Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Buses And Control Units In The E65 And E66
The main buses in the E65 and E66 are called: K-CAN P, K-CAN S, MOST, byteflight , Local CAN, PT-CAN.
From March 2005, the AHL control unit (adaptive headlights) is integrated into the light module. The light module is connected to the K-CAN S and the PT-CAN.
- > E65 and E66 from 03/2005: Buses and control units
To support the workshops, a description of the predecessor version of the bus structures on the E65 and E66 is also provided:
The key modification compared to the original version of the bus structures on the E65 and E66 is:
SIM and ZGM have been combined to create the SGM. The SGM is the central data interface for all buses and control units.
(SIM: safety and information module)
(ZGM: central gateway module)
(SGM: safety and gateway module)
- > E65 and E66 from 03/2004 to 03/2005: Buses and control units
To support the workshops, the original version of the bus structures on the E65 and E66 is also available:
In the original version, the E65, E66 had the two control units SIM and ZGM.
- SIM: safety and information module
The SIM was the data interface for the control units on the byteflight data bus.
- ZGM: Central gateway module
The ZGM is the central data interface for all buses and control units.
- > E65 and E66 up to 03/2004: Buses and control units
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.