Hi everyone! Think this is my 1st post!
Im just in the process of trading in my mazda 3 mps for an e92 335i se, and 4 days ago my mazda suffered the same abs/dsc pump malfunction.
Its all a bit of a scandal, millions of cars have been fitted with a similar dsc/abs control unit, and 1 or 2 components WILL fail. VW groups cars, mazdas, and bmw's all have a related part, and thats why we see these failures.
Hope it helps someone, but if you dont want to pay crazy dealer prices for
a) a new unit - £1000-1500
b) a fix-it dealer kit (VW and mazda has these, dont know about BM) - £600
there are a few companies who now specialise in replacing the failed component.
The two i know of are ecu-testing and bba-reman.... think they charge about £150-£250 for the repair!
Hope that helps!