Airbag control unit with part number 28556-5RB0C

What does the airbag control unit 28556-5RB0C do?

The airbag control unit 28556-5RB0C controls the restraint system (SRS) of Nissan. It reads the crash sensors, decides in an accident within a few milliseconds on airbags and seatbelt pretensioners, and monitors the system permanently. After an accident it stores crash data and locks itself.

The control unit is therefore both evaluator and decision-maker. Faults it detects are recorded in the memory and reported via the airbag warning light.

Why does the control unit 28556-5RB0C fail?

With the 28556-5RB0C, the most common cause is stored crash data from an accident, which a normal diagnostic tool cannot delete. Aged components, moisture at plug connectors, cold solder joints and voltage spikes come into consideration as well.

Crash data is also stored when no airbag has triggered. The unit therefore stores more than can be seen from outside, and precisely this makes fault finding on this control unit harder.

The other causes concern the electronics and their connections. Aged components, corrosion at plugs and voltage spikes, for example from a weak battery, can likewise put a control unit out of operation. Which cause is present only the inspection shows.

How can you tell that the 28556-5RB0C is defective?

A defect in the 28556-5RB0C shows first at the airbag warning light in the instrument cluster, which stays on permanently or intermittently. A fault message also appears, and the diagnostic tool gets no connection to the control unit. In an emergency, airbags and seatbelt pretensioners may then not trigger.

A fault memory that cannot be cleared is also among the typical findings. The warning light is therefore a clear indication of a fault in the restraint system.

Which vehicles is the 28556-5RB0C fitted in?

The control unit 28556-5RB0C is found in these vehicles: Nissan Kicks P15 (2016-2020) and P15 Facelift (2020-2024).

An overview by part number looks like this:

• Nissan Kicks P15 (2016-2020)
• Nissan Kicks P15 Facelift (2020-2024)

Comparing the part number on the label of the removed unit with this page ensures that you have the correct unit in front of you. Whether the control unit itself is defective, or whether a connector or cable is the cause, only the fault memory shows. Therefore have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 98820-5RX0B.

How does the repair of the 28556-5RB0C work?

First the fault memory of the 28556-5RB0C is read out; the log then goes into the parcel. Afterwards you disconnect the battery and remove the control unit before creating a repair order online and sending the unit in. Checking, repairing and testing at Airbag24 normally take 3–4 working days.

This order serves to protect you during removal. Airbag24 then examines the unit on the test bench, repairs defective components, deletes the stored crash data and carries out a function test before 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 28556-5RB0C get to Airbag24?

For shipping, you send the control unit 28556-5RB0C as a parcel or have it collected by UPS for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel. Pack the control unit shock-proof so that it is protected in transit.