and high quality Tension Wheel avoids belt slippage, compensate for belt wear and elongation after aging. The noise is small, and it can prevent slipping. Advantages - According to the different degree of tightness of the belt, the tension can be automatically adjusted, to make the transmission system stable, safe and reliable. Use high-quality materials and longer lasting. Easy to install, but professional installation is highly recommended. Durable, long lasting. Suitable to replace your broken one. Instruction is not included in the package. Reference Equipment Part Number: 11281433571 Item Type: Belt Tensioner Idler Pulley Condition : 100% Manufacturer Part Number:NO.: 11281433571 Superseded by: 11287512758(09/01/2002 - ), nonexchangeable retrospectively Part 11281433571 was found on the following vehicles: for 3 Series E46 (04/1997 - 08/2006) for 5 Series E39 (02/1995 - 12/2003) for 7 Series E38 (03/1995 - 07/2001) for X5 E53 (08/1999 - 09/2006) for Z3 E36 (09/1999 - 06/2002) for Z4 E85 (11/2004 - 08/2008) for Z4 E86 (10/2005 - 08/2008) Colour: black Material: plastic Package Contents: 3 x belt tensioner Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.