About this part
What it does. K And N Replacement Air Filter K&N 400-33-3155 keeps dust and debris out of the intake so the engine draws clean air.
Symptoms that point to this part
- Reduced fuel economy
- Sluggish acceleration
- Visibly dirty or clogged filter element
Service note. Typically inspected at every service and replaced roughly annually.
Fitment. Catalogued as fitting 2020–2025 BMW M850i Xdrive, 2022–2024 BMW M850i Xdrive Gran Coupe, 2021–2022 BMW 750i Xdrive, 2021 BMW M550i Xdrive. Engine, sub-model and trim can narrow fitment further, so check those attributes on the listing before ordering.