Airbag control unit with part number 98820-5SR1B

What does the airbag control unit 98820-5SR1B do?

The airbag control unit 98820-5SR1B is the central control unit of the restraint system (SRS) of Nissan. It evaluates the signals from the crash sensors, decides in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

During driving, the unit checks its components. If a fault is detected, the airbag warning light in the instrument cluster indicates it.

After an accident, the control unit stores crash data and locks itself. This storage is part of its tasks.

Why does the control unit 98820-5SR1B fail?

Stored crash data is the most common cause. It arises after an accident, even if no airbag has deployed, and a normal diagnostic tool cannot clear it. Other causes can be technical in nature.

Ageing electronic components, cold solder joints, and moisture and corrosion at plug connections can affect the unit just as much. Voltage spikes, for example from a weak battery or after jump-starting, also belong to this group.

Which cause is actually present is shown only by the examination. Airbag24 deletes the crash data during the repair.

How can you tell that the 98820-5SR1B is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and a fault message appears. In addition, the diagnostic tool does not establish a connection to the control unit, or the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. It is advisable to have these signs checked promptly.

Which vehicles is the 98820-5SR1B fitted in?

The 98820-5SR1B is fitted in these vehicles: Nissan Leaf ZE1 (from 2017).

The following models are recorded for this part number:

• Nissan Leaf ZE1 (from 2017)

Before you remove the control unit, have the fault memory read out. This shows whether the control unit is really defective or whether a plug or cable is the cause. Then compare the part number on the label with this page.

For the same vehicles, we also repair control units with the part numbers 98820-4NS0A, 98820-4NS9A, 98820-5SA0E.

How does the repair of the 98820-5SR1B work?

First, read out the fault memory and enclose the log with the unit. Then disconnect the battery, remove the control unit, create the repair order online and send the well-packed unit in. Airbag24 repairs it and sends it back.

At Airbag24, the unit is first examined on the test bench. Defective components are replaced, stored crash data is deleted, and a function test follows.

Processing at Airbag24 usually takes 3–4 working days. This time applies exclusively to checking, repairing and testing.

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 98820-5SR1B get to Airbag24?

You send the control unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Place the printed repair order in the parcel and pack the control unit shock-resistant.