Airbag control unit with part number 38910-57LC0

What does the airbag control unit 38910-57LC0 do?

The airbag control unit 38910-57LC0 controls the SRS restraint system of Suzuki. From the crash sensor signals it determines within milliseconds in a collision which airbags and seatbelt pretensioners must be triggered.

During normal operation the unit checks the system constantly. If a fault is detected, the airbag warning light in the instrument cluster shows it, so that no one overlooks the fault.

After an accident, the control unit stores crash data and locks itself. The lock applies to the control unit itself and not merely to the display.

Why does the control unit 38910-57LC0 fail?

Most often the cause lies in crash data stored after an accident, even if no airbag has deployed. Other causes include ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. It therefore remains in place even when the vehicle seems normal again after the accident.

The other causes relate to ageing and environmental influences. Electronic components wear over time, solder joints can go cold, and moisture and corrosion attack the contacts. Voltage spikes, for example from a weak battery or a jump start, act as an additional trigger.

How can you tell that the 38910-57LC0 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition, an error message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be erased.

In this state, airbags and seatbelt pretensioners may not trigger in an emergency. The light reports exactly that, which is why you should not ignore it.

A missing connection to the diagnostic tool points to a fault in the control unit or its power supply. The precise cause only becomes clear when the fault memory is read out.

Which vehicles is the 38910-57LC0 fitted in?

For Suzuki, the control unit 38910-57LC0 is listed as the correct unit. It is fitted in these vehicles: Suzuki Kizashi RE91S.

The list below shows the vehicles for which this part number is recorded.

• Suzuki Kizashi RE91S

First check whether the part number on the label of the removed unit matches this page. This only establishes that it is the right unit. Then have the fault memory read out, because only this log shows whether the control unit itself or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 38910-57L00, 395057L105, 4815057L01.

How does the repair of the 38910-57LC0 work?

Have the fault memory read out first and enclose the log. Then disconnect the battery and only then remove the control unit 38910-57LC0. Then create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, replaces defective components selectively, erases the stored crash data and carries out a function test. Afterwards your unit goes back to you. Processing at Airbag24 usually takes 3–4 working days, and this period covers only testing, repairing and checking.

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 38910-57LC0 get to Airbag24?

You send the control unit 38910-57LC0 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Place the printed repair order in the parcel and pack the unit shockproof. This keeps the unit from being damaged in transit.