Airbag control unit with part number 28556 8H500

What does the airbag control unit 28556 8H500 do?

In the restraint system (SRS) of Nissan, the airbag control unit 28556 8H500 performs the evaluation. Based on the crash sensors, it determines which airbags and seatbelt pretensioners are triggered in an accident.

While driving, it monitors the components of the system continuously. If it detects a fault, it shows this via the airbag warning light.

After an accident it creates crash data and then locks itself.

Why does the control unit 28556 8H500 fail?

Stored crash data from an accident is the most common cause on the 28556 8H500, even if no airbag has triggered. Other causes include aged components, cold solder joints, moisture and corrosion, as well as voltage spikes.

A standard diagnostic tool cannot remove crash data. Airbag24 deletes it specifically during the repair.

How can you tell that the 28556 8H500 is defective?

The airbag warning light on the 28556 8H500 sometimes stays on permanently and sometimes only intermittently, and an error message appears in the instrument cluster. In addition there is no connection to the diagnostic tool, and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The warning light is a direct signal from the control unit itself and cannot be ignored.

Which vehicles is the 28556 8H500 fitted in?

The 28556 8H500 is fitted in these vehicles: Nissan X-Trail T30 (2001-2003) and T30 Facelift (2003-2007).

You will find the assigned vehicles here:

• Nissan X-Trail T30 (2001-2003)
• Nissan X-Trail T30 Facelift (2003-2007)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Whether the control unit itself is defective or a connector or cable is the cause is shown only by the fault memory. Therefore have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 41650EQ070, 988208H40C, 98820JH43A, A68-000U06.

How does the repair of the 28556 8H500 work?

Processing at Airbag24 usually takes 3–4 working days. For the repair of the 28556 8H500, first have the fault memory read out and attach the log, then disconnect the battery and only then remove the unit. Afterwards, create the repair order online and send the unit in well packed.

Airbag24 checks the control unit on the test bench, replaces defective components, deletes the 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 8H500 get to Airbag24?

You send the 28556 8H500 to Airbag24 as a package or book a UPS collection for an extra charge. Airbag24 sends the unit back to you by UPS after the repair.

Pack the printed repair order into the package and use shock-proof packaging for the unit.