Most BMWs have two air filters: one engine air filter and one cabin air filter.
Beyond these two core components, the total filtration setup can vary by model and market. Some engines use emissions-related filters in the exhaust, such as gasoline particulate filters (GPF) or diesel particulate filters (DPF), which are not air filters but are part of the broader filtration system attached to the vehicle’s powertrain. This article outlines the standard two-filter layout and notable variations.
Two primary air filters in most BMWs
Here are the two main filters that BMW cars typically have in their air handling system:
- Engine air filter (intake air filter)
- Cabin air filter (often called the pollen or HVAC filter; may include activated carbon to reduce odors and improve air quality)
In practice, the standard BMW setup centers on these two filters; some models or markets may differ due to engine type or emissions requirements.
Regional and model variations
Some BMW models and engine families incorporate additional filtration elements related to emissions controls or specific HVAC configurations. While not air filters themselves, these components can affect overall filtration in the vehicle:
Gasoline engines and gasoline particulate filters (GPF)
Many modern BMW petrol engines include a gasoline particulate filter (GPF) in the exhaust to trap soot before exhaust gases are released. This is part of emissions control rather than an intake or cabin air filter and its presence depends on the engine and regional regulations.
Diesel engines and diesel particulate filters (DPF)
Diesel BMWs typically incorporate a diesel particulate filter (DPF) in the exhaust system to meet emissions standards. Like the GPF, the DPF is an exhaust filter and not an air intake or cabin filter, but it is part of the vehicle’s overall filtration strategy in markets where required.
Summary
For everyday ownership, BMW vehicles rely on two primary air filters: the engine air filter and the cabin air filter. Some models may have additional filtration elements tied to emissions systems (GPF or DPF) in the exhaust, which are not counted as air filters but play a role in the car’s overall cleanliness of exhaust and air handling. Always consult the owner's manual or a dealer for model-specific details and replacement intervals.