Pierburg 7.21852.85.0 Secondary Air Injection Pump

Overview of the Pierburg Secondary Air Injection Pump

The Pierburg 7.21852.85.0 is an electric secondary air injection pump designed specifically for select BMW models. This component plays a crucial role in the emission control system, helping to reduce harmful exhaust emissions during engine warm-up.

• Electric operating mode for efficient air injection
• Compatible with BMW 323i, 323is, 328i, 328is, and M3 models
• Operates on standard 12-volt electrical systems
• Technical Information Number: Si 1150-11 for reference
• Part number 7.21852.85.0 ensures exact fit and function

Technical Details and Compatibility

This secondary air injection pump from Pierburg is engineered to meet the specifications required by BMW emission control systems. Operating electrically at 12 volts, it integrates seamlessly with the vehicle’s existing wiring and control modules. The pump is designed to deliver secondary air into the exhaust stream, aiding in the reduction of emissions during cold starts. The part number 7.21852.85.0 corresponds to the Technical Information Number Si 1150-11, providing a reliable reference for installation and maintenance.

Compatible with BMW 323i, 323is, 328i, 328is, and M3 models, this pump supports the emission control system’s air injection function, ensuring compliance with environmental standards.

Purpose and Common Issues Addressed

• Reduces cold start emissions by injecting air into the exhaust manifold
• Helps prevent catalytic converter damage caused by unburned fuel
• Resolves issues related to failed or weak secondary air injection pumps
• Improves overall emission system performance and vehicle diagnostics
• Addresses check engine light triggers related to air injection faults

Installation Notes and Tips

• Ensure vehicle battery is disconnected before installation to avoid electrical hazards
• Verify compatibility with BMW 323i, 323is, 328i, 328is, and M3 models prior to installation
• Follow Technical Information Number Si 1150-11 guidelines for proper mounting and electrical connections
• Inspect related hoses and valves for wear or damage during replacement
• Test the pump operation after installation to confirm proper function

Quality Assurance and Warranty

Manufactured by Pierburg, a recognized supplier of emission control components, this secondary air injection pump meets OEM standards for fit and function. While specific warranty details may vary, Pierburg products typically come with a limited warranty covering defects in materials and workmanship. Refer to the product documentation or supplier for exact warranty terms.