Parts for your 1993 Nissan Primera-Sump plug washers

1993 Nissan Primera sump plug washers — what they do and when to replace them

Technical sources confirm the 1993 Nissan Primera does use a sump plug washer (drain plug gasket). The Nissan Primera P10 Factory Service Manual (Maintenance section) specifies fitting a new drain plug gasket at each oil change, and the Nissan FAST electronic parts catalogue lists a “gasket—drain plug” for P10 models with GA16 and SR20 engines (commonly Nissan part 11026-01M02, superseded in some listings by 11026-4N20A). The Haynes Primera 1990–1999 manual also advises renewing the sealing washer whenever the plug is removed.

On a 1993 Nissan Primera, the sump plug washer is a simple but crucial little ring that seals the oil drain plug to the sump. Its job is to prevent weeping or drips after an oil change, keeping the driveway clean and the engine’s oil where it should be. Nissan uses a crush-style washer that deforms slightly when tightened, creating a reliable seal without needing excessive torque on the plug.

Because it’s a crush washer, it’s designed for one-time use. Each time the plug is removed for an oil change, a fresh washer should go on. That’s why most pro workshops keep a handful of the correct Nissan-spec washers on hand. Skipping it can lead to slow leaks, oil mist under the car, and the temptation to overtighten the plug, which risks damaging the sump threads — a pricey headache no one needs.

As part of routine servicing on a 1993 Primera, they’ll typically:

• Remove the plug with the engine warm, drain the oil fully, and inspect the plug threads.
• Fit a new OEM-equivalent crush washer to the cleaned plug.
• Refit and tighten the plug to the factory torque spec from the FSM (don’t overdo it).
• Refill with the correct grade oil and check for any seepage after a short run.

Owners who do their own servicing should keep a small pack of genuine or quality aftermarket washers that match the Primera’s drain plug size and seat type. Aluminium or copper crush washers are both common, stick with what Nissan specifies for the best result. If the sump face has old gasket residue or a nick, clean it carefully and replace any damaged components before refitting. A new filter, fresh oil, and a new sump plug washer every service — it’s the tidy, Aussie/Kiwi way to keep an old Primera running sweet and leak-free for many more kilometres.

Popular questions about 1993 Nissan Primera sump plug washers

What size sump plug washer does a 1993 Primera use?
Nissan specifies a drain plug gasket for the P10 Primera that matches its factory drain plug. In practice, most parts catalogues list a 14 mm crush washer for these cars. Using the correct Nissan-listed washer ensures the seat and thickness are right for a proper seal.

How often should the sump plug washer be replaced?
Every oil change. The washer is a crush type, so once it’s deformed, it won’t seal as well next time. Replacing it each service helps avoid leaks and saves the sump threads from overtightening.

Can the sump plug washer be reused if it looks OK?
It’s not recommended. Even if it looks fine, a used crush washer may not reseal reliably. A new washer is inexpensive insurance against drips and do-overs.