Parts for your 2022 Mitsubishi Outlander-Sump plug washers

2022 Mitsubishi Outlander sump-plug-washers: what they do and when to replace them

Based on technical sources including the Mitsubishi Motors Outlander (GN) Workshop Manual – Engine Lubrication section, the Mitsubishi ASA electronic parts catalogue, and service information for the Nissan PR25DD engine used in the 2022 Outlander, the engine sump (oil pan) drain plug is designed to be used with a replaceable crush washer. That means sump-plug-washers are absolutely relevant and fitted on the 2022 Mitsubishi Outlander.

On this model, the sump-plug washer is a small, soft-metal gasket that sits between the drain plug head and the sump face. Its job is simple but vital: it deforms slightly as the plug is tightened, creating a reliable seal that keeps engine oil where it belongs and prevents those annoying drips on the driveway. Because it’s a crush-style washer (usually aluminium or copper), it’s made to be used once. Reusing it can lead to weeps, under-torque or over-torque, and—worst case—stripped threads if someone chases a seal by overtightening.

For owners and workshops looking after a 2022 Outlander, the best practice is to replace the sump-plug washer at every engine oil service. It’s a cheap part that protects a very expensive engine. When the oil is drained, the old washer should be removed from the plug and a new washer fitted before reinstalling the plug and tightening to the service manual’s specified torque. Avoid rattle-guns on the drain plug, a quality torque wrench and a clean sealing surface are the go.

Signs a washer needs attention include a light oil mist around the plug, a drop forming after a drive, or a fresh oil smell. If any of these pop up after an oil change, don’t ignore them—inspect, clean, and refit with a new washer and the correct torque. For parts choice, stick with OE-equivalent crush washers matched to the Outlander’s drain plug size. While many 2.5-litre Outlander variants use a washer commonly shared with Nissan applications, it’s smart to confirm the exact washer spec by VIN or the service information for the specific engine code fitted to the vehicle.

• Replace the sump-plug washer at every oil and filter change.
• Use the correct crush washer material and size specified for the vehicle.
• Tighten the drain plug to the service manual torque—no more, no less.

Popular questions about 2022 Mitsubishi Outlander sump-plug-washers

Does the 2022 Outlander actually use a sump-plug washer?

Yes. Factory service information for the 2022 Outlander (GN) calls for a replaceable drain plug gasket (crush washer) whenever the engine oil is drained and the plug is refitted. It’s designed to deform once to create a proper oil-tight seal.

How often should the sump-plug washer be changed on a 2022 Outlander?

Every oil change. Because it’s a crush-style washer, it’s not meant to be reused. Swapping it each service helps prevent weeps and avoids the temptation to overtighten the plug to stop a leak.

What washer type and size does it take?

Most 2022 Outlander 2.5-litre variants use an OE-spec aluminium or copper crush washer sized to the factory drain plug. Sizes can vary by engine and market, so check the owner’s manual, workshop manual, or parts catalogue by VIN to get the correct washer before servicing.