Hella 7.22166.38.0 Secondary Air Injection Pump

The Hella 7.22166.38.0 is a high-quality secondary air injection pump designed to reduce harmful emissions during cold engine starts. This electric pump introduces fresh air into the exhaust stream ahead of the catalytic converter, helping to burn off unburned hydrocarbons and carbon monoxide that are produced when engines run rich during startup.

Key Features:

• OE quality construction manufactured by Pierburg for Hella
• Direct replacement for BMW OE part number 11721433818
• Electric 12V operation for reliable performance
• Helps catalytic converter reach operating temperature faster
• Essential for passing emissions testing and compliance
• Prevents check engine light codes related to secondary air system flow

This secondary air pump is a critical emissions control component that activates during cold starts to inject ambient air into the exhaust manifold. When this pump fails, it can trigger fault codes such as "Secondary Air System Flow Too Low" and illuminate the check engine light, preventing the vehicle from passing emissions inspections. Manufactured to OEM specifications, this Hella pump delivers the quality and durability expected from one of the automotive industry's premier suppliers.

Common Applications: BMW E36 318i (M44 engine), 318is, 318ti, Z3 1.9 and other compatible BMW models using OE number 11721433818.