Airbag control unit with part number 98820-9BU8A

What does the airbag control unit 98820-9BU8A do?

The airbag control unit 98820-9BU8A is the central control unit of the restraint system (SRS) in Nissan vehicles. It evaluates the signals from the crash sensors and, in an emergency, decides within milliseconds which airbags and seatbelt pretensioners are triggered. After a crash, it locks itself.

The unit does not only work in the event of a crash. As long as the ignition is switched on, it continuously monitors the entire system and reports faults via the airbag warning light in the instrument cluster.

Why does the control unit 98820-9BU8A fail?

The most common cause for the 98820-9BU8A is crash data stored 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.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 removes it in a targeted way during the repair. Voltage spikes occur, for example, with a weak battery or when jump-starting, and cold solder joints or moisture on the plugs can also disturb the unit over time.

How can you tell that the 98820-9BU8A is defective?

A defect in the 98820-9BU8A shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently. Error messages, a missing connection to the diagnostic tool or a fault memory that cannot be cleared may also occur.

Typical signs are:

• The airbag warning light is on permanently or intermittently.
• An error message appears in the instrument cluster.
• The diagnostic tool finds no connection to the control unit.
• The fault memory cannot be cleared.

With such a defect, airbags and seatbelt pretensioners may not trigger in an emergency. Therefore, have the cause clarified promptly.

Which vehicles is the 98820-9BU8A fitted in?

The control unit 98820-9BU8A is fitted in these vehicles: Nissan Frontier D41 (from 2021).

The vehicles in detail:

• Nissan Frontier D41 (from 2021)

Compare the number on the label of the removed unit with this page. This only confirms that it is the correct unit. Also have the fault memory read out, because only this result shows whether the control unit itself is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 98820-9BU8D, 98820-9BU8E, 98820-9BU9B.

How does the repair of the 98820-9BU8A work?

For the repair of the 98820-9BU8A, first have the fault memory read out and attach the log before you disconnect the battery and remove the control unit. Airbag24 generally needs 3–4 working days for checking, repairing and testing.

Then create a repair order online and pack the unit well before sending it in. Airbag24 checks it on the test bench, replaces defective components, erases stored crash data and carries out a function test. Afterwards, your own unit is returned to you.

This time refers solely to the work at Airbag24.

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 98820-9BU8A get to Airbag24?

You send the control unit 98820-9BU8A in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.