Airbag control unit with part number 98820-6CB1B

What does the airbag control unit 98820-6CB1B do?

The airbag control unit 98820-6CB1B is the central control unit of the SRS restraint system in Nissan. It analyses the signals from the impact sensors and decides in a crash, within milliseconds, whether the airbags and seatbelt pretensioners are triggered.

It checks the system continuously, and faults appear via the airbag warning light in the instrument cluster. After an accident it stores crash data and locks itself.

These tasks run in the background, which is why faults may only come to attention through the warning light.

Why does the control unit 98820-6CB1B fail?

Stored crash data can cause failure in the 98820-6CB1B, because it arises after an accident even when no airbag has deployed. A normal diagnostic tool cannot remove it.

Ageing electronic components, dry solder joints, and moisture and corrosion at plug connections are also possible causes. Voltage spikes, for example from a weak battery or after a jump start, also stress the unit.

During the repair, Airbag24 erases the crash data and checks the other components on the test bench.

How can you tell that the 98820-6CB1B is defective?

A defect in the 98820-6CB1B can show up through the airbag warning light, error messages in the instrument cluster or a fault memory that cannot be cleared.

• Airbag warning light stays on constantly or flickers intermittently
• Error message in the instrument cluster
• Diagnostic tool does not find the control unit
• Fault memory cannot be cleared

Such symptoms indicate that airbags and seatbelt pretensioners might not trigger in an emergency. The fault should then be checked promptly.

Which vehicles is the 98820-6CB1B fitted in?

The 98820-6CB1B is found in the following vehicles: Nissan Altima L34 (2018-2022).

An overview of the models:

• Nissan Altima L34 (2018-2022)

Before removal, compare the part number on the label of the unit with this information. Also have the fault memory read out, so it is clear whether the control unit is defective or a plug or cable is causing the fault.

For the same vehicles, we also repair control units with the part numbers 98820-3TA9C, 98820-9HS9A, 98820-9HS9B.

How does the repair of the 98820-6CB1B work?

At Airbag24, checking, repairing and testing the control unit 98820-6CB1B usually take 3–4 working days. Afterwards you receive your own, repaired unit back.

First the fault memory is read out, and the log goes into the parcel. The battery is disconnected before you remove the control unit and create the repair order online.

Airbag24 replaces defective components, erases crash data and carries out a function test. 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 98820-6CB1B get to Airbag24?

The control unit 98820-6CB1B comes to Airbag24 as a parcel, or alternatively UPS collects it for an extra charge. After the repair, UPS brings it back to you.

Print out the repair order and put it into the parcel, then pack the control unit shock-proof.