This is a specialist repair service for your existing ABS pump/module. You must send your unit to us for testing and repair – this is not a replacement part. The BMW 3 Series F30 / F31 MK100 ABS pump is a known failure point, particularly relating to internal hydraulic faults. These issues commonly result in uneven braking performance and the inability to properly bleed the braking system. Faults may begin intermittently but will typically become permanent if left unresolved. At Essex Recons, we professionally rebuild ABS units with a strong focus on hydraulic repair using upgraded, higher-rated internal components to eliminate repeat failures. Every unit is fully bench tested before and after repair using advanced simulation equipment to ensure correct operation. All original vehicle data remains unchanged. Lack of braking effort to one of the callipers Pulling to either side upon braking No fluid being passed through to the callipers (unable to bleed the system). Each unit is fully tested before and after repair to ensure full functionality. WHAT YOU CAN EXPECT. During busy periods this may vary. This listing is for a repair service only.