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      01-08-2013, 07:25 PM   #5
Fsarc
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Drives: 2011.5 E92 M3 LMB
Join Date: Nov 2007
Location: BC-Northern NJ


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Quote:
Originally Posted by Orange fever View Post
All I know is one is white and the another one is black
Yes- black is AGM, white is SLA. If you have an OEM SLA battery you can change to an AGM, it just requires registering/coding it as one. 2008 might be SLA.

As per realoem- "Important notice!
----------------------------------------
Compliance with the following
information and instructions for correct
battery replacement is absolutely
mandatory!
- ISTA Document
RA_61_20_Instructions_for_battery_
replacement
----------------------------------------
For additional information, see:
- Battery master document
ISTA_Document_SI_61_07_02_(875)
----------------------------------------
The original battery (battery size and
type) as indicated in the vehicle's
order specifications must always be
installed to ensure correct operation of
the on-board electrical system!
----------------------------------------
If the vehicle is equipped with an IBS
(Intelligent Battery Sensor), the
battery must be registered via the
diagnostic system (ISTA); this process
also registers the battery with the
vehicle's on-board electrical system.
----------------------------------------
Standard batteries can always be
replaced by AGM batteries with the same
specifications.
Following either type of replacement,
the vehicle registration process in
ISTA/P must be supplemented by a vehicle
coding procedure, which is carried out
as follows:
----------------------------------------
Read out battery size and registration
from onboard electrical system:
ISTA->Service functions->Body->Voltage
supply->Register_battery replacement->
Test plan"