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.
2021 BMW i3 Range ExtenderFACTORY OEM SERVICE PROCEDURE
Electrical Systems: TENSIONERS
| Condition | Code | Procedure |
|---|---|---|
| Alignment incorrect | B | Require repair or replacement |
| Attaching hardware broken | A | Require repair or replacement of hardware |
| Attaching hardware missing | C | Require replacement of hardware |
| Attaching hardware not functioning | A | Require repair or replacement of hardware |
| Bearings worn | 1 | Suggest replacement |
| Belt tension incorrect | B | Require adjustment or repair |
| Cracked | B | Suggest replacement |
| Missing | C | Require replacement |
| Noisy | 2 | Suggest replacement |
| Pulley damaged, affecting belt life | A | Require replacement |
| Seized | A | Require repair or replacement |
Factory Service Tools
Use the Manual With the Right Hardware
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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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