Parts for your 2020 Toyota C-hr-Sump plug washers

2020 Toyota C‑HR sump plug washers

Yes — the 2020 Toyota C‑HR uses a sump plug washer. Technical sources including the Toyota Repair Manual for C‑HR (AX10/AX50 series) under Engine/Lubrication, and Toyota’s Electronic Parts Catalogue for the oil pan/drain plug assembly, specify a new “gasket, drain plug” to be fitted at each oil change. Common Toyota Genuine part references for this C‑HR application are a 12 mm aluminium crush washer (often listed as 90430‑12031). Major Australasian fitment catalogues also list a 12 mm alloy sump plug washer for C‑HR from 2016 onwards, reinforcing that it’s a standard, serviceable item on this model.

On the C‑HR, the sump plug washer’s whole job is to provide a reliable, leak‑free seal between the drain plug head and the sump. The soft aluminium ring compresses (or “crushes”) when the plug is torqued, conforming to tiny imperfections in the mating faces. That controlled crush creates the seal without needing excessive force, which helps protect the sump threads and makes future servicing straightforward.

Because it’s designed to deform once, the washer should be replaced at every engine oil service. Re‑using a crushed washer risks oil weeping, seepage under pressure and the temptation to over‑tighten the plug to chase a seal. Given the washer costs next to nothing, it’s an easy win for long‑term reliability and tidy underbody components.

Best practice for a 2020 Toyota C‑HR oil change:

• Remove and discard the old washer — check it’s not stuck to the sump face before refitting.
• Clean the sealing surfaces on the sump and plug, fit a new 12 mm aluminium crush washer.
• Tighten the drain plug to the factory spec (Toyota service data for C‑HR cites approximately 39–40 N·m). Avoid overtightening.
• Don’t stack washers or use thread sealants, the washer does the sealing.
• Use OEM or quality equivalent washers to maintain correct crush and sealing height.

Whether the local C‑HR runs the 1.2‑litre turbo or 2.0‑litre petrol, the approach is the same: fresh oil, new filter and a new crush washer each time. It keeps the sump dry, the driveway clean and the servicing by the book — exactly how Toyota’s own literature specifies it for Australasian vehicles.

What size sump plug washer does a 2020 Toyota C‑HR use?

It takes a 12 mm aluminium crush washer for the engine oil drain plug. Toyota Genuine listings commonly note 90430‑12031. Variations can exist by engine code and market, so if in doubt, confirm by VIN against the parts catalogue.

How often should the C‑HR sump plug washer be replaced?

Every engine oil change. The washer is single‑use, Toyota service documentation calls for a new drain plug gasket on reassembly to guarantee proper sealing and torque retention.

Can a reusable washer be fitted instead of the crush type?

It’s not recommended. The C‑HR’s plug and sump are designed for a single‑use aluminium crush washer. Reusable or different‑style seals can alter clamping load or seating height, raising the risk of leaks or overtightening. Stick with OEM‑style crush washers or a quality equivalent.