Main Drive Belt (6PK1196), BMW - G20, G22/G26, G30, G01, G02, G05, G06, G07 (B58C, B58D, 48V)

This part is listed by BMW as BMW part number 11289844643 (11 28 9 844 643) and is described as the main drive belt runs the water pump and alternator on B58C and B58D engines with the 48-volt Mild Hybrid system (MHT).

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 is a Genuine BMW B58 serpentine belt with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore.