Parts for your 2016 Toyota Crown-Sump plug washers

2016 Toyota Crown sump-plug-washers — are they used, and what owners should know

Yes, the 2016 Toyota Crown uses a sump plug washer (also called an engine oil drain plug gasket). Technical sources that cover the S210-series Crown (including ARS210, AWS210, GRS210 and GWS214) confirm a replaceable gasket at the engine oil drain plug. The Toyota Electronic Parts Catalogue lists “Gasket, drain plug” part no. 90430-12031 for these variants, and the Toyota Repair Manual procedure for Engine/Hybrid System – Oil and Filter – Replacement specifies installing a new drain plug gasket and tightening the plug to approximately 40 N·m. That makes the sump-plug-washers relevant and required on the 2016 Toyota Crown.

On this Crown, the sump plug washer is a simple aluminium crush gasket that deforms slightly when tightened. That controlled crush is what seals the plug against the alloy sump, preventing those annoying drips on the driveway. It’s a tiny, inexpensive part doing a big job — keeping fresh oil in and air out so the engine stays properly lubricated.

Best practice for servicing of your 2016-toyota-crown sump-plug-washers is straightforward: replace the gasket at every oil change. Once a crush washer has been compressed, it won’t spring back to provide the same seal next time. Reusing it risks seepage, a weeping plug, or over-tightening the plug to chase a seal — which can damage threads in the sump.

During an oil service, a tech will remove the plug, discard the old washer, wipe the mating face on the sump clean, fit a new 90430-12031 washer, then refit the plug and torque it to around 40 N·m. Using a torque wrench matters, going too tight can distort the washer excessively or stress the sump threads, whilst too loose can allow a slow leak.

Owners who like doing their own servicing should keep a small pack of genuine or equivalent-quality washers on hand. Mixed-material substitutes can work, but sticking with the correct Toyota-spec aluminium crush type avoids guesswork. If the plug has been off since the last service, if any oil mist is visible around the plug, or if the washer shows deep groove marks, replace it.

• Replace the washer at every oil change (typically 10,000–15,000 km or annually, per local schedule).
• Clean mating faces before installation.
• Tighten the plug to approximately 40 N·m with a torque wrench.

Technical sources: Toyota Electronic Parts Catalogue (S210 Crown, “Gasket, drain plug” 90430-12031). Toyota Repair Manual (S210 Crown, Engine/Hybrid System – Oil and Filter – Replacement, instruction to install new drain plug gasket and torque specification).

Popular questions

What size washer does the 2016 Toyota Crown sump plug use?
For S210-series Crowns, Toyota specifies the drain plug gasket 90430-12031, an aluminium crush washer for the M12 drain plug. Using the correct part ensures the right crush and a reliable seal.

How often should the sump plug washer be replaced on a 2016 Toyota Crown?
Replace it at every oil change. Once compressed, a crush washer won’t seal as reliably a second time. New washer, clean faces, and proper torque keep leaks at bay.

Can a copper washer be used instead of the Toyota aluminium type?
Copper can seal, but the Crown’s maintenance literature and EPC specify the Toyota aluminium crush type. For consistency, sealing performance and correct crush at the specified torque, sticking with 90430-12031 or an equivalent-quality aluminium washer is the safer choice.