OEM Belt Tensioner With Pulley & Drive Belt Kit – INA/Contitech For BMW 3.0L XDrive

If your BMW's serpentine belt is squealing or the tensioner's rattling, this kit from INA and Contitech is the fix.

It includes the belt tensioner assembly with pulley, plus the drive belt—both pieces you need to do the job right.

It's for BMW 3.0L engines with xDrive, fitting models like the 535i, 640i, 740Li, X5, and X6 with the xDrive35i setup.

These are OEM original parts—INA makes tensioners for BMW, Contitech makes belts—so you're getting factory-quality stuff.

Part numbers cross to BMW genuine 043310478.

Tensioner's got an aluminum body with rubber damping, belt's the right length and spec.

2-year warranty included.

If you're doing cooling system work or just preventive maintenance, replace the tensioner and belt together and forget about it for another 60k miles.