Parts for your 2006 Toyota Aurion-Sump plug washers

2006 Toyota Aurion sump plug washers

Based on technical sources, a sump plug washer is absolutely used on the 2006 Toyota Aurion (GSV40, 2GR‑FE). The Toyota Repair Manual (Lubrication – Oil and Filter) specifies the drain plug uses a crush-type gasket and gives a tightening torque of about 39–40 N·m. The Toyota Electronic Parts Catalog lists the drain plug gasket as an aluminium washer, part number 90430‑12031, for this engine. General service texts covering Camry/Aurion platforms (e.g., Haynes) also call for replacing the crush washer at oil changes.

On the 2006 Aurion, the sump plug washer is a small, single-use aluminium ring that sits between the oil pan and the drain plug head. Its job is to deform slightly when tightened, creating a reliable seal so engine oil doesn’t weep or drip. Because it crushes to seal, it’s designed to be replaced rather than reused.

For regular servicing, replacing the sump plug washer each oil change is best practice. It helps prevent leaks that can leave spots on the driveway, attract dirt around the sump, or, worst case, lead to gradual oil loss. If a reused washer doesn’t seal properly, owners sometimes over-tighten the plug to stop a slow weep, and that’s risky on an alloy sump. Stick to the spec torque (about 39–40 N·m) and let the fresh washer do the sealing.

The Toyota washer for this model is typically an M12 aluminium crush gasket. It’s inexpensive, easy to fit, and avoids headaches later. When the old oil drains, the old washer usually sticks to the plug—bin it and fit a new one with the clean drain plug. If the mating face on the sump has any nicks or debris, give it a gentle clean so the new washer sits perfectly flat.

Signs a new washer is needed outside routine service include a slight oil ring around the plug, a drip forming after shutdown, or a washer that looks deeply grooved or flattened. If the plug has been removed multiple times and the head or threads look tired, consider replacing the plug as well.

• Always use a quality aluminium crush washer (Toyota 90430‑12031 or equivalent).
• Tighten to about 39–40 N·m, don’t “nip it up” past spec.
• Check for leaks after the engine has warmed and cooled once.

Popular questions about 2006 Toyota Aurion sump plug washers

What size washer does the 2006 Aurion use?
The 2006 Aurion with the 2GR‑FE V6 uses an M12 aluminium crush washer. Toyota’s EPC lists the gasket as 90430‑12031. Dimensions vary slightly by brand, but it’s typically around 12 mm ID and sized to suit the factory drain plug.

How often should the sump plug washer be replaced?
Best practice is every oil change. The washer crushes to seal and won’t spring back reliably. Replacing it each service keeps the torque accurate and prevents small leaks.

What happens if the washer is reused or missing?
Reusing can lead to weeping or a slow drip, and people often over-tighten to compensate, risking sump damage. Running without a washer can cause immediate leaks and make proper torqueing impossible.