BMW 128i Air Filters

Your BMW 128i features two air filters in place. One is for your engine, while the other is for the vehicle's HVAC system. Much like your oil filter, they serve to prevent airborne contaminants from getting into critical systems and causing problems.

You'll find your engine air filter near the air intake, where it captures pollutants and debris long before they can get into your motor and begin to choke off the oxygen your engine needs for optimal combustion. The cabin air filter is located under your vehicle's hood. It prevents allergens and other irritants from getting into the air ducts and passing through the vents into your passenger space.

Unfortunately, even top-quality air filters degrade with time. It's far more likely for them to get too blocked with particulates, though. When that happens, the quality of the air you and your engine get fed suffers. You'll want to replace yours before that happens.

How to Spot Failing Air Filters

Signs of problems include:

• Reduced horsepower
• Misfiring engine
• Delayed response from the throttle
• Darker exhaust emissions
• Unusual engine sounds
• Inconsistent cabin temperature
• Worsening fuel efficiency
• The cabin space smells musty

Genuine OEM Air Filters Perform Best

Check your air filters regularly to note their condition. If you can't see light through the fibers, then you need to replace yours. BMW makes the best air filters for your model, since they make the only ones guaranteed to be compatible. Find yours right here in our online auto parts inventory. Buy now and we'll ship your order straight to your door!