Airbag control unit with part number 98820 BN902 R

What does the airbag control unit 98820 BN902 R do?

The airbag control unit 98820 BN902 R is the central control unit of the restraint system (SRS) for Nissan. It evaluates the signals from the crash sensors, decides in a fraction of a second in an emergency which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It shows faults via the airbag warning light.

Monitoring runs in the background throughout the whole journey. If the unit detects a fault, it creates an entry in the fault memory, which a workshop or a diagnostic tool can read out.

After an accident, it stores crash data and locks itself.

Why does the control unit 98820 BN902 R fail?

Stored crash data is the most common cause on the 98820 BN902 R, even if no airbag has deployed. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes. With this control unit, deleting the crash data is often not possible; if you would like it deleted, contact Airbag24 briefly before sending the unit in, so that it can check the part number.

Crash data is created in the control unit after an accident, even if no airbag has deployed. If a unit fails after an accident, crash data sits at the top of the list of possible causes.

Ageing of the electronic components, cold solder joints and moisture also play a role. Moisture and corrosion disrupt the contacts at plug connectors, and voltage spikes, for example from a weak battery or a jump start, put a strain on the electronics.

How can you tell that the 98820 BN902 R is defective?

The airbag warning light in the instrument cluster lights up on the 98820 BN902 R, either permanently or intermittently. In addition, a fault message appears in the instrument cluster, the diagnostic tool cannot connect to the control unit, and the fault memory cannot be cleared.

In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

A lit warning light is therefore a clear reason to have the system checked.

Which vehicles is the 98820 BN902 R fitted in?

The control unit 98820 BN902 R is fitted in these vehicles: Nissan Almera N16 Facelift (2002-2006). The list helps you identify your vehicle.

The vehicles at a glance:

• Nissan Almera N16 Facelift (2002-2006)

First compare the part number on the label of the removed unit with this page. That way you can be sure it is the right unit. Also have the fault memory read out before removal, because only that shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285001316, 285001318, 285001638, 28556 5M303, 28556-BN903, 285565M301.

How does the repair of the 98820 BN902 R work?

First have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit. Then create a repair order online and send the unit in, well packed. Airbag24 checks the 98820 BN902 R on the test bench, replaces defective components and carries out a function test; processing at Airbag24 usually takes 3–4 working days.

The order of these steps is for safety on the vehicle, so please follow it exactly. If you would like the crash data deleted, contact Airbag24 briefly before sending the unit in.

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 BN902 R get to Airbag24?

You send the control unit 98820 BN902 R 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 shockproof.