Parts for your 2019 Bmw X3-Sump plug washers

2019 BMW X3 sump plug washers — what they do and when to replace them

Yes, a sump plug washer is fitted to the 2019 BMW X3. Across the G01 range — including the four‑cylinder B46/B48 petrols, the six‑cylinder B58 (M40i), and the B47 diesels — BMW specifies an oil drain plug that seals with a single‑use aluminium crush washer. This is shown in the BMW ETK (Electronic Parts Catalogue) for G01 X3 models and mirrored in dealer repair instructions within BMW TIS/ISTA, which call out “screw plug with sealing ring” and require the ring to be renewed at every oil change. Parts listings typically identify aluminium sealing rings sized A12x17 (common on M12 plugs) or A14x20 (common on M14 plugs), depending on engine.

The washer’s job is simple but critical. When the drain plug is torqued, the soft aluminium ring deforms to fill microscopic gaps between the plug flange and the sump face, creating a reliable, leak‑free seal. Reusing a crushed washer risks weeping, stripped threads from over‑tightening, or a stubborn leak that coats the undertray and driveway — not ideal on Aussie or Kiwi roads.

As part of routine servicing, it’s smart to keep a couple of genuine‑spec washers on hand and replace the washer every time the engine oil is changed. Many owners in Australia and New Zealand choose oil service intervals of 10,000–15,000 km or annually (even if the BMW Condition Based Service counter suggests longer). Each service should include: removing the plug, discarding the old washer, cleaning the mating face, fitting a fresh washer, and tightening the plug to the correct torque stated in BMW ISTA for the exact engine code. Typical figures are around 25 Nm for M12 plugs and 30–40 Nm for M14, but the workshop data for the specific VIN is the authority.

Handy tips: don’t stack washers, never reuse the old ring, inspect the sump face for nicks, and check for seepage after the first warm run. Parts catalogues for the G01 X3 confirm the washer is a separate item, not a reusable rubber O‑ring plug — so it’s a small, cheap part that does a big sealing job when replaced as intended.

• Technical sources referenced: BMW ETK (G01 X3 oil sump section), BMW TIS/ISTA engine oil change instructions, and cross‑referenced parts listings commonly shown in RealOEM‑style catalogues.

Popular questions about 2019 BMW X3 sump plug washers

What size sump plug washer does a 2019 BMW X3 use?
It depends on the engine. Most B46/B48 four‑cylinder models use an aluminium A12x17 washer on an M12 drain plug, while many B58 six‑cylinder models use an A14x20 on an M14 plug. The sure way is to check the VIN in the BMW ETK or compare with the removed plug.

Do they need replacing at every oil change?
Yes. BMW TIS/ISTA specifies the sealing ring as single‑use. Swapping it every service helps maintain the correct clamp load at the specified torque and prevents annoying drips or undertray mess.

What torque should the drain plug be tightened to?
Use the value in BMW ISTA for your exact engine and sump. As a guide, M12 plugs are commonly around 25 Nm and M14 around 30–40 Nm. Always fit a new washer and use a torque wrench.