Airbag control unit with part number 28556-4JF0A

What does the airbag control unit 28556-4JF0A do?

The airbag control unit 28556-4JF0A is the central control unit of the restraint system (SRS) for Nissan. It evaluates the crash sensors, decides in an accident within fractions of a second on airbags and seatbelt pretensioners, and monitors the system continuously.

It stores faults and shows them via the airbag warning light in the instrument cluster. After an accident it stores crash data and locks itself. Only the repair lifts this lock.

Why does the control unit 28556-4JF0A fail?

The most common cause is crash data from an accident that stays in the unit, even if no airbag has deployed. Further causes are summarised in the list below.

A normal diagnostic tool does not erase crash data. Airbag24 removes it during the repair.

• Aged electronic components.
• Cold solder joints.
• Moisture and corrosion on plug connections.
• Voltage spikes, for example from a weak battery or a jump start.

How can you tell that the 28556-4JF0A is defective?

The airbag warning light in the instrument cluster is the most important sign: at the 28556-4JF0A it lights up permanently or intermittently. In addition there are fault messages in the instrument cluster, a missing connection to the diagnostic tool, and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then possibly not deploy. The warning light reports the defect as soon as it occurs and therefore deserves prompt attention.

Which vehicles is the 28556-4JF0A fitted in?

The control unit 28556-4JF0A is fitted in these vehicles: Nissan Navara D40 (2005-2007) and D40 Facelift (2007-2015).

The following vehicles are known to us for this part number.

• Nissan Navara D40 (2005-2007)
• Nissan Navara D40 Facelift (2007-2015)

Compare the part number on the label of the removed unit with this page. This only confirms that you have the correct unit.

Have the fault memory read out in advance. 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 285001734, 28556 4X00A, 28556EA100, 98820 5X20B, 98820 EB01C, 98820 EB01D.

How does the repair of the 28556-4JF0A work?

You read out the fault memory first and enclose the log. Then disconnect the battery and only afterwards remove the 28556-4JF0A. Create a repair order online and send the unit in, well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. Then your own unit goes back 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 28556-4JF0A get to Airbag24?

You send the control unit 28556-4JF0A as a parcel or book a UPS collection for an extra charge. After the repair the unit comes back to you by UPS.

Enclose the printed repair order in the parcel and pack the unit shock-resistant.