Airbag control unit with part number 28556 6F605

What does the airbag control unit 28556 6F605 do?

The airbag control unit 28556 6F605 is the central control unit of the restraint system (SRS) of Nissan. It evaluates the signals from the crash sensors and decides within milliseconds whether airbags and seatbelt pretensioners are triggered.

The unit monitors the system continuously and reports faults via the airbag warning light.

After an accident it stores crash data and locks itself. This is one of the characteristics you should know about this unit.

Why does the control unit 28556 6F605 fail?

Stored crash data after an accident are the most common cause, even if no airbag was deployed. A normal diagnostic tool cannot erase them. Other causes are ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data stay in the memory even after the fault memory has been read out. They therefore always play a role when looking for the cause.

The other causes develop over a longer period. Electronics age, solder joints can stay cold, and moisture attacks the contacts.

How can you tell that the 28556 6F605 is defective?

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

The signs at a glance:

• airbag warning light stays on permanently or intermittently
• error message in the instrument cluster
• no connection between diagnostic tool and control unit
• fault memory cannot be cleared

Which vehicles is the 28556 6F605 fitted in?

The 28556 6F605 is fitted in these vehicles: Nissan Micra K11 (1992-1998), K11 1st Facelift (1998-2000) and K11 2nd Facelift (2000-2003).

You will find the vehicles on file in this list.

• Nissan Micra K11 (1992-1998)
• Nissan Micra K11 1st Facelift (1998-2000)
• Nissan Micra K11 2nd Facelift (2000-2003)

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

For the same vehicles, we also repair control units with the part numbers 285001183, 285001411, 28556 6F707, 28556AP002, 407933-0752, 9858445B03.

How does the repair of the 28556 6F605 work?

First you have the fault memory read out and enclose the log. Then you disconnect the battery and only then remove the control unit. Next, you create a repair order online and send in the well-packed unit.

Airbag24 examines the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Your own unit is then sent back to you.

Processing at Airbag24 usually takes 3–4 working days. 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 6F605 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the control unit 28556 6F605 by UPS.

Put the printed repair order into the parcel and pack the control unit shock-proof.