I replaced the first alternator which ran for a month , left the car for 2 days and the battery was low but it started and ran it for a bit. Driving for a bit , the goes into limp mode and then died. So thinking the battery somehow got ruined, I replaced the battery and after 2-3 days it’s died again. The previous owner also replaced the alternator 3 weeks before I brought it. I was reading some forums and it mentioned the vent valve control or something...so I was wondering is there some answers in this situation??

 

Hey did you ever get this fixed, having a similar issue with my 2012 g37