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.
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HOMESERVICE MANUALSBMW2021I3 RANGE EXTENDERREPAIR AND DIAGNOSISHYBRID/ELECTRIC POWERTRAINELECTRIC MOTOR SYSTEMSENGINE ELECTRICAL SYSTEM -- REPAIR (I01)
2021 BMW i3 Range Extender
Engine Electrical System -- Repair (I01)
2021 BMW i3 Range ExtenderSECTION Engine Electrical System -- Repair (I01)
- 12 00 Engine Electrical System
- 12 12 Ignition Wire, Spark Plugs
- 12 13 Ignition Coil
- 12 14 Electronic Switching Or Control Units
- 12 14 521 Replacing crankshaft pulse sensor (101) (i3 base, i3s)
- 12 14 523 Replacing pulse sensor on intake camshaft (101) (i3 base, i3s)
- 12 14 600 Replacing knock sensor (101) (i3 base, i3s)
- 12 14 750 Removing and installing/replacing control unit (EDME) (i3 base, i3s)
- 12 14 760 Removing and installing/replacing control unit (RDME) (i3 base, i3s)
- 12 35 Electrical Machines
- 12 35 000 Removing and installing complete drive unit (i3 base, i3s)
- 12 35 000 Removing and installing complete drive unit (range extender) (i3 base, i3s)
- 12 35 000 Removing and installing complete drive unit (i3 base, i3s)
- 12 35 015 Replacing the starter motor generator (vehicles with range extender W20) (i3 base, i3s)
- 12 35 506 Replace electrical machine (i3 base, i3s)
- 12 35 506 Replacing electrical machine (range extender) (i3 base, i3s)
- 12 35 000 Removing and installing complete drive unit (i3s)
- 12 36 Control System, Hybrid/Electric Drive
- Non-woven abrasives (i3 base, i3s)
- 12 36 016 Remove and install range extender electrical machine electronics (REME) (i3 base, i3s)
- 12 36 018 Removing/installing electrical machine electronics (i3 base, i3s)
- 12 36 018 Removing/installing electrical machine electronics (i3 base, i3s)
- 12 36 516 Removing and installing/replacing range extender electrical machine electronics (REME) (i3 base, i3s)
- 12 36 517 Replacing range extender electrical machine electronics (REME) (i3 base, i3s)
- 12 36 610 Replace electrical machine electronics (i3 base, i3s)
- 12 36 610 Replace electrical machine electronics (after vehicle diagnosis) (i3 base, i3s)
- 12 36 018 Removing/installing electrical machine electronics ) (i3s)
- 12 51 Engine Wiring Harness
- 12 51 040 Removing and installing/replacing wiring harness section for range extender electrical machine electronics (REME) (i3 base, i3s)
- 12 51 045 Removing and installing/replacing wiring harness section of the sensor system module electrical machine electronics (EME) (101) (i3 base, i3s)
- 12 51 235 Removing and installing/replacing engine sensor system module 1 wiring harness (101) (i3 base, i3s)
- 12 51 240 Removing and installing/replacing engine sensor system module 2 wiring harness (101) (i3 base, i3s)
- 12 61 Oil Pressure, Oil Temp, Oil Level Check
- 12 63 Switch And Relay
RENDER: 1.0x
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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.