FREE100KSECRET

HELP!!! I have an issue with brakes locking up in 10 minute drive, or even if car is idling, only way to release brakes is to crack open side brake line on master cylinder. No trifecta, just brake warning light on. Problem started with taking car to independent who was supposed BMW expert, but when he replaced rear brake center iines which were rusted and rear brakes shut down. When he could not bleed the rears, turns out he did not have knowledge about diagnositic bleeding system. Said master cylinder was bad, replaced, no difference, so I pulled car out seeing he was no expert on BMW's. Brake warning light is on, I bought diagnostic bleeder, bled five times to insure all air was out of lines, Have only 60% braking, but 100% braking even if idling for 10 minutes. Crazy, and in searching the internet, only a few people have had same issue, but none posted resolution. Anyone on this forum have a clue. Only code I pulled was 72 pressure sensor, replaced, no change, anyone hae any solution to this rare brake locking problem?


Thanks