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.
12 36 516 Removing and installing/replacing range extender electrical machine electronics (REME) (i3 base, i3s)
Compliance with the following points is mandatory before beginning work:
- De-energize the HIGH-VOLTAGE SYSTEM .
- Observe SAFETY INSTRUCTIONS for working with electric vehicles.
- Observe NOTES ON EARTH BONDING SCREW CONNECTIONS .
Preliminary work needed:
- Refer to Remove VERTICAL STRUT .
- Refer to Remove REAR CROSS STRUT .
- Refer to DRAINING COOLANT .
REMOVAL:
Release screws (1) from heat shield (2).
Feed out heat shield (2) and remove.
Unlock and disconnect high-voltage safety connector (1).
Release screws (2) and disconnect high-voltage plug connection (3).
Unlocking and disconnect signal connector (4).
Detach high-voltage cables from clamps (5).
Unlock and disconnect connector (6) from high-voltage cable.
Release screw (1) from potential equalization line (2).
Unfasten and detach the coolant hoses (3).
Unscrew the screws (1).
Slacken nut (2).
Feed out range extender electrical machine electronics (3).
INSTALLATION:
Feed in range extender electrical machine electronics (3).
Tighten screws (1) and nuts (2).
Tightening torque 12 36 8AZ .
Connect and lock coolant hoses (3).
Tighten potential equalization line (2) with screw (1).
Tightening torque 12 36 9AZ .
Connect connector (6) of high-voltage cable and lock.
Attach high-voltage cables to holder (5).
Connect and lock connector (4) of signal line.
Connect connector (3) of high-voltage cable to range extender electrical machine electronics and tighten screws (2).
Tightening torque 12 36 10AZ .
Connect and lock high-voltage safety connector (1).
Feed in heat shield (2).
Tighten down screws (1).
Tightening torque 12 36 11AZ .
Required reworking:
- Install VERTICAL STRUT .
- Remove REAR CROSS STRUT .
- FILLING AND VENTING COOLING SYSTEM .
Replacement:
Carry out VEHICLE PROGRAMMING/CODING .
NO RELATED
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.