Parts for your 2019 Nissan Serena-Sump plug washers

2019 Nissan Serena sump plug washer — what’s the go?

It is relevant and used. Technical references such as the Nissan Serena C27 (2016–2020) service manual (Engine Mechanical section) specify replacing the drain plug gasket whenever the sump plug is removed, and the Nissan FAST electronic parts catalogue lists a 14 mm sump drain plug gasket for the C27 Serena’s MR20DD engine (commonly referenced as Nissan part 11026-01M02, depending on market). Always confirm by VIN, but for the 2019 Serena a crush-type sump plug washer is part of normal servicing.

On the 2019 Nissan Serena, the sump plug washer is a small but critical bit of kit. It’s a soft, crushable gasket that sits between the sump (oil pan) and the drain plug. When the plug is tightened, the aluminium washer deforms slightly to create a fluid-tight seal. That seal keeps engine oil where it belongs, helps maintain correct oil pressure, and stops weeping around the plug that can otherwise make a mess on the driveway and attract dirt onto the sump.

This washer is designed to be replaced, not reused. Each time the drain plug is removed for an oil change, the old washer has already been compressed. Reusing it risks seepage, overtightening the plug to chase a seal, or worse, damaging the sump threads. That’s why Nissan’s service literature calls for a new washer at each oil change. They’re inexpensive, and swapping one in is quick insurance against leaks.

For owners and workshops servicing a 2019 Serena, the best practice is simple: have the correct 14 mm crush washer on hand, clean the mating surfaces, and refit the plug using a torque wrench to the spec in the Serena service manual. Avoid thread sealants or tape, the washer is the seal. If a magnetic or quick-drain plug has been fitted aftermarket, still ensure it uses the correct-size washer and that the sealing face is clean and flat.

Signs the washer needs attention include fresh oil spots under the front of the vehicle, an oily film tracking from the plug, or a plug that seems to “bottom out” too soon when tightening. If any of these show up after a service, replace the washer and re-torque the plug. And for peace of mind on longer Kiwi and Aussie road trips, tossing a couple of spare genuine-spec washers in the glovebox is a tidy move.

• Replace the washer at every oil change.
• Use the correct-size crush washer for the Serena’s sump plug.
• Tighten to the factory torque spec, don’t overtighten.

Popular questions about 2019 Nissan Serena sump plug washers

What size washer does the 2019 Serena use?
For the C27 Serena with the MR20DD engine, a 14 mm crush washer is typically specified in Nissan parts catalogues. Because markets vary, it’s smart to confirm by VIN or match the old washer’s inner diameter and profile before purchase.

How often should the sump plug washer be replaced?
Every oil change. The washer is a single-use crush gasket. Replacing it each service helps prevent leaks and avoids the temptation to overtighten the plug to achieve a seal.

Can the washer be reused if it looks fine?
Best not. Even if it looks okay, it’s already compressed and may not seal reliably again. Given the low cost and the potential hassle of an oil leak, a fresh washer each time is the better move.