BMW Secondary Air Injection Pump - Pierburg 7.21852.78.0

Product Information

A Secondary Air Injection Pump is part of a vehicle’s emissions control system. Its main purpose is to inject fresh air into the exhaust stream during cold starts. This extra oxygen helps the catalytic converter heat up faster and burn off excess fuel, reducing harmful emissions before the engine reaches operating temperature. The pump is usually electric or belt-driven and works only for a short time after startup.

• Check Engine Light (CEL) illuminated, often with fault codes (such as P0410, P0411, or related to “secondary air system”).
• Rough idle or hesitation on cold starts due to improper air-fuel mixture before the catalytic converter stabilizes.
• Failed emissions test or increased exhaust smell, as the system cannot reduce pollutants effectively during startup.

About Pierburg

Pierburg S.A. is a company that forms part of the KSPG AG Group, a worldwide leader in the design, development and production of automobile components. As a worldwide automotive provider, Pierburg S.A. holds a position as a leader in the automotive markets thanks to their competence in the areas of the reduction of emissions and secondary air management. The development of our products is carried out in close collaboration with well-known automotive manufacturers.

With a history beginning with the start of the automobile industry, Pierburg’s reputation has been that of superior engine expertise. Pierburg remains a pioneer in advanced pump technology working as an OEM (original equipment manufacturer) for many European auto brands. Their product line ranges from coolant pumps, oil pumps and re-circulating water pumps, to vacuum pumps and many more. For every function, Pierburg produces a solution that provides the highest reliability, dependability, and functionality for automobiles.

Even before the talks of climate change, Pierburg had been working on finding solutions for ecological friendly vehicle technology, in order to slow fuel consumption and decrease emissions. One example is Pierburg’s line of on-demand oil and water pumps only run when needed resulting in reduced engine emissions.