SKP SK911978 Secondary Air Injection Check Valve - Rear

Secondary Air Injection Check Valve for BMW X5

SKP SK911978 is a secondary air injection check valve for the rear position on select BMW X5 models. It is a direct-fit emission control component for 2001-2006 BMW X5 applications and is listed under part number SK911978.

Key Features

• Secondary air injection check valve for the rear location
• Fits 2001-2006 BMW X5, rear
• Emission control replacement part for air injection system service
• Cross-references part number 911978 for the same application
• SKP part number SK911978 for catalog matching and ordering

Detailed Description

This SKP secondary air injection check valve is used in the emission control system to manage airflow in the secondary air injection circuit. It fits 2001-2006 BMW X5, rear, and is a practical replacement when servicing the air injection system on BMW X5 vehicles. Use SK911978 when you need a rear secondary air injection check valve for the listed BMW X5 model years.

Common Issues It May Address

• Secondary air injection fault codes
• Restricted or improper airflow in the air injection system
• Emission test failures related to secondary air operation
• Check valve leakage or sticking
• Driveability concerns tied to emission control system faults

Installation Notes and Tips

Verify the rear position and vehicle year before installation. Inspect connected hoses, fittings, and surrounding air injection components for wear or contamination during service. Confirm the replacement matches the original part number SK911978 or cross-reference 911978 before installation on BMW X5 applications.

Quality Assurance

SKP catalogs this part as an emission control replacement for the specified BMW X5 fitment. Confirm vehicle identification and part number match before installation to ensure correct application.