Important fitment Information: This belt fits R1100 S and R1150 models after production date 07/2003. If your bike was manufactured around this time, you may want to have a look at your original belt before ordering. If you can still see the markings and verify that they are 4PK592, then this will be the correct belt.
Equivalent to BMW part number 12 31 7 681 841 (12317681841). This belt is the replacement for 4PK592