The ABS warning lights on my 1994 BMW 840 are now extinguished; our mechanic fitted a pre-owned ABS pump sourced from eBay (1998-2000 BMW 540, 528, Z3, 740i ABS Anti-Lock Brake Pump Module 0265217000).
The mechanic bled the brakes twice and then a third time to address a new issue exhibited by the automobile following the installation of a previously owned ABS pump acquired on eBay.
The brake pedal provides spongy resistance at around one-quarter of its journey, yet effectively halts the vehicle. However, once halted, if I persist in pressing the pedal, it ultimately descends to the floor.
I have own this California Car since February 2011, with the ABS system operational. Approximately around 2012, the ABS pump malfunctioned. Nonetheless, the brakes have consistently provided excellent performance, regardless of the functionality of the ABS. Nevertheless, I grew weary of the two ABS warning lights, and the appropriate course of action was to rectify the ABS issue. The car currently has 226,500 miles and operates excellently, by the way.
What should I attempt next to resolve this issue?
I appreciate your assistance.