Keep your motor’s lungs fed with clean, energy-rich oxygen from the “the world’s best air filter”—K&N Air Filters. Constructed from pleated sheets of oiled cotton gauze, these air filters strip away grime without blocking airflow. Fully reusable. Million Mile Limited Warranty.
Say goodbye to the days of re-oiling your reusable performance filter—innovative aFe Pro-Dry S Air Filters boast a 100% oil-free cotton gauze construction for wicked airflow. Easy to clean and reuse. The Pro-Dry S Air Filter is backed by a Lifetime Warranty.
Put to rest the ghosts of paper air filters past by exorcizing your air system with a Spectre Air Filter. Masterfully constructed from pleated cotton gauze, these performance air filters trap dirt while still allowing energy-rich air to blast through. Reusable. Lifetime Warranty.
Get maximum filtration with the Airaid SynthaMax Air Filter. Featuring 5 layers of non-oiled, 100% synthetic fiber, this reusable air filter directly replaces your factory paper filter with no modifications. Washable in household detergent and reusable for life. Lifetime Warranty.
When you equip your engine bay with an aFe Air Filter, you’ll never need another performance air filter in your ride’s life. aFe expertly crafts your automotive air filter from high-quality cotton gauze to trap grime without blocking airflow. Cleanable and reusable. Lifetime Warranty.
Drop in optimal engine filtration and performance with the Airaid SynthaFlow Air Filter. Replacing flimsy factory paper filters, this high-performance filter combines multiple oiled cotton gauze and synthetic fiber layers to deliver ultimate airflow and protection. Lifetime Warranty.
Not sure which 2003 BMW 5-Series Air Filters - Custom Fit is right for you? We have over 14143 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"Every car I have runs with K&N filters for a reason. I'm very happy with the performance I receive." —Curtis G from Nipomo, CA bought a K&N Air Filters for a 2003 BMW 5-Series, E39 chassis, 525i, 2.5L 6-cyl. engine.
"I just replaced air filters in both of my vehicles, with K&N's. 88 RX7 conv. and 03 BMW 5 series wagon. Happy with performance increase due to better air flow. I was told by my mechanic to use the oil sparingly as too much can damage mass air flow sensor. That's my concern for my BMW." —James D from Bridgeville, PA bought a K&N Air Filters for a 2003 BMW 5-Series, E39 chassis, 525i, 2.5L 6-cyl. engine.