Airbag control unit with part number 98820-9BF0A

What does the airbag control unit 98820-9BF0A do?

The airbag control unit 98820-9BF0A is the SRS control unit of Nissan. It receives the measurements from the impact sensors, calculates within milliseconds in a crash which airbags and seatbelt pretensioners fire, and monitors the system permanently. Fault messages go to the airbag warning light.

In operation the unit continuously checks its surroundings in the vehicle, i.e. sensors, wiring and firing units. This continuous operation is the reason why the control is so closely linked with the sensors.

The unit detects an accident from the signals. It then stores crash data and locks itself, and only the repair lifts this lock.

Why does the control unit 98820-9BF0A fail?

The most common cause is stored crash data after an accident, even if no airbag has deployed. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

The crash data remains in the control unit until it is erased. A normal diagnostic tool does not make it disappear; Airbag24 erases it during the repair.

The other causes can be technical in nature: components age, solder joints can be cold, and moisture attacks plug connections. Voltage spikes, for example from a weak battery or a jump start, can contribute to a failure.

How can you tell that the 98820-9BF0A is defective?

A defect shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Fault messages and a fault memory that cannot be cleared are added to this.

• airbag warning light permanently or intermittently on
• fault message in the instrument cluster
• no connection between diagnostic tool and control unit
• fault memory cannot be cleared

While such a fault exists, airbags and seatbelt pretensioners may not deploy in an emergency. The light is the signal you should watch first.

Which vehicles is the 98820-9BF0A fitted in?

The airbag control unit 98820-9BF0A is fitted in these vehicles: Nissan Frontier D40 (2005-2007) and D40 Facelift (2007-2015).

The list shows the vehicles that appear in the data for this part number.

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

First check whether the part number on the label of your removed unit matches this page. That only establishes that it is the correct unit. Also have the fault memory read out beforehand, because only this result 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 98820 EB01D.

How does the repair of the 98820-9BF0A work?

Have the fault memory read out and enclose the log with the unit, then disconnect the battery and only then remove the control unit. Next, create a repair order online and pack the unit well. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit goes onto the test bench. Defective components are replaced, stored crash data is erased and a function test is finally run. Your own unit then 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 98820-9BF0A get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 sends it back to you by UPS after the repair.

Insert the printed repair order into the parcel and pad the unit so that it is shock-proof.