Parts for your 2009 Nissan Pathfinder-Sump plug washers

2009 Nissan Pathfinder sump-plug-washers — what they do and when to replace

Yes, the 2009 Nissan Pathfinder uses a sump-plug-washer. Technical references including the Nissan R51 Pathfinder Service Manual (Engine Mechanical section) and the Nissan Electronic Parts Catalogue (FAST/EPC) specify an aluminium crush-type drain plug gasket for both common 2009 engines (VQ40DE petrol and YD25DDTi diesel). Genuine Nissan part numbers commonly referenced are 11026-JA00A (superceding 11026-01M02), and the manual advises replacing the washer whenever the engine oil is changed.

On this Pathfinder, the sump-plug-washer is a small but crucial seal that sits under the oil drain plug. When the plug is tightened to spec, the soft aluminium washer deforms slightly to create a reliable, leak-free seal between the plug and the sump. Without it, or if it’s flattened from previous use, oil can creep past the threads and leave telltale drips on the driveway, not to mention the risk of gradual oil loss over time.

During routine services, the washer should be treated as a consumable, just like the oil filter. It’s inexpensive, keeps the sump face tidy, and helps the plug torque up consistently. For most 2009 Pathfinders, typical drain plug torque is around 34 N·m (25 ft‑lb), but the exact figure should be confirmed against the engine-specific service data. Over-tightening isn’t a shortcut — it can distort the washer unevenly or damage the sump threads. Under-tightening can leave you with a weep. Right spec, fresh washer, job done.

Drivers in Australia and New Zealand who tour, tow, or see a bit of corrugation and heat will appreciate the reliability a new crush washer brings. If there’s any sign of oil mist around the plug, a drip forming after a run, or the old washer sticking to the sump face, it’s time to replace it. Keeping a small pack of the correct 14 mm Nissan washers in the service kit makes life easier at oil change time.

• Replace the sump-plug-washer at every oil change.
• Inspect the sump face for an old washer stuck on — remove before refitting.
• Clean threads, hand-start the plug, fit a new washer, and torque to the spec for your engine.
• After the first drive, have a quick look for any seepage around the plug.

What size and part number sump plug washer does a 2009 Nissan Pathfinder use?

For most R51 Pathfinders in 2009 (VQ40DE petrol and YD25DDTi diesel), it’s a 14 mm aluminium crush washer. Genuine Nissan part numbers commonly cited are 11026-JA00A (which supersedes 11026-01M02). Always match by VIN if unsure, especially on late-2009 builds or market-specific variants.

Can a sump-plug-washer be reused on a Pathfinder?

It’s not recommended. A crush washer is designed to deform once for a proper seal. Reusing can lead to weeps or inconsistent torque. In a pinch, it might seal, but best practice is to fit a new washer at every oil change for peace of mind.

How tight should the drain plug be with a new washer?

Typically around 34 N·m (25 ft‑lb) for the 2009 Pathfinder, but confirm against your engine’s service manual spec. Use a torque wrench, avoid over-tightening, and check for any signs of seepage after the first heat cycle.