After replacing the microfilter during a previous service, the customer notices that the ventilation...
BMW technical service bulletin SIB 64 03 21 for 2018-2021 BMW X3, 2019-2021 BMW 330I and 2019-2021 BMW X4 and others.
- Bulletin number
- SIB 64 03 21
- Component
- Equipment
- Summary
- After replacing the microfilter during a previous service, the customer notices that the ventilation system airflow rate is noticeably less. This leads to perceived lower cooling power. The customer may also notice that external odors enter the vehicle.
Vehicles covered
VIN decoder
See the problems and recalls for an exact car
Buying a used BMW X3?
Check the exact car before you pay: accidents, salvage or flood titles, odometer readings and previous owners.
Check its history