BMW 3-Series Air Injection Pumps & Components

If your BMW 3-Series was produced between 1996 and the mid-2000s, it is likely that you can face “check engine” fault codes related to the secondary air injection system. This system comprises an air pump, vacuum control switch, exhaust manifold input check valve, and also input and vacuum hoses. Besides, there is an electrical input circuit to the vacuum control switch. The system works by forcing air into the exhaust during cold starts. This way, exhaust gasses are fed with oxygen, which helps to burn harmful emissions more completely.

A malfunctioning secondary air injection system in your BMW 3-Series can trigger the “Secondary Air Flow Too Low” fault code. As a rule, it is caused by one of the following reasons: a malfunctioning air pump, problems with exhaust manifold check valve, or clogged air injection ports. Other parts, such as leaking vacuum lines, may also trigger issues that eventually lead to the air pump failure. In most cases, the pump is the first component you should check when diagnosing the system. If you need a quality replacement for the pump, our store provides an exhaustive collection of BMW 3-Series air injection pumps & components, providing exceptional quality and durability at a reasonable price.