Most BMW 328i models have the cabin air filter located behind the glove box on the passenger side. Access usually involves lowering or removing the glove box and opening a small access panel to reach the filter. The exact steps vary by generation.
In practice, the 3-series 328i across different generations keeps the filter in the same general area, but the method to reach and replace it can differ slightly depending on the year and model designation. The guide below covers the main generations you’re likely to encounter in US-market 328i cars.
Location by generation
Before starting, note that the filter orientation matters; arrows on the filter indicate the direction of airflow. Have a replacement filter ready that matches your model’s size and design. The following outlines summarize where to look and how to access the filter across common 3-series generations associated with the 328i badge.
- E46 (approximately 1998–2005, including some 328i models): The cabin air filter sits behind the passenger-side knee area/glove-box region. Open the glove box, release the side hinges to drop it, and remove the rear access panel to reach the filter housing. Replace the filter with the arrows pointing inward toward the cabin, then reassemble.
- E90/E91/E92/E93 (approximately 2005–2013, including 328i): Located behind the glove box on the passenger side. Squeeze the sides of the glove box to release the dampers, lower the box, and remove the filter cover on the right side of the cavity. Swap in a new filter and resecure the cover and glove box.
- F30/F31 (approximately 2012–2019, including 328i variants): The filter resides behind the glove box. Remove the glove box damper, lower the box, and pull out the rectangular filter housing cover. Replace the filter and reinstall the housing and glove box.
- G20 (approximately 2019–present; some markets badge the model as 330i): The cabin filter is still behind the glove box on the passenger side. Access typically involves lowering or removing the glove box to expose the filter housing; replace the filter and reassemble.
In all cases, ensure the engine is off and the vehicle is in a safe position before starting. Handle clips and panels gently to avoid damage, and check that the new filter seats firmly in its frame with the correct orientation.
Bottom line: Across the major BMW 3-series generations that use the 328i badge, the cabin air filter is generally located behind the glove box on the passenger side, with access achieved by lowering or removing the glove box and an accompanying panel or housing.
Practical tips for a successful replacement
Keep track of screws or clips removed during disassembly, verify the filter orientation before installation, and dispose of the old filter properly. If you’re unsure of your exact model year fit, consult the owner’s manual or a trusted parts diagram for your VIN, or watch a model-specific replacement video for visual guidance.
Summary: In most BMW 328i models, the cabin air filter is located behind the glove box on the passenger side. Access it by lowering or removing the glove box and opening the filter housing; replace with a new filter oriented as indicated by the airflow arrows. Replacement intervals typically range from 15,000 to 30,000 miles, depending on driving conditions.