Secondary Air Injection Pump Replacement Part Numbers: 11727553056, 11 72 7 553 056, 11721435364, 11 72 1 435 364, 11521435365, 11 52 1 435 365, 33-2100M, ADP10330101S Replacement for 1999-2000 BMW E46 323i 323ci 328i 328ci; Replacement for 2001-2003 BMW E46 325i 325ci - only with M54 engine; Replacement for 2001-2005 BMW E46 325ci Convertible 325xi; Replacement for 2001-2003 BMW E46 330i 330ci; Replacement for 2001-2005 BMW E46 330xi The secondary air injection pump (also referred to as a smog pump or SAI pump) is responsible for lowering the number of carbon emissions that come out of the tailpipe of a vehicle. This is necessary since a vehicle engine is never 100% efficient in the combustion process. Secondary air injection pump failure is easy to recognize. If you notice at least two of the following symptoms, you need to get it serviced right away: 1) Check Engine Light; 2) Failed Emissions Test; 3) Weak Acceleration; 4) Engine Stalling; 5) Low Idle Package includes 1x smog air pump with 3x air pump mount. Please confirm that the OE part number and the applicable model match your vehicle before placing the order. If you are not sure if our products are compatible with your model, please contact us.

I. OEM Part Number:

11 72 1 435 364, 1 435 364

11 72 7 553 056, 7 553 056

11 72 1 435 365, 1 435 365

33-2100M

ADP10330101S

II. The Part will fit the followings:

Replacement for 1999-2000 BMW E46 323i 323ci 328i 328ci

Replacement for 2001-2003 E46 BM-W 325i 325ci - only with M54 engine

Replacement for 2001-2005 E46 BM-W 325ci Convertible 325xi

Replacement for 2001-2003 E46 BM-W 330i 330ci

Replacement for 2001-2005 E46 BM-W 330xi

Please be sure to compare carefully with Pictures or OE number before buying items!

If you are not sure this part is correct, please feel free to email us and we'll reply you as soon as possible!