Air filters are a very important part of the intake system. It is needed in the “breathing” process of the engine as it needs precise ratio of air and fuel. If there is insufficient supply of air due to dirty and clogged air filter, the “intake” process will fall short and will cause great damage to the engine. A clogged BMW 528I air filter prevents the air needed by the combustion system to pass through. As such, the combustion system will not work as designed and the performance of the vehicle will stall to its lowest. When your stock BMW air filter is damaged and worn out, better secure premium quality Mann air filters. Mann BMW air filter functions in separating the contaminants from the bulk of air that is sucked into your engine. These contaminants could build up into the passages and tubing and disturb engine mechanisms. The quality of air that runs throughout your engine determines the efficiency of fuel consumption. With Mann BMW 528I air filters, you keep your engine clean and far from being damaged while maintaining good working conditions. Your 1998 BMW 528I Mann air filter will significantly improve your air-fuel ratio while filtering out the particles and dust carried by the exhaust gases. Having clean air in your engine saves you fuel and energy consumption in maintaining desirable levels of engine temperature and emission that improves fuel efficiency and cuts cost on maintenance. Grab your Mann air filter here in our online catalog. You can find premium quality air filters that will fit best with your car.