Audi A4, S4, RS4 (B9/8W) | ABS Pump

Bosch 9 ESP/ABS (Anti-Lock Braking System) – Professional Repair & Remanufacturing

If your Audi is showing a ‘brake system fault – stop carefully’ message, has an illuminated ABS or traction control light, or you've identified the fault code C123EF0 through diagnostics, your Bosch ESP 9 ABS unit may be failing. Our expert repair service resolves this common issue, restoring your unit to full functionality.

Common Failures

• C123EF0 – Hydraulic Brake Booster Limit Value Reached (cannot be cleared)

• No brake fluid flow to one or more wheels
  

• ABS and traction control warning lights
  

Not Sure If It’s Your ABS?

If you're unsure what's behind your brake warning lights or fault codes, get in touch with our helpful team. We’ll talk you through the symptoms and help confirm if your ABS unit is the problem.