Airbag control unit with part number 28556-4JE0A

What does the airbag control unit 28556-4JE0A do?

The airbag control unit 28556-4JE0A controls the restraint system (SRS) in Nissan vehicles. It checks the crash sensors, decides in a fraction of a second in the event of an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit stores faults and shows them via the airbag warning light in the instrument cluster. After an accident it records crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit 28556-4JE0A fail?

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

A normal diagnostic tool cannot erase the crash data. Airbag24 erases it during the repair.

• Ageing electronic components.
• Cold solder joints.
• Moisture and corrosion at plug connections.
• Voltage spikes, for example from a weak battery or jump-starting.

How can you tell that the 28556-4JE0A is defective?

The airbag warning light is the most important sign. It lights up on the 28556-4JE0A permanently or intermittently, accompanied by fault messages in the instrument cluster, a lack of connection to the diagnostic tool and a fault memory that cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. The light reports the fault as soon as it occurs, so a prompt check is advisable.

Which vehicles is the 28556-4JE0A fitted in?

The control unit 28556-4JE0A is fitted in these vehicles: Nissan Navara D40 (2005-2007) and D40 Facelift (2007-2015).

Below you can see the vehicles we have on record 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 it is the correct unit.

Have the fault memory read out in advance. 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 28556-4JE0A work?

First you read out the fault memory and enclose the log. Then you disconnect the battery and only then remove the 28556-4JE0A. Next you create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 tests the unit on the test bench, replaces defective components and erases crash data. A function test follows, and 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 28556-4JE0A get to Airbag24?

You send the control unit 28556-4JE0A as a parcel or book a UPS collection for an extra charge. After the repair it is returned to you by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.