Parts for your 2015 Subaru Exiga-Sump plug washers

2015 Subaru Exiga sump plug washers: do you need one?

Technical sources confirm the 2015 Subaru Exiga does use a replaceable sump plug washer (also called an oil drain plug gasket). Subaru’s service procedures in the Subaru Technical Information System (STIS) for the EJ/FB engines specify “fit a new drain plug gasket at every oil change,” and the Subaru FAST electronic parts catalogue lists an aluminium crush washer for the Exiga’s engine oil drain plug (commonly referenced as 803916010 or, in some variants, 11126AA000). The owner’s manual oil-change directions echo the same replace-once guidance.

On the 2015 Subaru Exiga, the sump plug washer’s job is simple but critical: it crushes slightly as the plug is torqued, creating a tight seal between the plug and the alloy sump. That one-time “crush” stops weeping, keeps the driveway clean, and protects the engine from running low on oil between services. Because it deforms to seal, it’s a single-use item. Reusing it can mean a slow seep or the temptation to overtighten the plug—neither is ideal for the sump threads.

As part of routine servicing, this little ring is cheap insurance. Each oil change, the technician removes the old washer, checks the plug’s threads and sealing face, fits a fresh genuine-spec aluminium crush washer, then torques the plug to the factory spec listed in the service manual. No need to guess—just do it once and right.

Owners of Exiga models, including Crossover 7 variants, can expect a like-for-like washer across the range, Subaru’s EPC shows a dedicated drain plug gasket for these engines. While many aftermarket options exist, sticking to a Subaru-spec aluminium crush washer avoids mismatched thicknesses or hardness that can alter torque feel and sealing performance.

Good practice for the Exiga’s sump plug washer at service time:

• Always replace the washer at every oil and filter change.
• Wipe the sump’s sealing face clean and inspect the plug for burrs.
• Use a quality aluminium crush washer to the correct Subaru spec.
• Tighten the plug with a torque wrench to the workshop manual specification.
• After the fill and run-up, check for any weeping and top up if required.

For those in Australia and New Zealand, where driving can mean long kilometres and varied conditions, treating the washer as a one-time consumable keeps the Exiga’s engine protected and servicing neat and drama-free.

How often should the sump plug washer be replaced on a 2015 Subaru Exiga?

It should be replaced at every oil change. Subaru’s service guidance treats the aluminium crush washer as single-use. Whether servicing at 10,000 km or 12 months (or sooner under severe use), fit a new washer each time to maintain a proper seal and avoid drips.

What size or part number sump plug washer fits a 2015 Subaru Exiga?

Subaru’s parts catalogue lists an aluminium crush washer for this model, commonly referenced as 803916010, with some variants noting 11126AA000. Because engines and markets can vary, the best bet is to confirm by VIN or with a dealer/parts specialist to ensure the correct Subaru-spec washer.

Can the washer be reused, or can a copper washer be used instead?

Reusing the old washer isn’t recommended—it has already deformed and may not seal again. A quality copper crush washer can work if it matches Subaru’s dimensions and crush characteristics, but the safest option is the Subaru-spec aluminium washer fitted to the correct torque.