Airbag control unit with part number 28556 ZR00B

What does the airbag control unit 28556 ZR00B do?

The airbag control unit 28556 ZR00B is the central control unit in the restraint system (SRS) for Nissan. It checks the crash sensors, decides in a collision within milliseconds on airbags and seatbelt pretensioners, and shows faults via the airbag warning light. After an accident it stores crash data and locks itself.

During operation the unit evaluates the sensor signals continuously. This keeps the system monitored in every driving situation.

Why does the control unit 28556 ZR00B fail?

The most common cause is stored crash data, which a normal diagnostic tool cannot erase. This also applies if no airbag was triggered.

Ageing electronic components, cold solder joints and moisture or corrosion at plug connections are further possible causes. Voltage spikes, for example from a weak battery or a jump start, can also load the electronics.

How can you tell that the 28556 ZR00B is defective?

You can recognise a defect in the 28556 ZR00B by the airbag warning light in the instrument cluster, which stays on permanently or intermittently. Fault messages and a fault memory that cannot be emptied also point to a defect. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

These signs should be taken seriously:

• airbag warning light on permanently or intermittently
• fault message in the instrument cluster
• diagnostic tool cannot reach the control unit
• fault memory cannot be cleared

Reading out the fault memory early brings quick clarity.

Which vehicles is the 28556 ZR00B fitted in?

Comparing the part number 28556 ZR00B with the label shows whether the unit fits. The control unit 28556 ZR00B is fitted in these vehicles: Nissan Titan A60 (2004-2015).

These vehicles are recorded for part number 28556 ZR00B:

• Nissan Titan A60 (2004-2015)

Have the fault memory read out before removal, so that it is clear whether the control unit really is defective. Only then compare the label of the removed unit with 28556 ZR00B.

For the same vehicles, we also repair control units with the part numbers 0 285 014 624, 1520831000, 152083100B, 1520831U00, 1520831U01, 1520831U0A.

How does the repair of the 28556 ZR00B work?

Have the fault memory read out, disconnect the battery and remove the control unit 28556 ZR00B. Then create the repair order online and send the well-packed unit in. Airbag24 checks it, repairs defective components, erases the crash data and tests the function.

For checking, repairing and testing at Airbag24, 3–4 working days are usually scheduled.

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 ZR00B get to Airbag24?

A parcel, or a UPS collection for an extra charge, brings the control unit 28556 ZR00B to Airbag24. The repaired unit then comes back by UPS.

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