Airbag control unit with part number 38910-57R00

What does the airbag control unit 38910-57R00 do?

The airbag control unit 38910-57R00 is the central control unit of the restraint system for Suzuki. It evaluates the crash sensors, selects the appropriate airbags and seatbelt pretensioners in an accident, and monitors the state of the system continuously. If it detects a fault, the airbag warning light comes on.

Triggering has to happen within milliseconds, so the evaluation runs without interruption. In a crash, each decision has only a very short time available.

After an accident, it stores crash data and locks itself. Only the repair lifts the lock.

Why does the control unit 38910-57R00 fail?

The most common cause is crash data stored after an accident, even without airbag deployment; an ordinary diagnostic tool cannot remove it. Ageing electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes also play a role.

Crash data comes from an event that may have seemed harmless on the vehicle from the outside. The unit stores it anyway and keeps it until the repair removes it.

The other causes concern the surroundings of the control unit: components age, connections are disturbed by moisture or corrosion, and solder joints can go cold.

Voltage spikes arise, for example, when the battery is weakening or jump-starting is not done properly. A failure of the control unit therefore does not necessarily lie with the unit itself.

How can you tell that the 38910-57R00 is defective?

Typical signs are an airbag warning light that lights up permanently or intermittently, a fault message in the instrument cluster, a missing connection to the diagnostic tool, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool does not find the control unit
• Fault memory cannot be cleared

These signs call for a prompt check, because the restraint system is affected.

Which vehicles is the 38910-57R00 fitted in?

The control unit 38910-57R00 is fitted in these vehicles: Suzuki Swift RZ/AZ (2017-2020) and RZ/AZ Facelift (2020-2024).

The known vehicles for this part number are listed below.

• Suzuki Swift RZ/AZ (2017-2020)
• Suzuki Swift RZ/AZ Facelift (2020-2024)

Comparing the part number on the label with this page only confirms that the right unit is at hand. Reading out the fault memory before removal, however, brings clarity, because only the log shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 38910-62J12-000, 38SC001R9RH.

How does the repair of the 38910-57R00 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit 38910-57R00, and create a repair order online. Airbag24 checks the packed unit, replaces defective components, erases the crash data and tests the function; this usually takes 3–4 working days at Airbag24.

After that, your own unit goes back to you. The processing time refers only to the work at Airbag24.

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 38910-57R00 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the control unit by UPS.

The printed repair order goes into the parcel; the unit should be packed shockproof.