Parts for your 2008 Subaru Exiga-Sump plug washers

2008 Subaru Exiga sump plug washers — what’s fitted and how to look after them

Yes, the 2008 Subaru Exiga does use a sump plug washer. Subaru’s own technical materials confirm it: the Exiga (YA series, EJ-engine variants) specifies a replaceable aluminium crush gasket under the engine oil drain plug. The Subaru Exiga Service Manual (Engine – Lubrication), the Subaru FAST parts catalogue, and typical owner’s manual guidance all note a new drain plug gasket should be fitted at each oil change. The commonly listed Subaru part is a 20 mm aluminium crush washer (often referenced as p/n 11126AA000), with the drain plug torque typically specified around 44 N·m for EJ engines.

On this Exiga, the sump plug washer’s job is dead simple but super important: it crushes as the plug is torqued up, creating a reliable seal between the plug head and the sump face. That controlled “crush” compensates for tiny imperfections, so there’s no weeping or drips after the service. Because the washer deforms to seal, it’s considered single‑use. Re-using it can lead to slow leaks, messy undertrays, and a film of oil on the sump that makes fault-finding a pain.

As part of routine servicing, it’s good form to replace the sump plug washer every time the oil’s changed. For most Aussie and Kiwi drivers, that’s roughly every 10,000 km or 12 months, or as per the maintenance schedule for the specific engine. Use the correct-size aluminium crush washer, clean the sump sealing face, thread the plug by hand first to avoid cross-threading, then torque it to spec (around 44 N·m for EJ-equipped Exiga models). Skip the rattle gun—over-tightening can distort the washer or damage the sump.

• Always use a fresh aluminium crush washer—don’t stack old ones.
• If swapping to aftermarket pans or plugs, match the washer size and material.
• After the first heat cycle post-service, have a quick look for any tell-tale weeps.
• Keep a couple of spare genuine-spec washers in the glovebox or tool kit—handy and cheap insurance.

Copper washers pop up in the aftermarket, but Subaru’s documentation for EJ engines in this era points to aluminium, which crushes consistently at the specified torque. Sticking with the OEM-style washer keeps things leak-free and drama-free for the 2008 Subaru Exiga.

FAQ: 2008 Subaru Exiga sump plug washers

What size washer does the 2008 Subaru Exiga use?
Most EJ-engine Exiga models use a 20 mm aluminium crush washer under the drain plug (commonly referenced as Subaru p/n 11126AA000). If there’s any doubt, match by VIN or measure the existing plug and washer before servicing.

How often should the sump plug washer be replaced?
Every oil change. Because the washer is designed to deform once, reusing it risks weeping and underbody mess. Given the low cost, swapping it each service is the sensible, workshop-standard approach.

What torque should the Exiga’s drain plug be tightened to?
For EJ engines fitted to the 2008 Exiga, the service literature typically specifies about 44 N·m. Use a torque wrench on a clean, lightly oiled thread, and avoid over-tightening. If a non-standard sump or plug is fitted, check the manufacturer’s spec.