Bosch 000-140-70-85 Secondary Air Injection Pump

The Bosch 000-140-70-85 is a genuine OEM secondary air injection pump designed for Mercedes-Benz vehicles. This electric air pump is a critical component of the vehicle's emissions control system, responsible for reducing harmful exhaust emissions during cold starts when the catalytic converter has not yet reached operating temperature.

Function and Operation:

This pump injects fresh air into the exhaust stream during the first 60-100 seconds after a cold start, when the engine runs rich to facilitate warm-up. The additional oxygen allows unburned hydrocarbons and carbon monoxide to undergo secondary combustion in the exhaust system, significantly reducing emissions before the catalytic converter reaches its effective operating temperature of approximately 300-350°C. Once the engine is warm and lambda control becomes active, the system automatically deactivates.

Key Features:

• Genuine Bosch OEM quality for precise fit and reliable performance
• Electric motor-driven vane pump design for efficient air delivery
• Integrated with engine control unit for automatic operation
• Helps vehicles meet strict emissions standards and pass emissions testing
• Essential for proper functioning of the emissions control system

Cross-Reference Part Numbers:

Mercedes-Benz 0001407085, Bosch 0-580-000-017, 0580000017

A properly functioning secondary air injection pump is essential for passing emissions tests and maintaining compliance with environmental regulations. Failure of this component typically triggers a check engine light with diagnostic trouble code P0410.