Airbag control unit with part number 98820-3KA0A

What does the airbag control unit 98820-3KA0A do?

The airbag control unit 98820-3KA0A is the control hub of the restraint system (SRS) of Nissan. It processes the signals from the crash sensors, determines in an accident within milliseconds the triggering of airbags and seatbelt pretensioners, and monitors the entire system.

The unit shows faults via the airbag warning light. After an accident it stores crash data and locks itself. Only the repair lifts the lock.

Why does the control unit 98820-3KA0A fail?

Most often the cause is crash data that remains stored after an accident, even if no airbag has been triggered. An ordinary diagnostic tool does not delete it. Further causes include ageing of the electronics, solder joints and plug connectors, and voltage spikes.

These further causes come into consideration:

• Ageing of electronic components
• Cold solder joints on the circuit board
• Moisture and corrosion on plugs
• Voltage spikes, for example with a weak battery or when starting with jump leads

Airbag24 deletes the crash data during the repair. The test then shows which of the other causes is present in the unit.

How can you tell that the 98820-3KA0A is defective?

A defect becomes visible through the airbag warning light in the instrument cluster when it lights up permanently or intermittently. Added to this are error messages in the instrument cluster, a disrupted connection to the diagnostic tool, and a fault memory that cannot be cleared.

Signs like these mean that airbags and seatbelt pretensioners may not deploy in an emergency. Pay attention to the warning light, and have the cause clarified.

Which vehicles is the 98820-3KA0A fitted in?

The 98820-3KA0A is fitted in these vehicles: Nissan Pathfinder R51 (2004-2007), R51 1st Facelift (2007-2010) and R51 2nd Facelift (2010-2013).

The following list names the individual vehicles:

• Nissan Pathfinder R51 (2004-2007)
• Nissan Pathfinder R51 1st Facelift (2007-2010)
• Nissan Pathfinder R51 2nd Facelift (2010-2013)

Comparing the part number on the label of the removed unit with this page only secures that you have the right unit. In addition, have the fault memory read out, because only the result shows whether the control unit is defective or whether a plug or cable lies behind the fault.

For the same vehicles, we also repair control units with the part numbers 0285001781 Bosch, 98820 EA51C, 98820-3KW0A, 988205X30C.

How does the repair of the 98820-3KA0A work?

Have the fault memory read out first and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Next create the repair order online and pack the unit securely.

Then send the unit in. Airbag24 checks it on the test bench, replaces defective components, deletes the crash data and carries out a function test. Processing usually takes 3–4 working days.

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 98820-3KA0A get to Airbag24?

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

Pack the unit shock-proof and enclose the printed repair order.