Professional ABS Pump Repair Service. BMW 3 Series & 4 Series ATE MK100 ABS Pump Repair. This listing covers the professional repair of the ATE MK100 ABS pump fitted to the BMW 3 Series and BMW 4 Series. Also referenced as the Continental MK100 or Teves MK100, this unit is subject to a known internal design flaw that causes the hydraulic section to deteriorate over time. The fault develops internally within the pump body and is not always detectable through standard diagnostics. Many 3 Series and 4 Series owners experience braking issues – including wheel locking – without any warning lights on the dashboard or fault codes stored in the system. A clean diagnostic scan does not rule out a failing MK100. Common Symptoms on the BMW 3 Series & 4 Series. One or more wheels locking or binding under braking. Vehicle pulling to one side when braking. Brakes not fully releasing after the pedal is released. ABS or DSC warning light illuminated on the dashboard. Uneven or inconsistent braking performance. Fault code U3000 stored. No fault codes stored despite obvious braking issues. Important: The MK100 can fail without illuminating any warning lights or storing fault codes – the wheel locking symptom can appear suddenly with no prior warning. Is This Repair Right for Your Vehicle? This repair targets faults that are internal to the ATE MK100 pump itself. It is most appropriate where. One or more wheels are binding or locking up under braking. The ABS or DSC warning light may or may not be on – the MK100 can fail without triggering any dashboard warnings. Fault codes may or may not be present – the MK100 can fail without storing any codes at all. The rest of the braking system (pads, discs, calipers, brake lines) is in good condition. Not certain whether this repair suits your fault? Send your ABS pump – Package your unit securely and drop it at any Post Office. No need to drain brake fluid first. We repair and test your unit – As soon as your unit arrives, we begin work immediately using dedicated ABS bench testing equipment. Most repairs are completed and dispatched within 48 hours, excluding weekends and bank holidays. Simply refit it – no coding or programming required, and your vehicle is ready to drive. Items sent outside our process are not covered. Why Choose Blackstone Auto Electronics? Plug and play – no coding, programming or calibration needed after fitting. Specialist ABS technicians with dedicated bench test equipment. Compatible OEM Part Numbers. This repair covers BMW 3 Series and 4 Series units including (but not limited to). Unsure whether your part number is covered? Does the ATE MK100 need coding or programming after the repair? No – this is a fully plug and play repair. Once you refit your unit, it works immediately without any coding, programming or calibration. How long does the repair take? Once your unit arrives, we typically complete the repair and dispatch it within 48 hours, excluding weekends and bank holidays. What if the repair doesn’t fix the fault? We test every unit thoroughly before returning it. Can I drive the vehicle while waiting for the repair? We strongly advise against driving while your ABS pump is faulty, as braking performance may be significantly compromised. Do I need to drain the brake fluid before sending the unit? No – you can send the ATE MK100 without draining the brake fluid first. Small residual amounts of fluid in the pump body are completely normal and present no problem for transit. Full details are available in our terms and conditions. BMW 3 Series & 4 Series – all engines and body styles. Covers both standard ATE MK100 and 46-pin DSC variant.