A/C Belt - 5PK863 - 1999-2002 E46 E39 X5 Z3 - 11281437450

The A/C drive belt runs air conditioner compressor and is driven from the crankshaft pulley on the M52TU and M54 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 A/C compressor pulley and tensioner before ordering your belt. Or plan to order these parts at the same time. These 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.

Fitment note: 5PK863 fits models from 1999-2002. From 2003 onward a narrower 4PK863 belt was used.