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This hose is part of the secondary air pump system on 1999-3/2003 E46 323i/325i/328i/330i models. The secondary air pump adds fresh air to the exhaust to help with cold start emissions and to heat the catalytic converters and O2 sensors. A broken hose likely won't cause any reliability or drivability issues but may cause a check engine light or lead to premature failure of cats or O2 sensors.
This part is manufactured by an aftermarket supplier of European auto parts, including many engine components. While not carrying OEM status, this part follows the design of the original very closely and uses similar materials. An aftermarket part may even have the same TUV approval as its OEM counterpart. The brand may even be OEM to another manufacturer besides BMW. This aftermarket brand has a two year warranty - the same as Genuine BMW and OEM brands.
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
$9.49
Air Pump Pressure Hose, URO - E46 323i/325i/328i/330i -3/03
Replace aging hoses before they cause greater frustration or a serious failure. Direct replacement hose for BMW part #11727555680
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