One of the easiest jobs you can do on your BMW E46 3-Series is to replace the engine air filter. There are a whole host of benefits to replacing the engine air filter such as improved fuel efficiency, reduced emissions, and prolonged engine life.

A very simple maintenance item you can do on your 2nd generation Acura CL (including Type-S models) is to replace the engine air filter. This applies to model years 2000-2003. Acura also calls the engine air filter the air cleaner element and recommends replacing it every 30,000 miles or 24 months, whichever comes first. Changing the engine air filter is incredibly easy on this car and takes 5 minutes to do.