intended to be renewed each time the plug is removed. It’s inexpensive, prevents nuisance leaks, and supports correct torque accuracy.

If the plug has been removed for any reason between services, fit a new washer again on reassembly.

Can the sump plug washer be reused if it looks fine?

Best practice is no—don’t reuse it. Aluminium crush washers permanently deform on first torque. Reusing them can cause under-sealing, over-torque to compensate, or gradual seepage after a few heat cycles.

If a prior service reused the washer, keep an eye out for dampness around the plug and replace it at the next opportunity with the proper Toyota-spec M12 gasket.