Airbag control unit with part number 5723100-TB02

What does the airbag control unit 5723100-TB02 do?

The airbag control unit 5723100-TB02 controls the restraint system (SRS) of Leapmotor. It reads the crash sensors, determines within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit stores detected faults and reports them via the airbag warning light. The evaluation takes place entirely inside the unit, because the time until triggering is very short.

After an accident, the control unit stores crash data and locks itself. This finding is the first step of every repair examination.

Why does the control unit 5723100-TB02 fail?

The most common cause on the 5723100-TB02 is crash data stored after an accident, even if no airbag was triggered. Further causes can be summarised briefly:

• aged electronic components that lose performance over time
• cold solder joints inside the unit
• moisture and corrosion at plug connectors
• voltage spikes, for example from a weak battery or a jump start

Crash data remain stored in the unit. A standard diagnostic tool cannot remove them, so the fault persists after reading out.

How can you tell that the 5723100-TB02 is defective?

A defect on the 5723100-TB02 shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently, as a fault message in the instrument cluster, as a missing connection of the diagnostic tool to the control unit and as a fault memory that cannot be cleared.

The warning light is the most important signal and indicates the fault as soon as the control unit detects it. You should therefore not ignore it. In an emergency, airbags and seatbelt pretensioners may fail to trigger while the fault persists. Have the system checked promptly.

Which vehicles is the 5723100-TB02 fitted in?

The 5723100-TB02 is fitted in these vehicles: Leapmotor T03 (from 2024).

The list of assigned models follows below.

• Leapmotor T03 (from 2024)

On the one hand, compare the part number on the label of the removed unit with this page, so that you have the right unit. On the other hand, have the fault memory read out beforehand. Only this result shows whether the control unit itself is the cause or whether a plug or cable causes the fault.

How does the repair of the 5723100-TB02 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit. Afterwards create a repair order online and send the unit in well packed. At Airbag24, processing usually takes 3–4 working days.

The sequence must be observed for safety reasons.

Airbag24 checks the unit on the test bench, replaces defective components, deletes the stored crash data and carries out a functional test. Afterwards your unit goes back to you.

Our repairs come with 2 years' statutory liability for defects.

The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 5723100-TB02 get to Airbag24?

You send the 5723100-TB02 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Put the printed repair order in the parcel and pack the unit shock-proof.