Audi RSQ3 8U CTSA Vacuum Solenoid Valve 2.5 TFSI Petrol Engine 06H906517T

Audi RSQ3 8U CTSA Vacuum Solenoid Valve 2.5 TFSI is a precision component of the vacuum control system in petrol engines, designed specifically for the 2.5 TFSI unit. It is responsible for stable, controlled switching of vacuum circuits, which translates into proper operation of engine accessories and predictable response to load. Thanks to a design that meets Audi's requirements, this solenoid valve ensures consistent performance parameters under sporty operating conditions.

Specifications and technical data

• SKU: 06H906517B
• Mark: Audi
• Condition: Used
• OEM Part Number: 06H906517B
• Substitutable numbers: 06H906517B, 06H 906 517 B
• Fuel type: Petrol
• Category: Solenoids

Purpose and function in the vacuum system

The presented valve belongs to a group of vacuum control elements in a petrol engine, where fast and repeatable response to control signals from the vehicle's electronics is crucial. In 2.5 TFSI units, it is responsible for:

• precise opening and closing of vacuum circuits depending on engine load,
• stabilization of cooperating components (e.g., adjustment elements in the intake system),
• maintaining appropriate operating conditions in dynamic modes and daily use. Thanks to proper vacuum flow control, the valve helps maintain repeatable engine performance parameters, which is particularly important in high-performance petrol units used in the RSQ3 model.

Design and fitment for Audi RSQ3 8U CTSA

As an element from the Solenoid valves group, this component has been designed to work with the Audi vehicle's electrical and vacuum installation. The appropriate electrical connector and vacuum ports allow for installation in place of the factory valve without the need for any modifications to the installation. Selecting the right valve for a specific engine configuration is crucial for maintaining correct control logic. Using a component that complies with the manufacturer's requirements reduces the risk of engine control unit errors, unstable idle, or incorrect throttle response.

Operating characteristics in a petrol engine

Engines powered by petrol require precise vacuum management, especially in turbocharged units. The vacuum solenoid valve in such a system:

• operates in a wide range of temperatures and loads characteristic of TFSI units,
• must ensure vacuum circuit tightness under variable boost pressure,
• should respond quickly to changes in the control signal to maintain consistent accessory performance. A properly selected valve helps reduce performance drops resulting from leaks or delayed vacuum system response, which is important for both dynamics and engine refinement.

Component condition and service application

The offered valve comes from the secondary market, which makes it an attractive solution for service repairs when the priority is to maintain the original specification at reasonable costs. This type of component is particularly useful in situations where:

• errors related to the vacuum system are stored in the engine control unit,
• unstable operation of vacuum-dependent accessories is observed,
• it is necessary to replace the element with a part consistent with factory specifications. Using an original solenoid valve allows you to maintain the factory operating characteristics of the power unit without interfering with the control maps.

System expansion – related Audi Solenoid valves

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as additional control valves, vacuum adjustment elements, or auxiliary solenoid valves, check the available parts in the Audi Solenoid valves category. When planning repairs within the vacuum control system and other components, it is also worth paying attention to the selection of appropriate used parts, especially in the case of more extensive service work after a collision or failure. More practical tips on choosing elements from the secondary market can be found in the article Post-accident repair of your car: why are used body parts a better choice than replacements?.