Parts for your 2017 Subaru Exiga-Sump plug washers

2017 Subaru Exiga sump plug washers — what they are and why they matter

Technical verdict: the 2017 Subaru Exiga (including the Crossover 7 variant) absolutely uses a sump plug washer. Subaru’s FB‑series engine workshop manuals call for a single‑use aluminium crush washer on the engine oil drain plug and specify replacing it at each oil change. The Subaru Electronic Parts Catalogue lists this as the Gasket – Drain Plug (commonly part no. 803916010, M16), used across FB20/FB25 applications. Owner’s maintenance guides for these models also note renewing the drain plug gasket and tightening the plug to around 43–44 N·m. These sources confirm the washer is relevant and fitted from factory.

On this Exiga, the sump plug washer’s job is straightforward but vital: it compresses as the drain plug is torqued, creating a positive seal between the plug flange and the sump. That crush action evens out tiny surface imperfections, stops those annoying weeps, and protects the alloy sump from over‑tightening dramas. Being soft aluminium, it’s designed as a one‑time seal—reusing it can lead to seepage, stripped threads, or the temptation to swing on the spanner a bit too hard.

Good servicing practice for a 2017 Subaru Exiga is to fit a new washer every oil change (typically 10,000 km or 12 months in AU/NZ conditions, or as per the service schedule). The correct washer is an M16 aluminium crush type. Tighten the drain plug to about 43–44 N·m—enough to fully crush the gasket without bruising the sump. A wiped‑clean sealing face, a fresh washer, and the right torque are the trifecta for a dry underside.

• Tell‑tales a washer needs replacement: oil mist around the plug, a drip forming after a drive, or a visibly flattened/grooved old washer.
• Copper alternatives can work if sized correctly, but Subaru specs aluminium, stick with OE‑style for consistent crush and torque feel.
• Most Subaru M16 washers are flat both sides, so orientation isn’t critical—just ensure the faces are clean.

With the Exiga’s FB‑series engine, keeping to a fresh washer and the factory torque spec delivers a simple, leak‑free service. It’s a cheap part that prevents costly messes and keeps the vehicle tidy and compliant for roadworthy checks.

FAQs

What size sump plug washer does a 2017 Subaru Exiga use?
The Exiga uses an M16 aluminium crush washer commonly listed by Subaru as Gasket – Drain Plug, part number 803916010. It’s the standard OE‑style washer for FB‑series engine oil pans on this model.

How often should the sump plug washer be replaced on a 2017 Exiga?
Replace it at every engine oil change—generally every 10,000 km or 12 months in Australian and New Zealand conditions, unless the service schedule specifies otherwise. It’s a single‑use crush washer.

What’s the correct torque for the Exiga’s sump plug?
Tighten the drain plug to about 43–44 N·m with a new washer fitted. That provides the intended crush and sealing without risking damage to the alloy sump.