Airbag control unit with part number 28556-4BS0A

What does the airbag control unit 28556-4BS0A do?

In the Nissan vehicle, the airbag control unit 28556-4BS0A controls the SRS restraint system. It processes the signals from the crash sensors, decides within fractions of a second on airbags and seatbelt pretensioners in the event of an accident, and checks the system without interruption. If it detects a fault, it reports it to the airbag warning light.

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

Why does the control unit 28556-4BS0A fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed, and a normal diagnostic tool cannot remove it. In addition there are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery or a jump start.

The other causes develop gradually: components age, solder joints can crack, moisture attacks contacts, and voltage spikes stress the electronics.

How can you tell that the 28556-4BS0A is defective?

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

The light shows the defect directly. As long as it is lit, the airbags and seatbelt pretensioners may not deploy in an emergency, so it is important to have it checked promptly.

Which vehicles is the 28556-4BS0A fitted in?

The airbag control unit 28556-4BS0A is fitted in these vehicles: Nissan Rogue T32 (2013-2020).

The following vehicles are listed for this control unit:

• Nissan Rogue T32 (2013-2020)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Have the fault memory read out beforehand, because only the result shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 98820-1VK0A, 98820-1VL0A, 98820-4BS0A, 98820-6RR0C, 98820-6RR0D, 98820-6RR0E.

How does the repair of the 28556-4BS0A work?

At Airbag24, testing, repair and function test usually take 3–4 working days. On your side, the order is fixed: first have the fault memory read out, then disconnect the battery, and only then remove the control unit.

Then create the repair order online and enclose the fault memory log with the securely packed unit.

Airbag24 inspects the unit, replaces defective components, deletes stored crash data and carries out a function test. Afterwards your own unit is returned 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 28556-4BS0A get to Airbag24?

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

The printed repair order goes into the parcel; pack the unit shock-resistant.