Airbag control unit with part number 98820-4KV1B

What does the airbag control unit 98820-4KV1B do?

The airbag control unit 98820-4KV1B controls the restraint system (SRS) of Nissan. It measures the decelerations via the crash sensors, decides in an accident within fractions of a second whether airbags and seatbelt pretensioners are triggered, and reports faults to the airbag warning light.

To do this, it continuously checks the function of the sensors, the cables and the firing circuits.

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

Why does the control unit 98820-4KV1B fail?

The most common reason is crash data stored after an accident, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Crash data remains in the unit after an accident, even if no airbag fired. An attempt to erase it with a diagnostic tool remains unsuccessful.

Electronic components age, solder joints can go cold, and moisture causes plug connectors to corrode.

Voltage spikes, for example with a weak battery or when starting with external power, can also damage the electronics.

How can you tell that the 98820-4KV1B is defective?

The airbag warning light lights up in the instrument cluster permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. A further sign is that the fault memory cannot be cleared.

• Airbag warning light lights up permanently or intermittently
• Fault message in the instrument cluster
• No connection between the diagnostic tool and the control unit
• Fault memory cannot be cleared

If there is a defect, airbags and seatbelt pretensioners may fail to trigger in an emergency. Take the warning seriously and have the system checked.

Which vehicles is the 98820-4KV1B fitted in?

The airbag control unit 98820-4KV1B is fitted in these vehicles: Nissan Navara D23 (2015-2020). Whether it suits your own vehicle is only shown by comparing it with the list.

The assignment in detail is shown in the overview.

• Nissan Navara D23 (2015-2020)

Compare the part number on the label of the removed unit with this page; this only ensures that it is the right unit. Also have the fault memory read out, because the log shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 0 285 015 304, 98820 6KB0A, 98820 EB01D, 988204KJ1A.

How does the repair of the 98820-4KV1B work?

First have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit 98820-4KV1B and create a repair order online. Testing, repairing and the function test at Airbag24 take 3–4 working days as a rule.

The sequence is fixed for safety reasons: read out first, disconnect the battery, and only then remove the unit.

Send the well-packed unit in. Airbag24 tests it on the test bench, repairs defective components, deletes the stored crash data and carries out a function test. Afterwards, your own unit is returned 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 98820-4KV1B get to Airbag24?

You send the control unit 98820-4KV1B to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Include the printed repair order and pack the unit shockproof.