Airbag control unit with part number 38910-57L80

What does the airbag control unit 38910-57L80 do?

The airbag control unit 38910-57L80 forms the central control of the restraint system (SRS) of Suzuki. It evaluates the crash sensors, determines in a collision within fractions of a second which airbags and seatbelt pretensioners are triggered, and monitors the entire system. Faults are indicated by the airbag warning light.

The control unit has its own evaluation logic, which responds to the signals from the sensors. This decision has to be made so quickly that the airbags can open in time.

After an accident it stores crash data and locks itself. The lock remains in place until a repair lifts it.

Why does the control unit 38910-57L80 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed, and a normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, such as from a weak battery or a jump start.

Crash data is created by an impact that the unit registers. It is stored even if the airbag was not triggered, and it remains in the unit until the repair removes it.

The other causes concern the electronics themselves. Over time components age, solder joints on the circuit board can go cold, and moisture or corrosion at the plug connections impair the transmission of signals.

Voltage spikes in the vehicle electrics, for example from a weak battery or a jump start, also stress the components.

How can you tell that the 38910-57L80 is defective?

Signs are an airbag warning light in the instrument cluster that stays on permanently or intermittently, an error message in the instrument cluster, a diagnostic tool that cannot connect to the control unit, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

You can see these signs directly in the vehicle:

• Airbag warning light stays on permanently
• Airbag warning light stays on only intermittently
• Error message in the instrument cluster
• Diagnostic tool has no connection to the control unit
• Fault memory cannot be cleared

If any of these signs occur, have the system checked promptly.

Which vehicles is the 38910-57L80 fitted in?

The airbag control unit 38910-57L80 is fitted in these vehicles: Suzuki Kizashi RE91S.

The vehicles in which this part number occurs are listed here:

• Suzuki Kizashi RE91S

Compare the part number on the label with this page; this only establishes that it is the right unit. Whether the control unit is defective or a plug or cable causes the problem is only shown by the fault memory, which you should have read out beforehand.

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

How does the repair of the 38910-57L80 work?

First the fault memory is read out and the log is attached. Then disconnect the battery and remove the control unit. Afterwards create a repair order online and pack the unit well before sending it in. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24, the unit is checked on the test bench. Defective components are repaired, stored crash data is erased, and a function test is carried out. Afterwards the unit goes back to you.

The order serves safety: only after the battery has been disconnected may the control unit be removed.

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 38910-57L80 get to Airbag24?

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

Pack the printed repair order with the unit and pack the control unit shock-proof.