OE Quality
60-Day Returns

Vemo V20-66-0004 Secondary Air Injection Pump Check Valve
Reliable Secondary Air Injection Pump Check Valve for BMW M3, Z3, and Z4
The Vemo VEMO Secondary Air Injection Pump Check Valve (Part Number V20-66-0004) is designed to maintain optimal emission control in select BMW models. Engineered for pneumatic operation, this diaphragm valve ensures efficient air injection system performance in BMW M3, Z3, and Z4 vehicles.
- Dimensions: 110 mm length, 95 mm width, 90 mm height
- Operating Mode: Pneumatic
- Valve Type: Diaphragm valve for precise air flow control
- Voltage: 12 V compatible with vehicle electrical systems
- Weight: 0.225 kg for easy handling and installation
About the VEMO Brand Line
The VEMO brand line specializes in emission control components, focusing on durability and compatibility with European vehicles. This secondary air injection pump check valve is part of VEMO's commitment to providing reliable pneumatic valve solutions that meet OEM specifications for BMW models such as the M3, Z3, and Z4.
Product Details and Specifications
This secondary air injection pump check valve operates pneumatically using a diaphragm valve mechanism, which helps regulate the flow of air injected into the exhaust system to reduce emissions. Its compact size—110 mm in length, 95 mm in width, and 90 mm in height—allows for seamless integration into the air injection system. The 12-volt rating ensures compatibility with the electrical systems of BMW M3, Z3, and Z4 models. Weighing just 0.225 kg, the valve is lightweight yet robust enough to withstand typical operating conditions.
Common Applications and Problem Resolution
- Prevents backflow in the secondary air injection system
- Helps reduce harmful emissions by ensuring proper air injection
- Addresses issues related to check valve failure such as rough idling or failed emissions tests
- Supports the proper functioning of the air injection pump in BMW M3, Z3, and Z4
- Mitigates exhaust system malfunctions caused by valve leaks or blockages
Installation Notes and Tips
When installing the Vemo VEMO Secondary Air Injection Pump Check Valve (V20-66-0004), ensure the valve is oriented correctly to maintain proper airflow direction. Verify that all pneumatic connections are secure and free of leaks. This valve is designed for direct replacement in compatible BMW M3, Z3, and Z4 models, so no modifications should be necessary. Consult the vehicle’s service manual for specific installation procedures and torque specifications.
Quality Assurance and Warranty
Vemo products undergo rigorous quality control to meet OEM standards for fit, form, and function. The VEMO Secondary Air Injection Pump Check Valve is manufactured to provide consistent performance and durability. While specific warranty details are not provided here, Vemo typically offers coverage against manufacturing defects. Refer to the product packaging or official documentation for exact warranty terms.
| Brand | Vemo |
| Part Number | V20-66-0004 |
| Position | VEMO |
| Height [mm] | 90 |
| Length [mm] | 110 |
| Operating Mode | Pneumatic |
| Valve type | Diaphragm valve |
| Voltage [V] | 12 |
| Weight [kg] | 0.225 |
| Width [mm] | 95 |
This part fits 15 vehicles. Search below:
| Year | Make | Model | Submodel | Body Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2008 | BMW | Z4 | M Roadster | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | |
| 2008 | BMW | Z4 | M Coupe | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | |
| 2007 | BMW | Z4 | M Roadster | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | |
| 2007 | BMW | Z4 | M Coupe | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | |
| 2006 | BMW | M3 | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | ||
| 2006 | BMW | Z4 | M Roadster | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | |
| 2006 | BMW | Z4 | M Coupe | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | |
| 2005 | BMW | M3 | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | ||
| 2004 | BMW | M3 | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | ||
| 2003 | BMW | M3 | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | ||
| 2002 | BMW | M3 | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | ||
| 2002 | BMW | Z3 | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | ||
| 2001 | BMW | M3 | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO | ||
| 2001 | BMW | Z3 | M Roadster | Convertible | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO |
| 2001 | BMW | Z3 | M Coupe | Coupe | 3.2L | L6 | N/A | ABS wheel speed sensor required for Headlight Washer Pump installation.; VEMO |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.