This does seem to be a common problem. My hydraulic unit and ecu on 06 sport was changed a month or so ago but i was on extended warranty so only paid my excess.
By the way "us_abm" £125 represents an hour not a days labour for your diagnosis.
MAZDA CX5 2.2D 175 AUTO AWD SPORT NAV.
E90 320D M-Sport Lemans blue/beige leather/wood/auto/lumbar support/folding mirrors/through load/bluetooth/pro satnav,i-drive/voice control.