Mechanical Belt Tensioner for AC - Genuine BMW - M54/S54 Engines

This is the mechanical A/C belt tensioner used on the 2001-2006 E46 M3, MZ3 S54, and Z4M. The tensioner keeps the A/C belt at the proper tension for driving the A/C compressor. A failing tensioner will allow the belt to loosen or slip resulting in diminished performance.

This part is listed by BMW as BMW part number 11281433571 (11-28-1-433-571) and is described as Genuine BMW Tensioner Assembly for AC Belt.

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.

BMW Fitments:

3 Series
E46 (99-05) > 320i
E46 (99-05) > 323Ci
E46 (99-05) > 323i
E46 (99-05) > 325Ci
E46 (99-05) > 325i
E46 (99-05) > 325xi
E46 (99-05) > 328Ci
E46 (99-05) > 328i
E46 (99-05) > 330Ci
E46 (99-05) > 330i
E46 (99-05) > 330xi
E46 (99-05) > M3
5 Series
E39 (97-03) > 525i
E39 (97-03) > 528i 99-00
E39 (97-03) > 530i
X5 Series
E53 X5 (00-06) > X5 3.0i M54
Z Series
E36/7 / E36/8 Z3 (96-02) > Z3 2.5
E36/7 / E36/8 Z3 (96-02) > Z3 3.0
E36/7 / E36/8 Z3 (96-02) > Z3 M - S54
Z Series
E85 / E86 Z4 (03-08) > Z4 M