Across the 2021 X3 lineup, oil capacity depends on the engine: the two-liter turbocharged four, used in the xDrive30i, takes roughly 5.3 quarts (about 5.0 liters) of oil with a filter; the six-cylinder M40i uses roughly 7.0 quarts (about 6.6 liters) with a filter. Exact capacity can vary slightly by market and oil filter size, so always verify in the owner's manual or on the service information portal.
Engine options and oil capacity
Here are the typical oil capacities for the two main U.S. engines in the 2021 X3, including the filter:
- 2.0L turbocharged inline-4 (B48) — about 5.3 quarts (5.0 liters) of engine oil, including the filter.
- 3.0L turbocharged inline-6 (B58) — about 7.0 quarts (6.6 liters) of engine oil, including the filter.
Capacities are approximate; always confirm the exact figure for your vehicle variant in the owner's manual. After changing the oil, reset the service light as directed by BMW guidelines.
Oil type and service notes
For best results, use a synthetic motor oil that meets BMW Longlife-04 specifications. The common viscosity for modern X3 engines is 0W-20, with 0W-30 acceptable in certain climates per the owner's manual. Always use a new oil filter and the proper drain-plug gasket, and follow BMW's recommended service intervals.
Summary
The 2021 BMW X3 typically requires about 5.3 quarts (5.0 liters) of oil for the 2.0L B48 engine and about 7.0 quarts (6.6 liters) for the 3.0L B58 engine. Always verify exact capacity in the manual for your specific model and market, and ensure you use the correct oil specification and filter during changes.