TechnicianVision · Knowledge base
48-Volt Mild Hybrid Systems: BMW
I-CAR · November 16, 2023 · BMW
Summary
This article outlines the key features and safety protocols for BMW's 48-volt mild hybrid system, which is standard on all vehicles with the B58 engine. It highlights that the system uses purple warning labels and cables for identification, automatically enters a maintenance power-down mode when the hood is opened, and requires negative battery cable disconnection for certain repairs.
What to do on the job
Identify the purple 48-volt cables and labels, and ensure the system is properly powered down by opening the hood or disconnecting the negative battery cables as specified by BMW repair procedures before performing repairs.
How to use it
Use this document to justify the necessary labor time for safety protocols when working on BMW vehicles with the B58 engine. It supports the inclusion of battery disconnection procedures and safety checks by citing BMW's official technical guidelines regarding the purple-coded 48-volt system and its maintenance mode.
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