[Jake1z]

Alternator and battery were recently replaced. The water pump works. Battery connections are all connected properly. Ive searched but cant find a solution other than throwing parts at it.

Airbag light is also on for passenger side air bag.

codes are: 2e97 generator
2e84 electric water pump no communication
2ea1 oil stage sensor communication
2e8e intelligent battery sensor communication

[gbalthrop]

Originally Posted by Jake1z

Alternator and battery were recently replaced. The water pump works. Battery connections are all connected properly. Ive searched but cant find a solution other than throwing parts at it.
Airbag light is also on for passenger side air bag. [you SURE the MRS light is for airbag and NOT BST (Battery Safety Terminal). ALL the codes you list are related to BSD BUS per attached TIS circuit.]
codes are: 2e97 generator
2e84 electric water pump no communication
2ea1 oil stage sensor communication
2e8e intelligent battery sensor communication

Code Definitions per BMW Fault Code Lookup for 325i with MSV70 DME:

2E8E | BSD, message; intelligent battery sensor (IBS): Missing | msv70
2E84 | BSD, message; electric coolant pump: Missing | msv70
2E97 | DME: Generator | msv70
2EA1 | BSD, message; oil condition sensor: Missing | msv70

BSD Interface circuit per TIS:
https://www.newtis.info/tisv2/a/en/e...rnator/oYPEvM2

So your BSD Interface is O for 4. If there is a disconnection in that circuit, you will get one to ALL of the 4 codes you see, as the DME is NOT able to communicate with those components via the BSD bus. Just like pulling the Cat 5 cable out of the server, or turning off the Router.

Since you say the Battery was recently replaced, the BSD Connection (X13895) from the IBS to chassis connector over the Negative Battery Terminal is the most likely suspect. See the following Installation Location of X13895:
https://www.newtis.info/tisv2/a/en/e90-325i-lim/SQE9rMY

I assume you read the codes you posted with a BMW-specific Scan Tool or Software, connected to the DME. You need to connect to the MRS (Multiple Restraint System) Module and see what code you get related to the Airbag and/or Seatbelt warning light(s), or just use Functional Jobs to read ALL codes in all Modules if you have INPA. If you have code 93B2, that means your connector that goes into the BST at the Positive Battery Terminal is loose. See this TIS circuit diagram for BST (G19a) and Installation Location:
https://www.newtis.info/tisv2/a/en/e...rcuits/foXYCrP
https://www.newtis.info/tisv2/a/en/e90-325i-lim/S9WWsSN

Please let us know what you find,
George