Airbag control unit with part number 38910-58M20

What does the airbag control unit 38910-58M20 do?

The airbag control unit 38910-58M20 controls the restraint systems (SRS) of Suzuki vehicles. It receives the messages from the crash sensors, decides in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system constantly. It shows detected faults via the airbag warning light.

Triggering must happen in time, so the evaluation runs without interruption. The unit checks the measured values against stored limit values and reacts as soon as these are exceeded.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit 38910-58M20 fail?

The most common cause is stored crash data, even if no airbag has deployed, and a normal diagnostic tool does not erase it. Ageing electronics, cold solder joints, moisture at plug connections and voltage spikes are also possible causes.

Crash data remains in the unit after an accident, even if no airbag has deployed. It is precisely this data that causes the fault to persist.

The other causes also affect the electronics or their connections. Components age over time, solder joints can go cold, and moisture or corrosion at plug connections disturbs the signals. Voltage spikes occur, for example, with a weak battery or when jump-starting.

How can you tell that the 38910-58M20 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears in the instrument cluster. In addition, no connection is established between the diagnostic tool and the control unit, and the fault memory remains.

The warning light is the first thing to check in any fault diagnosis, because it shows the state of the system directly. If it comes on, it is a clear sign that something is wrong in the restraint system. In an emergency, airbags and seatbelt pretensioners may not be able to trigger, so a prompt check is advisable.

Which vehicles is the 38910-58M20 fitted in?

The assignment applies to Suzuki. The control unit 38910-58M20 is fitted in these vehicles: Suzuki Swift FZ/NZ (2010-2013) and FZ/NZ Facelift (2013-2017).

The following vehicles are assigned to this unit:

• Suzuki Swift FZ/NZ (2010-2013)
• Suzuki Swift FZ/NZ Facelift (2013-2017)

Compare the part number on the label of the removed unit with this page; this only confirms that you have the correct unit. Have the fault memory read out beforehand, because only this log shows whether the control unit is defective or whether plugs or cables are causing the fault.

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

How does the repair of the 38910-58M20 work?

The order is: read out the fault memory and enclose the log, disconnect the battery, remove the control unit. Then create a repair order online and send the unit in, well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench. Defective components are replaced, stored crash data is deleted and a functional test is carried out before your own unit is sent back.

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 38910-58M20 get to Airbag24?

You send the unit as a parcel or book UPS collection for an extra charge. The return after repair is also made by UPS.

Enclose the printed repair order with the parcel, and the unit must be packed shock-resistant.