Airbag control unit with part number 28556-ZP61A

What does the airbag control unit 28556-ZP61A do?

As the central element, the airbag control unit 28556-ZP61A controls the restraint system (SRS) of Nissan. It checks the signals from the crash sensors and determines in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

While driving, the unit monitors the components of the system without interruption. If it detects a fault, it shows this via the airbag warning light in the instrument cluster.

After an accident the control unit stores crash data and locks itself. The storage takes place regardless of whether an airbag actually deployed.

Why does the control unit 28556-ZP61A fail?

Stored crash data is the most common cause, even if no airbag has deployed; a standard diagnostic tool cannot clear it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data stays in the control unit until it is erased during the repair. No airbag needs to have deployed in the accident for this.

Aged electronic components and cold solder joints lead to changing faults over time. Moisture and corrosion attack the contacts at plug connections.

Voltage spikes, for example from a weak battery or a jump-start, can damage the electronics.

How can you tell that the 28556-ZP61A is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool cannot reach the control unit, or the fault memory cannot be cleared. In such cases airbags and seatbelt pretensioners may possibly fail to deploy in an emergency.

The warning light is the vehicle's direct indication of a fault in the restraint system. It shows the fault as soon as the control unit registers it.

If the warning light does not go out after starting, have the fault memory checked. This will clarify which fault is present.

Which vehicles is the 28556-ZP61A fitted in?

The 28556-ZP61A is fitted in these vehicles: Nissan Xterra N50 (2005-2008) and N50 Facelift (2008-2015); Nissan Pathfinder R51 1st Facelift (2007-2010), R51 (2004-2007) and R51 2nd Facelift (2010-2013).

For this part number we have the following vehicles on record:

• Nissan Xterra N50 (2005-2008)
• Nissan Xterra N50 Facelift (2008-2015)
• Nissan Pathfinder R51 1st Facelift (2007-2010)
• Nissan Pathfinder R51 (2004-2007)
• Nissan Pathfinder R51 2nd Facelift (2010-2013)

Before sending it in, two checks are worthwhile. Compare the part number on the label of the removed unit with this page; this only ensures that it is the right unit. Also have the fault memory read out beforehand, because only that 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 0285001781 Bosch, 28556-9CA0A, 28556-9CG0A, 28556-9CK0A, 28556-EC00B, 28556ZP21A.

How does the repair of the 28556-ZP61A work?

For the 28556-ZP61A, first have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Afterwards create a repair order online and send the unit in well packed.

Airbag24 examines the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Processing 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-ZP61A get to Airbag24?

You send the control unit 28556-ZP61A as a parcel, or you book a UPS collection for an extra charge. After the repair Airbag24 sends it back to you by UPS.

Place the printed repair order in the parcel and pack the control unit shockproof before you send it.