Airbag control unit with part number 98820-9BE0A

What does the airbag control unit 98820-9BE0A do?

The airbag control unit 98820-9BE0A forms the control centre of the restraint system (SRS) in Nissan vehicles. It reads the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners to trigger, and keeps the entire system under control.

If it detects a fault, it stores it in the fault memory and shows it via the airbag warning light in the instrument cluster. This monitoring runs throughout every journey.

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

Why does the control unit 98820-9BE0A fail?

Crash data from an accident that remains in the unit even without a deployed airbag is the most common cause; a normal diagnostic tool cannot erase it. Other possible causes are aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Electronics cannot withstand unlimited stress; over the years components can deteriorate.

Moisture and corrosion in plug connections create intermittent contacts. Cold solder joints do the same.

Voltage spikes, for example from a weak battery or a jump start, put additional strain on the unit.

How can you tell that the 98820-9BE0A is defective?

A defect shows up as an airbag warning light that lights up constantly or intermittently, as a fault message in the instrument cluster, as a diagnostic tool with no connection to the control unit, or as a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light is the most important sign the system gives you. It shows that something is wrong, but not what is affected.

Only a readout makes the fault memory visible. It decides whether the control unit itself is affected or whether another component is causing the fault.

Which vehicles is the 98820-9BE0A fitted in?

There is an assignment for this number. The control unit 98820-9BE0A is fitted in these vehicles: Nissan Frontier D40 (2005-2007) and D40 Facelift (2007-2015).

The assignment looks as follows:

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

The comparison against the label on the removed unit confirms that it is the right unit. It does not clarify the cause, however. The fault memory, which you have read out beforehand, remains indispensable, because it shows whether the control unit is defective or whether a plug or a cable is causing the problem.

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

How does the repair of the 98820-9BE0A work?

You first have the fault memory read out and enclose the log; only then do you disconnect the battery and remove the control unit. Then you create a repair order online and send the well-packed unit in. Airbag24 checks it, replaces defective components, erases stored crash data and carries out a function test before your own unit goes back.

The order of steps is for safety. Without a prior readout and with the battery connected, the removal must not start.

Airbag24 usually needs 3–4 working days. This covers only the check, repair and test in-house.

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 98820-9BE0A get to Airbag24?

Either you pack the unit yourself as a parcel, or you book a UPS collection for an extra charge. The return after the repair is likewise made by UPS.

Put the printed repair order in the parcel, and pack the unit in a shock-resistant box.