Main Drive Belt, OEM - F44, F48, U11, F39, B46/B48 (6PK1175)

This part is listed by BMW as BMW part number 11287952902 (11 28 7 952 902) and is described as the main / serpentine belt for 3 cylinder and 4 cylinder engines found in F44 228i/M235i Gran Coupe, F48 X1, U11 X1, and F39 X2.

The main drive belt runs the water pump, power steering pump, and alternator on the B38, B46/B48 engines. It's very important not to neglect your drive belts as a failure will leave you stranded. They're easy to inspect during normal maintenance such as an oil change or refilling your washer tank. If there are cracks running across the ribs, sections missing, the edges are frayed, or the threads are visible on the belt surface, the belt should be replaced immediately.

If you can, inspect and test the pulleys before ordering your belt(s) - tensioner, idler, water pump, and power steering. Also test the belt tensioner at the same time. Or plan to order new pulleys and tensioner with your belt(s). These pulleys are made of plastic and shatter with age, causing potentially expansive/expensive damage to your engine, radiator, etc. They usually last longer than the belt but now is the best time to replace them. Since they are bolted on, not pressed, they are easy to replace.

This part number is compatible, or replaces, BMW part numbers 11287952902, 11285B32CE4, 11288638716, 6PK1175, 6PK1173.

This is an OEM serpentine belt manufactured by the original supplier to BMW for this part, as well as many other engine components. As the OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.