Shop 2013 BMW M6 Accessory Drive Belt Tensioner Assembly. 4.0 & 4.4 LITER, alternator belt, adjust. 540I Alt, Alternator, LITER - OEM BMW Part # 11281742858 (11-28-1-742-858)

Pulley. Tensioner. Accessory Drive Belt Assembly. Adjusting with Lever.
Assembled device that applies load to the Drive Belt. For Serpentine Belt.

Accessory Drive Belt Tensioner Assembly

Fits 540i, 740i, 740iL

4.0 & 4.4 LITER, alternator belt, adjust. 540I 1998-03, adjuster, alt & P/S belt. 740i; Water Pump & Alt. 740iL; Water Pump & Alt.
Drive Belt Tensioner - Repair or Replace
A squeaking or squealing noise from your engine bay is usually due to a loose drive belt. Consider replacing the drive belt tensioner on your .