Parts for your 2010 Nissan Pathfinder-Sump plug washers

2010 Nissan Pathfinder sump plug washers

Based on the Nissan Pathfinder (R51, 2010) Factory Service Manual and Nissan FAST Electronic Parts Catalogue, this model does use a sump plug washer. The FSM’s lubrication procedures specify refitting the drain plug with a new washer at each oil change, and the EPC lists a 14 mm crush washer (commonly referenced as Nissan P/N 11026-01M02 or 11026-JA00A) for R51 engines such as the VQ40DE petrol and YD25 diesel. That means sump plug washers are absolutely relevant on a 2010 Nissan Pathfinder.

On this Pathfinder, the sump plug washer is a small, soft-metal “crush” ring that sits under the engine oil drain plug. Its job is simple but vital: when the plug is tightened, the aluminium or copper washer deforms to create a gas- and oil-tight seal between the plug head and the sump. That controlled crush also spreads the load, helping protect the sump’s sealing face and making the torque more predictable. Skipping the washer or reusing a flattened one is a fast track to weeping oil, a plug that loosens off, or an overtightened plug that risks damaging the pan threads.

Servicing advice for Aussie and Kiwi owners is straightforward: replace the washer at every oil change. Nissan’s workshop guidance treats the washer as single-use, because once it has crushed, it won’t seal the same way again. For most R51 Pathfinders, the washer is a 14 mm inner-diameter crush ring. Aluminium is the usual OE choice, though copper versions also work well. Tighten the drain plug to the factory torque for your engine variant (typically around 25–30 N·m), don’t just “do it up till it feels right”.

• Always clean the sump’s sealing face and the plug before refitting.
• Use one washer only—never stack them—and bin any crushed washer.
• If the plug’s flange is grooved or the threads are tired, replace the plug along with the washer.
• Avoid thread tape or sealants, the crush washer does the sealing.

Referencing: Nissan Pathfinder R51 (2010) Factory Service Manual, Engine Mechanical—Lubrication System: “Install drain plug with new washer”, Nissan FAST EPC listing for R51 (2010) shows drain plug gasket 14 mm (e.g., 11026-01M02 / 11026-JA00A). These technical sources confirm the washer is fitted and intended to be renewed during routine servicing.

Popular questions

What size sump plug washer does a 2010 Nissan Pathfinder use?
Most 2010 R51 Pathfinders use a 14 mm inner-diameter crush washer. Genuine Nissan listings commonly show 11026-01M02 or 11026-JA00A. If in doubt, check the VIN against a parts catalogue to confirm your engine variant’s spec.

Should the sump plug washer be replaced at every service?
Yes. The factory manual calls for a new washer each oil change. They’re designed to crush once for a perfect seal, reusing them can lead to small leaks or overtightening.

Aluminium or copper—what’s better for a Pathfinder?
Aluminium is the usual OE choice and works a treat. Copper also seals well. Either is fine if it’s the correct 14 mm size and quality. Regardless of material, replace it every time the oil is changed.