Parts for your 2010 Toyota Aurion-Sump plug washers

2010 Toyota Aurion sump-plug-washers — what they do and when to replace

For the 2010 Toyota Aurion (GSV40R, 2GR‑FE V6), a sump-plug-washer is absolutely used. Toyota’s Repair Manual for the 2GR‑FE lubrication section specifies replacing the drain plug gasket at each oil change, and the Toyota Electronic Parts Catalogue (Aurion GSV40R, Engine > Oil Pan) lists the oil drain plug gasket as part number 90430‑12031 (12 mm aluminium crush washer). The factory torque for the drain plug is around 39 N·m. Those technical sources make it clear this washer is a standard, service-replaceable sealing part on this vehicle.

On the Aurion, the sump-plug-washer is the simple, cheap bit that keeps engine oil where it belongs. It’s a soft aluminium crush washer that deforms slightly as the drain plug is torqued, creating a reliable seal between the plug and the sump. That crush action prevents weeping and protects the sump face and plug threads from needing brute-force tightening. Because it’s designed to deform once, Toyota treats it as a consumable — fit a fresh one at every service.

Skipping or reusing a tired washer can lead to those annoying oil drips on the driveway, oily undertrays, and the temptation to overtighten the plug. Over‑torquing risks stripping threads in the alloy sump, which is a much pricier headache than a new gasket. Using the correct 12 mm Toyota-style aluminium washer (PNC 90430‑12031 or quality equivalent) and tightening to spec is the neat, OEM way to do it.

• Replace the sump-plug-washer at every oil change — it’s a low-cost part that prevents leaks.
• Clean the sump sealing face and plug head, bin any washer that’s nicked, flattened, or grooved.
• Avoid thread tape or sealants, they’re not required when the correct crush washer and torque are used.
• Tighten the plug to about 39 N·m, don’t “swing off” the ratchet — the washer does the sealing.
• If a previous washer has stuck to the sump, gently remove it so the new one can seat properly.

For owners who like to DIY, keeping a small stash of genuine or high-quality aftermarket 12 mm aluminium washers makes servicing straightforward. For workshop servicing, asking the tech to note “fit new drain plug gasket” on the job card is a tidy way to ensure the Aurion stays clean, dry, and happy between oil changes.

Popular questions about 2010 Toyota Aurion sump-plug-washers

Does a 2010 Aurion need a new sump-plug-washer every service?
Yes. Toyota’s service guidance for the 2GR‑FE specifies fitting a new drain plug gasket whenever the oil is changed. It’s inexpensive insurance against leaks and helps avoid overtightening the plug.

What size is the sump-plug-washer on a 2010 Aurion?
It uses a 12 mm aluminium crush washer, commonly referenced by Toyota as part number 90430‑12031. Torque the drain plug to roughly 39 N·m for a proper seal.

Can a copper or reusable washer be used instead?
Some copper washers will seal if they’re the correct 12 mm size and properly annealed, but Toyota specifies an aluminium crush type. Reusable O‑ring or bonded seal plugs are only suitable if the plug system is designed for it, otherwise stick with the OEM-style aluminium gasket.