Audi A4 S4 B8 Turbocharger Vacuum Box 04L198716E

The Audi A4 S4 B8 Turbocharger Vacuum Valve is a turbocharger and parts component designed to precisely control the turbine's operation in Audi vehicles. A used vacuum valve allows for a cost-effective, yet technically correct, turbocharger repair, while maintaining factory-specified performance.

Specifications and technical data

• SKU: 04L198716E
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L198716E
• Substitutable numbers: 04L198716E, 04L 198 716 E, 40129040
• Category: Turbos & Parts

Purpose and function in the supercharging system

The Audi A4 S4 B8 turbine vacuum valve controls the turbine geometry or actuator by regulating the vacuum pressure. A properly functioning component ensures:

• stable increase in boost pressure over the full engine speed range,
• smooth transitions between low and high load,
• reducing the risk of turbine overload and related controller errors,
• more predictable response to the accelerator pedal.

Thanks to proper vacuum regulation, the valve supports the maintenance of appropriate vehicle dynamics and at the same time helps maintain correct combustion parameters.

Technical characteristics and compatibility

This component comes from the turbocharger and parts group, meaning it's specifically designed to operate in demanding environments with high temperatures and variable loads. Using the original Audi solution promotes:

• maintaining the factory control logic of the supercharging system,
• proper cooperation with the engine electronics,
• easier diagnosis in the event of any faults.

The component has a dedicated OEM part number and associated interchangeable numbers, making it easy to select from the catalog and verify compatibility with a specific engine version. If in doubt, it's best to compare the markings with service documentation or seek the assistance of a mechanic.

Used condition - conscious service choice

The Audi turbocharger vacuum valve shown here is in used condition, significantly reducing repair costs compared to purchasing a new component. This used turbocharger and parts part is a popular choice for:

• operational repairs of older Audi A4 and S4 B8 models,
• services specializing in the regeneration of supercharging systems,
• projects where the optimal price-to-functionality ratio is important.

Before installation, a standard technical inspection by a qualified workshop is recommended to confirm correct operation in a specific vehicle.

Benefits of using the original vacuum valve

Choosing an original solution from the Audi turbocharger and parts group translates into a number of practical advantages:

• factory fit to the intake system and engine control,
• maintaining the turbine operating characteristics specified by the manufacturer,
• reducing problems with adaptation and engine controller errors,
• easier computer diagnostics thanks to compatibility with service software.

For the user, this means more predictable vehicle behavior, better engine refinement and the ability to effectively use the turbocharger's potential.

Other Audi turbocharger vacuum valves and service knowledge

If you are looking for other turbocharger vacuum valves for Audi, check out the Audi turbocharger vacuum valves available in our assortment in the turbochargers and parts category to select the right part for your model and engine version.

When planning repairs for the VAG Group, it's worth exploring ways to optimize service costs. Practical tips for using the used parts market can be found in the article "Volkswagen Repair on a Budget? Discover How to Save on Original Car Parts ," which shows how to wisely choose original second-hand parts while maintaining vehicle safety and proper operation.