The ABS/ESP module is one of the most safety-critical electronic components on the Audi RS4. When it fails, the symptoms range from a constant ABS warning light with disabled anti-lock braking (which means full-pressure braking can cause a wheel lockup that the system would normally prevent), to wheel-specific brake imbalance from a stuck solenoid valve, to complete loss of stability control intervention during aggressive driving. On a 420 HP all-wheel-drive performance car, a working ABS/ESP module is essential.
A verified used Audi RS4 ABS computer restores OEM braking and stability function at a fraction of new dealer pricing, which is increasingly important as the B7 RS4 platform ages and new parts become harder to source. We bench-test every module before shipping, inspect housing integrity, verify hydraulic ports and connector pins.
Get your RS4 back to factory braking and stability performance with a tested ABS computer today.
The Audi RS4 ABS/ESP module is a combined unit that integrates the hydraulic control valve block with the electronic control module in one sealed aluminum housing. The hydraulic block contains multiple solenoid valves (typically 8 to 12) that can rapidly modulate brake fluid pressure to each wheel individually, a high-pressure pump and accumulator that build pressure when ESP intervention is needed, and integrated brake fluid passages routing to each of the four wheels.
The electronic module on top of the hydraulic block contains a microcontroller managing all functions, valve driver circuits for the solenoids, pump motor driver, and sensor input conditioning for the four wheel speed sensors, the yaw rate sensor, the steering angle sensor and the lateral acceleration sensor. Communication with the engine ECU, transmission ECU and instrument cluster is via CAN bus.
Audi has produced four RS4 generations: B5 RS4 (2000-2001 Avant only, Europe), B7 RS4 (2006-2008 sedan/Avant/Cabriolet, US sold), B8 RS4 (2012-2015 Avant only, Europe), B9 RS4 (2017+ Avant only, Europe). The B7 is the only RS4 generation that received US certification and dealer sales. If you have a US-spec RS4, it is a B7. The B5 has come to the US as gray-market or 25-year-import vehicles, B8 and B9 have not.
Our team works with Audi Sport platforms regularly including B7 RS4, C5 RS6, C6 RS6, B8 RS5 and others. We will help you confirm RS-specific vs A4/S4 part numbers, flag the coding tool requirements, and recommend independent Audi coding specialists in your region if needed. Call (240) 301-0095 with your VIN.
| Vehicle | Compatibility |
|---|---|
| Audi RS4 B7 Sedan | US 2006 to 2008 with 4.2L FSI V8 (420 HP) and 6-speed manual quattro |
| Audi RS4 B7 Avant | US 2007 to 2008 wagon body, same powertrain |
| Audi RS4 B7 Cabriolet | US 2008 convertible body, same powertrain |
| Cross-Reference (Hardware) | B7 A4 quattro and B7 S4 may share hardware but require RS4-specific software coding, not direct plug-and-play replacement |
| NOT Compatible | Audi RS4 B5 (Europe only, different ABS generation), Audi RS4 B8 (Europe only, different platform), Audi RS4 B9 (Europe only, different platform), Audi A4/S4/RS4 outside B7 generation, and any non-RS Audi without specific cross-reference verification |
| Part Type | ABS/ESP hydraulic control unit with integrated electronic module |
|---|---|
| Vehicle Application | Audi RS4 B7 (US 2006 to 2008), all three body styles |
| Platform | Bosch ESP 8 |
| Functions | ABS, ESP, ASR, EBD, Brake Assist |
| Housing Material | Sealed aluminum |
| Hydraulic Block | Multiple solenoid valves, high-pressure pump, accumulator |
| Communication | CAN bus to DME, TCU, cluster, body computer |
| Voltage | 12V DC battery feed plus switched ignition |
| Connector | Multi-pin sealed connector |
| Approximate Weight | 4 to 6 lbs assembled |
| Coding Required | Yes, VCDS or Audi VAS scan tool |
| Coding Cost Estimate | $100 to $250 at independent Audi specialist |
| Brake Fluid Bleed Required | Yes, after install |
| Installation Difficulty | Advanced DIY or shop work, 2 to 4 hours including bleed and coding |
| Service Life | Typically vehicle life, premature failure from flooding or moisture in fluid |
| Price | $329.00 |
ABS pump on my 2008 RS4 sedan died after a winter of salt exposure. Audi dealer quoted me a major bill and a 3-week wait. Vaz had a verified module in stock with bench test paperwork showing CAN response and power-on. Donor history was disclosed (mileage was reasonable). Took it to my independent Audi specialist for the install, coding and bleed, total cost was a fraction of dealer estimate. Module works perfectly, ABS warning lights cleared first try after coding. Excellent for a B7 RS4 part.
Replaced the ABS module on my 2007 RS4 Avant (rare US car). Vaz confirmed the part number cross-reference against my VIN before shipping. Module arrived clean, port threads were sharp, connector pins all looked good. Independent coding took about 90 minutes at my shop. One star off because there were minor surface scratches on the housing from prior service that they did disclose but I noticed slightly more in person than expected. Functionally everything is correct.
Note: coding is the install shop's responsibility, NOT covered by our warranty. Verify your vehicle is Audi RS4 B7 (2006-2008). Contact (240) 301-0095 within 15 days of delivery.
