Airbag control unit with part number 98820-9UC5B

What does the airbag control unit 98820-9UC5B do?

The 98820-9UC5B is the central control unit of the restraint system (SRS) in Nissan. It evaluates the crash sensors, decides within milliseconds in a crash on airbags and seatbelt pretensioners, and indicates faults via the airbag warning light.

During operation, monitoring runs continuously, and every irregularity ends up in the fault memory.

After a crash, the unit stores crash data and locks itself.

Why does the control unit 98820-9UC5B fail?

Stored crash data is the most common cause of failure in the 98820-9UC5B, even if no airbag has been triggered. An ordinary diagnostic tool cannot erase it. Added to this are aged electronic components, cold solder joints, moisture and corrosion, as well as voltage spikes.

This data remains in the unit and cannot be removed with an ordinary diagnostic tool. The finding is therefore the first point to be clarified.

The other causes are general in nature: electronic components age, solder joints can go cold, and moisture or corrosion attack plug connections. Voltage spikes, for example from a weak battery or when connecting a jump start, also strain the electronics.

How can you tell that the 98820-9UC5B is defective?

The warning light in the instrument cluster indicates a defect in the 98820-9UC5B as soon as it lights up constantly or intermittently. A fault message may be added. In an emergency, airbags and seatbelt pretensioners may possibly fail to deploy.

A diagnostic tool that cannot establish a connection to the control unit is a further sign. The same applies to a fault memory that cannot be erased.

The warning requires prompt investigation, and reading out the fault memory brings the necessary clarity.

Which vehicles is the 98820-9UC5B fitted in?

This assignment applies to Nissan. The control unit 98820-9UC5B is fitted in these vehicles: Nissan Murano Z52 (2015-2024).

The vehicles in detail:

• Nissan Murano Z52 (2015-2024)

First compare the part number on the label of the removed unit with this page. That establishes whether it is the right unit. Only the fault memory read out beforehand shows whether it is defective.

For the same vehicles, we also repair control units with the part numbers 629198200, 988205AA0A.

How does the repair of the 98820-9UC5B work?

Before removal, you read out the fault memory and enclose the log. Then disconnect the battery, remove the 98820-9UC5B, create the repair order online and send the unit in well packed. Processing at Airbag24 generally takes 3–4 working days for testing, repairing and checking.

Airbag24 examines the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test.

Your own unit is then returned. 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 98820-9UC5B get to Airbag24?

You send the control unit 98820-9UC5B as a parcel or book a UPS collection for an extra charge. After repair, the unit is returned by UPS.

Enclose the printed repair order and pack the unit shockproof.