Is your BMW X3's engine running hotter than it should? This replacement cooling fan could be the fix. It's brand new, designed to fit all BMW X3 models from 2004 to 2010, regardless of engine size. It's a beefy 600-watt unit with a 4-pin electrical plug, just like the original. The part number matches 17113442089 and BM3115135. Sold by YourRadiator and comes with a 1-year manufacturer warranty, so you can buy with some peace of mind. A failing cooling fan can lead to overheating, especially in traffic or hot weather. Replacing it is a bit of a job, but doable for a competent DIYer with some tools. This fan helps pull air through the radiator and condenser, keeping your engine and A/C system cool. Make sure your old one is actually faulty before buying, but if you hear strange noises, lack of airflow, or get overheating warnings, this is likely what you need. Get your BMW's cooling system back in top shape and avoid bigger, more expensive problems down the road.