BMW 12V Li-ion 23101910 Repair Operatio Manual – #2026050785555

Price for operation manual:

Repair manual price: 200€ + Tax

This operation manual is a proprietary business secret that outlines the successful refurbishment process for BMS Battery system and battery recovery. By following the provided instruction steps, which include text, images, and videos, you will be fully equipped to repair the BMS effectively and efficiently. Manual non-refundable once unlocked

Info

You can charge this service: 400€
You need 2 labor hours to deploy this repair
BMW OEM CHARGE: 850€

Author: Vanja

Info

Common causes:

DEEP DISCHARGE
218219 – “Additional battery: aging detected”

“Aged auxiliary battery”

“Auxiliary battery relay stuck closed”

21A50A / 21A511 vezano uz starter timeout zbog AUX baterije

Info

Errors:

Unknown DTC codes

Battery has 0V on terminals

Info

Part numbers:

61 21 5 B3F 325 → 61215B3F325 → 5B3F325

61 21 5 A8D 7E0 → 61215A8D7E0 → 5A8D7E0

61 21 5 A4A F23 → 61215A4AF23 → 5A4AF23

61 21 5 A46 EA1 → 61215A46EA1 → 5A46EA1

61 21 5 A38 DE7 → 61215A38DE7 → 5A38DE7,

61 21 5 407 8B0 → 612154078B0 → 54078B0,

61 21 9 857 516 → 61219857516 → 9857516,

61 21 9 442 935 → 61219442935 → 9442935,

61 21 9 857 095 → 61219857095 → 9857095,

61 21 9 857 160 → 61219857160 → 9857160,

61 21 8 795 112 → 61218795112 → 8795112,

61 21 9 399 992 → 61219399992 → 9399992,

Info

Tools needed (prepare it) :

12V LAB supply

Opning tools

Fluke

Programmer

Info

Repair operation steps

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 1- Frist troubleshoot that you got same errors readed via diagnostic tool. You can manualy check if there is any voltage on battery terminals. 

 2- Remove 12V battery from the vehicle and start dissasemling it

 3- Remove top cover, together from bottom casing

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