Original BMW battery BMW E81 3-doors 51382.BMW parts catalog ETK contains detailed information on spare parts for cars manufactured by BMW since 1928.

Important! ----------------------------------------
Please observe without fail the following information on correct battery replacement! - ISTA Document
RA_61_20_Notes_on_battery_replacement ----------------------------------------
For further information, see: - Master document, battery
ISTA_Document_SI_61_07_02_(875) ----------------------------------------
To ensure correct electrical system functions, it is essential to install the original battery stored in the vehicle order (battery size and battery type)! ----------------------------------------
On vehicles with IBS (Intelligent
Battery Sensor) the battery must be registered via the diagnosis system (ISTA) and thereby logged in to the vehicle electrical system. ----------------------------------------
Standard batteries can always be replaced with AGM batteries matching the same specification.
In the case of this procedure, you must, in addition to registering the vehicle via ISTA/P, carry out a vehicle coding as follows: ----------------------------------------
Read out battery size and registration in the vehicle electrical system:
ISTA->Service functions->Body->Power supply->Register_battery_replacement->
Test plan ----------------------------------------