Audi A4 B8 ABS Pump Modulator Hydraulic Brake Control Unit 5Q0614517FA

Audi A4 B8 ABS Pump Modulator Hydraulic Brake Control Unit is a specialized brake system component responsible for the precise control of the ABS system and ESP electronic stability program in your Audi. Thanks to its factory design tailored for this platform, the pump ensures consistent operation with the vehicle's electronics and allows for predictable, safe vehicle behavior on the road. This is a solution for users looking for a proven, technically matched component instead of universal replacements.

Specifications and technical data

• SKU: 5Q0614517FA
• Mark: Audi
• Condition: Used
• OEM Part Number: 5Q0614517FA
• Substitutable numbers: 5Q0614517FA, 5Q0 614 517 FA, 8K0614517DS, 8K0 614 517 DS
• Category: ABS Control Modules

Purpose and function in the brake system

The ABS ESP pump in the Audi A4 B8 plays a key role in managing pressure in the brake circuits during emergency braking and in situations where traction is lost. The controller integrated with the hydraulic block analyzes signals from wheel speed sensors and, based on this, controls the valves to:

• limit wheel locking during emergency braking,
• stabilize the driving path during sudden maneuvers,
• support the operation of the ESP system in corners and on slippery surfaces.

Thanks to this, the ABS and ESP system can work in a repeatable and predictable manner, which translates into better vehicle control during daily use.

Controller design and vehicle integration

The element belongs to the ABS Control Units group, which means it combines a hydraulic part with an electronic control module. This architecture allows for:

• direct communication with the vehicle's data bus,
• precise pressure dosing in individual brake circuits,
• consistency of operation with Audi's factory safety algorithms.

Proper matching to the A4 B8 platform reduces the risk of software compatibility issues, communication errors with other controllers, or incorrect operation of warning lights on the instrument cluster.

Benefits of using an original ABS ESP controller

Using an ABS ESP pump dedicated to Audi allows you to maintain brake system performance parameters in accordance with the manufacturer's specifications. In practice, this means:

• stable operation of safety systems during straight-line braking and in corners,
• proper cooperation with driver assistance systems,
• easier computer diagnostics if service is required.

The used product is a solution that allows you to optimize repair costs while maintaining the factory logic of the ABS and ESP system.

Selection, installation, and diagnostics

Before installation, it is recommended to verify the compatibility of the controller with the specific vehicle equipment version and to perform adaptation and bleeding of the brake system in accordance with the service procedure. After installation, it is worth performing:

• error reading and actuator testing using a diagnostic tester,
• checking ABS operation on a safe road section with varied traction,
• verifying the correct operation of the ESP during simulated emergency maneuvers.

This approach allows you to confirm that the ABS controller is working correctly with other modules in the vehicle and does not generate additional system errors.

If you are planning a comprehensive repair or upgrade of the braking zone in your Audi and need other elements from the same group, such as control modules, hydraulic blocks, or electronic units, check the available parts in the Audi ABS Control Units category.

Safe purchase of a used ABS ESP system

When choosing a used ABS ESP controller, it is worth paying attention to its origin history, the possibility of diagnostics before installation, and compatibility with the vehicle's equipment version. To better prepare for the purchase and assess the condition of brake system components, the following guide will be helpful: Second-hand brake system: how to safely choose discs, calipers, and ABS?. Thanks to it, you will more easily plan your repair and reduce the risk of choosing the wrong components.