Airbag control unit with part number 98820-9BF0B

What does the airbag control unit 98820-9BF0B do?

The SRS control unit 98820-9BF0B forms the central control of the restraint system for Nissan. It processes the signals from the crash sensors, selects the appropriate airbags and seatbelt pretensioners within milliseconds in a crash, and monitors the system continuously. Faults are shown via the airbag warning light.

Under normal conditions the warning light stays off while the unit quietly compares the values in the background. If something deviates, it records an entry in the fault memory.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 98820-9BF0B fail?

The most common cause is crash data that remains in the unit after an accident, even if no airbag was deployed. A normal diagnostic tool cannot erase this data. Other technical causes are also possible.

The further causes include in particular:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 98820-9BF0B is defective?

A defect is indicated by the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and by an error message in the instrument cluster. Even if the diagnostic tool gets no contact with the control unit, or the fault memory cannot be cleared, a problem is likely. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

Typical signs are:

• warning light on permanently
• warning light on intermittently
• error message in the instrument cluster
• no connection to the diagnostic tool
• fault memory cannot be cleared

If you see the light, have the restraint system checked promptly. Do not rely on the problem resolving itself.

Which vehicles is the 98820-9BF0B fitted in?

The control unit 98820-9BF0B is fitted in these vehicles: Nissan Frontier D40 (2005-2007) and D40 Facelift (2007-2015). The list that follows makes it easier to compare with your own vehicle.

The vehicles we have on record for this part number are listed below.

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

On the one hand, it is worth comparing the part number on the label of the removed unit with this page, which only confirms that the unit is correct. On the other hand, have the fault memory read out beforehand. Only this log shows whether the control unit is defective or whether a plug or cable is behind it.

For the same vehicles, we also repair control units with the part numbers 98820 EB01D.

How does the repair of the 98820-9BF0B work?

You have the fault memory read out, attach the log, and then disconnect the battery before the control unit is removed. Then create a repair order online and send in the unit well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 first places the unit on the test bench. Defective components are then repaired, crash data erased and a function test carried out. You then receive your own unit back.

The steps before removal must be observed for safety reasons.

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 98820-9BF0B get to Airbag24?

A parcel brings the unit to Airbag24; alternatively, UPS collects it for an extra charge. The return after repair is likewise handled by UPS.

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