[g9sBMW]

My 2007 328i is having a problem starting. I replaced the battery about 3 weeks ago because I could not leave the radio or headlights on more than a minute without the battery icon flashing in dashboard.

After battery replacement ( even before ) my car would start but I would hear ticking noised from behind the glove box where the fuse box is located, it would still start and ticking would go away in about 30 seconds.

Now it will not start at all, the starter does not even try to crank.

Scanned it with an Autophix 7810 and got the following error codes from the

CAS
A0CO Terminal 15
A123 Short Circuit Hall Sensor
A0B4 Engine start, starter operation
A0A9 Control-Unit fault
A122 Short Circuit Hall Sensor

ECM
2DC3 Monitoring Terminal 15


Before I start replacing randome parts ( starter, relays, CAS module etc )
like to get some opinions here.

thanks for looking.

[Ferragamo_n54]

Did you ever find the fix? I am having exact same issue already replaced starter and battery.

[chilledn52]

Originally Posted by g9sBMW

My 2007 328i is having a problem starting. I replaced the battery about 3 weeks ago because I could not leave the radio or headlights on more than a minute without the battery icon flashing in dashboard.

After battery replacement ( even before ) my car would start but I would hear ticking noised from behind the glove box where the fuse box is located, it would still start and ticking would go away in about 30 seconds.

Now it will not start at all, the starter does not even try to crank.

Scanned it with an Autophix 7810 and got the following error codes from the

CAS
A0CO Terminal 15
A123 Short Circuit Hall Sensor
A0B4 Engine start, starter operation
A0A9 Control-Unit fault
A122 Short Circuit Hall Sensor

ECM
2DC3 Monitoring Terminal 15


Before I start replacing randome parts ( starter, relays, CAS module etc )
like to get some opinions here.

thanks for looking.

You need to get your car coded for the battery. I would look around your area who does BMW coding and check with them if they are able to do it. You will need to replace it with the exact same battery for CCA and Amps for you not too.

When the CCA (Cold Cranking Amps) or Amperage does not match, the vehicle either demands more or less from the battery which can cause you some of the codes