Low Speed Braking Issue: Feature or Problem?

[X5M-ISH]

Happy Day Light Savings Time, friends.


Ever since I have had my 2006 4.8is, there is this 'thing' that the brakes do at low speeds which drives me up an f'ing wall. No other car (or other BMW's I have owned) do this.


During low speed braking, say under 25 mph, the pedal feel pulsates. This pulsating is extremely uniform. Also, this only happens during partial braking as in partial depression of the brake pedal. Like a throbbing feel; weak, firm, weak, firm, weak, firm several times a second.


Since owning, I have done an entire brake overhaul: rotors, pads, brake fluid flush, INPA ABS pump activation...there are zero bubbles in the brake lines; all of this did not change the pulsation. I vaguely remember coming across a thread where e53's have this brake assist feature to compensate for trailer weight or the e53 being pig'ish that loosely describes what my 4.8is is experiencing along with a place in INPA or BMW Scanner to disable it. Unfortunately I cannot find the thread. Please enlighten me if the ABS pump may be showing signs of wearing out or if true, a way to disable this stupid feature (if it is in fact one). Mahalo!