Battery control unit VW PHAETON 2003

OEM: 3D0915181A

Disassembled car photo

Engine running

  • Tested before shipping
  • Guaranteed quality
  • Fast delivery 3–7 days
  • 14-day returns

What is this part and why does it matter?

The battery control module (battery management system, BMS) monitors battery condition, manages charging behaviour, and reports status to the vehicle’s other electronic systems.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

  • Battery warning light on the dashboard
  • Poor battery performance despite the battery itself testing healthy
  • Diagnostic fault code related to the module itself

Installation information

Mounted at or near the battery terminal, connecting to the vehicle wiring harness — often requires registration/coding of a new battery after replacement.

Donor vehicle description

VIN
WVWZZZ3DZ48007275
Make, model
VW Phaeton
Year
2003
Engine
Benzīns 3.2 177KW AYT
Transmission
Automatiska GML
Drive
Priekšēja
Stūre kreisajā pusē
Colour
G4R

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  • Outside mirror, right VW PHAETON 2003

Frequently asked questions

Modern vehicles rely on precise battery health data to optimise charging, manage start-stop function, and prevent premature battery wear — this module tracks that data continuously.

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