Parts for your 2019 Mitsubishi Eclipse cross-Sump plug washers

2019 Mitsubishi Eclipse Cross — sump plug washers

Based on Mitsubishi’s own service information and genuine parts cataloguing, the 2019 Mitsubishi Eclipse Cross does use a sump plug washer (also called an oil drain plug gasket). The Eclipse Cross service manual for the 4B40 1.5L turbo engine specifies refitting the drain plug with a new gasket at each engine oil change and gives a drain plug tightening torque in the high-30s N·m range (commonly 39 N·m). Mitsubishi Genuine Parts listings also show a dedicated drain plug gasket for late-model vehicles, offered as single pieces and in multi-packs (e.g., Mitsubishi “Engine Oil Drain Plug Gasket” packs such as MZ690065, with applicability that includes Eclipse Cross models). These technical sources confirm the washer is fitted and required for proper sealing.

The sump plug washer on the 2019 Mitsubishi Eclipse Cross is a simple crush-style gasket that deforms slightly when the plug is torqued up. That crush action gives a reliable seal between the plug head and the alloy steel sump, keeping engine oil where it belongs and preventing annoying drips on the driveway. On this model, it’s a single-use item: once compressed, it shouldn’t be reused because it won’t spring back or seal as well the second time.

As part of routine servicing, it’s smart practice to replace the washer at every oil change. Mitsubishi service literature instructs using a new gasket whenever the drain plug is removed, then tightening the plug to the specified torque, typically around 39 N·m for the Eclipse Cross 1.5T engine. That spec matters—too loose risks a weep, too tight can crush the washer unevenly or damage the sump threads. A quality aluminium or copper washer matched to the plug size (commonly M14 on this vehicle) keeps the job tidy and leak-free.

Drivers who notice a faint oil mist around the plug, a fresh drop on the undertray, or a damp spot developing a day or two after a service are often looking at a washer that’s been reused or under-torqued. Swapping in a fresh washer and tightening correctly almost always sorts it.

• Replace the washer at every oil change—don’t reuse.
• Clean the plug face and sump seat before refitting.
• Tighten to the factory torque (about 39 N·m for the 4B40 engine).
• After the first drive, have a quick look for any trace of seepage.

For owners in Australia and New Zealand, grabbing a small pack of genuine-spec washers makes sense. They’re inexpensive, save mucking about mid-service, and help protect the sump threads by avoiding over-tightening to chase a seal. It’s one of those tiny parts that quietly prevents big headaches.

Popular questions

What size sump plug washer does a 2019 Eclipse Cross use?
The Eclipse Cross typically uses an M14 crush washer matched to the drain plug. Genuine Mitsubishi washer packs list fitment for late-model vehicles, including the Eclipse Cross. Using the correct diameter and material (aluminium or copper) ensures the washer compresses properly and seals first go.

How often should the sump plug washer be replaced?
Every oil change. Mitsubishi service information calls for a new drain plug gasket whenever the plug is removed. It’s a single-use part—reusing it can lead to drips or the temptation to over-tighten the plug, which isn’t great for the sump threads.

What’s the correct torque for the drain plug on the 2019 Eclipse Cross?
Service data for the 4B40 engine specifies a drain plug torque in the high-30s N·m range, commonly 39 N·m. Sticking to that spec lets the crush washer do its job without stressing the plug or sump. If a torque wrench isn’t handy, it’s better to replace the washer and snug correctly than to lean on the spanner to stop a weep.