BMW E39 5-Series Fuel Filter Replacement | 1997-2003 525i Give the fuel filter a twist to break it loose from the hoses and pull out the hoses. Installation is the reverse of the removal procedures. Fit the fuel filter in the fuel hoses and tighten the clamps Fit the mounting bracket around the fuel filter and tighten down to the body. BMW 525i Fuel Filter - Best Fuel Filter Parts for BMW 525i Order BMW 525i Fuel Filter online today. Free Same Day Store Pickup. Check out free battery charging and engine diagnostic testing while you are in store.