Tesla BMS_f107, BMS_w107  How to Fix

Tesla "BMS_w107" Guide to Fix it (BMS_f107_SW_Cell_Voltage_Sensor)

1. Introduction

This is common issue for Model S. In case, if you are living in city where it rains so often or salt roads, humidity in the region.

1.1 What could be the reasons

There could be issue with Bad Cell.

What is Cell?

Action to Do

Car need to to diagnosis and if needed high voltage need to open, inspect and repair.

2. How to Fix

2.1 Loose Voltage Sensor Wire

One of reason could be that voltage sensor wire became loose.

2.2 Broken cell sensors

2.3 Bad Cell

2.4 Broken seals

2.5 Corrosion on Electronic Components

One of reason could be corroded electronic components

2.6 Capacitors

One of reasons could be that capacitors are going bad.

3. Tips

If you remove the HV Battery pack to fix the issue. It is recommended to remove every module and carefully inspect other BMBs and sensor connections. This process will take time and will cost you. However, if you do not do. There could be the pack will fail again the same way when other BMBs die. 

Cost

Cost could vary depend on issue, type of workshop, location. If you are looking for online support or affordable independent workshop. Please free to contact us or have a look in Price List

Alert Code

Possible alert code

  • BMS_w107
  • BMS_w107_SW_Cell_Voltage_Sensor
  • BMS_f107
  • BMS_f107_SW_Cell_Voltage_Sensor
Tesla BMS_f107, BMS_w107 How to Fix it

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Disclaimer: Tesla, Inc. was not involved in the creation of this document. Tesla did not provide us any info. Tesla did not edit, review or authorize us. We gather this information from Tesla official website and other resources.

Note: It is your responsibility to double check and confirm that the procedures/info mentioned in this blog are applicable to your specific car before performing them. Please contact us or our workshop partner to make sure/confirm. We will be happy to help you.