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.
2004 BMW 320i (E46) (CANADA) L6-2.2L M54FACTORY OEM SERVICE PROCEDURE
Back-Up Light Relay (Functional Descriptions)
H SMG Transmission
Functional description see BMW Technology: TIS -> Document >>- SI Technology - SBT Numbers: - for E46: 2301 03 002 - for E85:2302 03 021
Sequential Manual Transmission SMG means that in contrast to conventional manual transmissions the clutch control and gear changes are automated. An electrohydraulic control system handles the functions that are otherwise performed by the driver shifting with the clutch pedal, gear lever and accelerator pedal.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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