Secondary Air Pump, Pierburg - E53 X5 3.0i 00-03

This part is listed by BMW as BMW part number 11721437700 (11 72 1 437 700) and is described as an OEM Secondary Air Pump for 2000-2003 E53 X5 3.0i. These pumps are sometimes called auxiliary air pumps or smog pumps, as they are emissions related equipment.

Are you getting a check engine light and faults codes pointing to your secondary air injection pump? The secondary air pump is an emissions pump that pumps fresh air into the exhaust during cold starts. This helps burn fuel on a cold engine, and when the pump runs it sounds like a little vacuum cleaner under your hood. When this pump fails, the pump doesn't cycle and the emissions control computer records a fault, triggering a check engine light. This will make you fail an emissions test, and may prevent you from passing a state emissions inspection.

This is an OEM air pump manufactured by Pierburg - the original supplier to BMW for this part, as well as many other electrical parts. 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.

This part number replaces previous BMW part number 11721437911.

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