Parts for your 2018 Toyota Crown-Sump plug washers

2018 Toyota Crown sump plug washers — what they do and when to replace them

Yes, the 2018 Toyota Crown uses a sump plug washer (also called an oil drain plug gasket). Toyota’s own service literature for the Crown (S210 late and S220 early series, depending on market and build date) specifies refitting the drain plug with a new gasket at each oil change. The Toyota Electronic Parts Catalogue lists a “Gasket, Oil Drain Plug” for these engines, typically an aluminium crush washer such as 90430-12031 (commonly used with M12 drain bolts) or 90430-14008 (for M14 applications). Exact size varies by engine code, so it’s best checked by VIN.

• Technical sources referenced: Toyota Repair Manual (Crown S210/S220) – Engine Mechanical, Lubrication, instruction to “install drain plug with a new gasket”.
• Toyota Electronic Parts Catalogue (EPC) – listing for “Gasket, Oil Drain Plug” on 2018 Crown variants.
• Toyota Global Service Information (TIS) – general guidance to replace the aluminium drain plug gasket at each service.

On the 2018 Toyota Crown, the sump plug washer is a small aluminium crush ring that deforms slightly when the drain bolt is torqued. That tiny bit of give provides a positive seal between the bolt head and the alloy sump, keeping engine oil where it belongs. It’s a low-cost consumable, but it does a critical job.

As part of routine servicing, the washer should be replaced every oil change. Reusing it can lead to weeping around the plug, little drips on the driveway, or in the worst case, a gradual loss of oil. Given how inexpensive washers are, skipping this step just isn’t worth the risk.

Most Crowns of this year use an aluminium washer matched to either an M12 or M14 drain bolt. The correct size and Toyota part number can be confirmed by VIN. When the oil’s out, wipe the sump’s sealing face clean, fit a fresh washer to the plug, and reinstall the plug to the specified torque. For Toyota drain plugs of this era, the spec typically falls in the 30–40 N·m range for M12 and 35–50 N·m for M14 fasteners, but the exact value depends on engine code — always follow the figure in the factory manual or the under‑bonnet label. Over‑tightening can distort the washer or, worse, damage the sump threads.

After refilling with the right grade and litres of oil, run the engine, then check around the plug for any signs of seepage. No stacking of washers, no sealants, and no nylon or fibre substitutes — a single, correct aluminium crush washer is what Toyota specifies. Keeping a couple of genuine spares on the shelf makes life easy for the next service, whether it’s done at home with a torque wrench and a cuppa, or at a workshop.

Tip for hybrids: even though the engine runs less often, oil changes and washer replacement still go by time or kilometres, not just engine‑on hours.

Popular questions about 2018 Toyota Crown sump plug washers

What size sump plug washer does a 2018 Toyota Crown use?

It depends on the engine variant. Many 2018 Crowns use an M12 drain bolt with an aluminium crush washer commonly sold as Toyota 90430‑12031, while some variants use an M14 bolt that takes a washer like 90430‑14008. The sure‑fire way is to check by VIN in the Toyota EPC or match the washer to the drain bolt thread size.

If measuring at home, confirm the bolt’s thread (M12 vs M14) and use the correct Toyota washer, avoid generic oversize washers that can leak or loosen.

How often should the sump plug washer be replaced?

Every oil change. Toyota service procedures call for a new aluminium gasket each time the drain plug is refitted. It’s designed to crush once for a reliable seal.

Reusing the old washer can cause weeping or a slow drip. Given the low cost, it’s cheap insurance at every service interval.

What torque should the sump plug be tightened to on a 2018 Crown?

Follow the factory figure for your exact engine. Typical Toyota specs are around 30–40 N·m for M12 drain plugs and 35–50 N·m for M14. Using a torque wrench helps avoid over‑tightening, which can distort the washer or damage the alloy sump threads.

If the correct spec isn’t on hand, confirm it in the Toyota Repair Manual for your engine code or with a dealer using your VIN.