Airbag control unit with part number 98820-5UR0A

What does the airbag control unit 98820-5UR0A do?

The airbag control unit 98820-5UR0A is the central control unit of the restraint system (SRS) for Nissan. It evaluates the signals from the sensors, decides in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

It shows the state of the system via the airbag warning light in the instrument cluster. A fault therefore does not go unnoticed.

Why does the control unit 98820-5UR0A fail?

The most common cause is stored crash data after an accident, even without a deployed airbag. Other causes are ageing of the components, cold solder joints, moisture and corrosion, and voltage spikes.

A normal diagnostic tool cannot erase this data, which is why the fault persists stubbornly. Other causes at a glance:

• ageing of the electronic components
• cold solder joints on the circuit board
• moisture or corrosion at plugs
• voltage spikes, for example from a weak battery

How can you tell that the 98820-5UR0A is defective?

A fault in the 98820-5UR0A becomes visible through the airbag warning light in the instrument cluster and through error messages. In addition, a diagnostic tool that cannot establish a connection.

• Warning light on permanently
• Warning light on intermittently
• Error message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory cannot be cleared

Seatbelt pretensioners and airbags may then fail to deploy in an emergency. Therefore have the system checked promptly.

Which vehicles is the 98820-5UR0A fitted in?

These vehicles use control unit 98820-5UR0A: Nissan Sylphy B17 (from 2012).

The following vehicles are assigned to this part number:

• Nissan Sylphy B17 (from 2012)

Comparing the label of the removed unit with this page lets you confirm that it is the right unit. Whether the control unit is really defective or a plug or cable is the cause is shown only by a fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers 28556-3RA0A, 28556-3RB0A, 28556-3RC0A, 28556-3RD0B, 28556-3RF0B, 28556-3RL0A.

How does the repair of the 98820-5UR0A work?

First have the fault memory read out and attach the log. Then disconnect the battery; only then remove control unit 98820-5UR0A. Checking, repairing and testing at Airbag24 usually take 3–4 working days.

Next, create a repair order online and pack the unit well before it goes on its way. Airbag24 examines it, replaces defective components, erases stored crash data and carries out a function test. Your own unit then goes back to you.

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 98820-5UR0A get to Airbag24?

You send control unit 98820-5UR0A yourself as a parcel or book a UPS collection for an extra charge. Airbag24 sends the repaired unit back via UPS.

Pack the unit shockproof and put the printed repair order inside.