Airbag control unit with part number 98820 BH10A

What does the airbag control unit 98820 BH10A do?

The 98820 BH10A is the control unit of the restraint system (SRS) for Nissan. It evaluates the signals from the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

The system consists of sensors, trigger elements and the control unit, which processes all the information. A fault is reported via the airbag warning light in the instrument cluster.

Why does the control unit 98820 BH10A fail?

The most common cause with 98820 BH10A is stored crash data after an accident, even without a deployed airbag. Other causes include ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes. With this control unit, erasing the crash data is often not possible; if you want it erased, contact Airbag24 briefly before sending the device in, and Airbag24 then checks the number.

Crash data remains in the device, and a normal diagnostic tool cannot remove it. The fact that no airbag was deployed does not change this.

The other causes relate to ageing and environmental influences. Over the years, solder joints can become brittle, and moisture attacks the contacts. Voltage spikes, for example from a weak battery or jump-starting, put additional strain on the electronics.

How can you tell that the 98820 BH10A is defective?

A defect in the 98820 BH10A shows itself first through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition there are a fault message, a missing connection between the diagnostic tool and the control unit, and a fault memory that cannot be erased. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

The warning light comes directly from the system and is not a guess. Anyone who notices it should have the vehicle checked promptly rather than accept the condition.

Which vehicles is the 98820 BH10A fitted in?

The control unit 98820 BH10A is fitted in the following vehicles: Nissan Note E11 (2005-2007), E11 2nd Facelift (2009-2013) and E11 1st Facelift (2007-2009). The part number is decisive, rather than the vehicle name alone.

The list of vehicles recorded for this number is directly below.

• Nissan Note E11 (2005-2007)
• Nissan Note E11 2nd Facelift (2009-2013)
• Nissan Note E11 1st Facelift (2007-2009)

A comparison with the label of the removed device only confirms that it is the correct device, and does not establish the cause. For that, have the fault memory read out beforehand. Only then will it be clear whether the control unit itself is defective or whether a plug or cable is causing the problem.

For the same vehicles, we also repair control units with the part numbers 285001909, 28556 1U60C, 28556 1U62A, 28556 1U62B, 28556 1U70A, 98820 9U20A.

How does the repair of the 98820 BH10A work?

Have the fault memory read out and attach the log. Then disconnect the battery before you remove the control unit 98820 BH10A. Next, create a repair order online and send the device in well packed.

This sequence is binding for safety reasons. Airbag24 checks the device on the test bench, repairs defective components and carries out a function test. Processing usually takes 3–4 working days.

If you want the crash data erased, contact Airbag24 briefly before sending the device. 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 BH10A get to Airbag24?

You send the 98820 BH10A either as a parcel, or you book a UPS collection for an extra charge. UPS handles the return journey, because Airbag24 sends the device back to you by UPS after the repair.

Put the printed repair order into the parcel. Pack the control unit shock-proof, so that it arrives undamaged.