Affiliate link disclosure – The BMW Repair Guide uses affiliate links in their site. For more information on affiliate links, please click here.
The following article gives detailed instructions on replacing the cabin air filter (microfilter) in a BMW F30. Even though we have used a 2014 BMW 320i to perform this installation, this article can be applied to any 2012-2019 3 or 4 series vehicle with minor modifications.
See all vehicles this article applies to
F30 3 Series 318d
F30 3 Series Hybrid 3
F30 3 Series 335iX
F30 3 Series 335i
F30 3 Series 335dX
F30 3 Series 330d
F30 3 Series 330dX
F30 3 Series 328i
F30 3 Series 328dX
F30 3 Series 328d
F30 3 Series 328iX
F30 3 Series 320iX
F30 3 Series 325d
F30 3 Series 320i
F30 3 Series 320i ed
F30 3 Series 320dX
F30 3 Series 320d ed
F30 3 Series 320d
F30 3 Series 318dX
F30 3 Series 316i
F30 3 Series 316d
A BMW F3x cabin filter (microfilter) replacement will help restore fresh clean air to the interior of your 3 or 4 series vehicle.
One of the most overcharged dealership maintenance items on a BMW is replacing the cabin air filter, also known as the micro-filter. They are notoriously easy to replace and are very inexpensive to purchase.
The BMW F30 cabin air filter does exactly as its name implies; it filters the fresh air being drawn into the interior cabin of your 3 or 4 series car through the heating, ventilation and air-conditioning (HVAC) system. It filters out dust, pollen and other air-borne contaminates as well as noxious odors. It is an extremely important component of your vehicle's HVAC system and plays an important role in providing a fresh, comfortable, allergen free environment inside your BMW.
The BMW Repair Guide recommends replacing your BMW F30 cabin filter once a year. If you drive in an excessively contaminated environment (like a smog filled city or around heavy road construction) you may want to change it more often.
View the detailed parts diagram for this repair.
Includes detailed part diagrams, part numbers and links to purchase all of the required components needed to complete this repair.
Section 1 - Removing and Installing the BMW F30 cabin filterRemoving and installing the cabin filter in your 3 or 4 series vehicle is very straightforward. The cabin filter is located inside the car, underneath the dashboard behind the glove box. We recommend putting the passenger seat back as far as it will go to give yourself enough room to remove and install the cabin filter.
- Locate the BMW F30 cabin filter. It is located on the passenger side of the vehicle underneath the glove box.
- Using a 10mm socket wrench, remove the two mounting nuts securing the lower trim panel to the bottom of the dashboard. Grasp the trim panel and pull it loose.
- Disconnect the power accessory outlet and the footwell light. Remove the trim panel from the vehicle.
- Locate the black cabin filter housing under the dashboard. It has a cover on it that is held in place with two torx screws.
- Using a T15 torx bit or torx key, remove the two screws securing the cabin filter cover. Remove the cover from the housing. You can now see the cabin filter.
- Grasp the cabin air filter and pull it out of the housing.
- Install a new cabin filter and reassemble the vehicle following the above instructions in reverse. Pay particular attention to the front of the trim panel when reinstalling...the plastic tabs on the trim panel must line up with the slots in the dashboard. Failure to line them up correctly could cause the tabs to break off.
BMW F30 Cabin Air Filter Replacement Finished