A/C Drive Belt, PK4X840, Continental - E65 745i, E53 X5 4.4i/4.8is N62
OEM replacement belt for A/C system
The A/C drive belt runs air conditioner compressor and is driven from the crankshaft pulley on the N62 V8 engine. 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 roller 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.
This is an OEM serpentine belt manufactured by Continental - the original supplier to BMW for engine belts. 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.
E65 / E66 (02-08) > 745Li
E65 / E66 (02-08) > 745i
E53 X5 (00-06) > X5 4.4i N62
E53 X5 (00-06) > X5 4.8is N62