Airbag control unit with part number 98820-5NT1A

What does the airbag control unit 98820-5NT1A do?

The airbag control unit 98820-5NT1A controls the SRS restraint system of Infiniti. It reads the crash sensors, calculates in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system while driving. It reports detected faults via the airbag warning light.

After an accident the unit stores crash data and locks itself.

It works together with sensors, wiring harnesses and airbags as one unit, and its evaluation is decisive for the entire system.

Why does the control unit 98820-5NT1A fail?

Stored crash data is the most common cause, and indeed also when no airbag was deployed in the accident. A normal diagnostic tool cannot remove it. Added to this are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from a weak battery or a jump start.

The data is created in the control unit when it evaluates the accident, and then remains in memory. A common diagnostic tool cannot remove it.

Aged components, solder joints and plug connections are among the causes that make themselves felt over the years. Voltage spikes, on the other hand, act suddenly, for example when starting with a weak battery.

How can you tell that the 98820-5NT1A is defective?

The airbag warning light in the instrument cluster stays on permanently or lights up from time to time, a fault message there is possible, and the diagnostic tool does not find the control unit. Furthermore, the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may fail to deploy in the event of a defect, so every indication of the warning light deserves attention.

The system reports the fault itself, so it becomes visible immediately rather than only coming to light at a later inspection.

Which vehicles is the 98820-5NT1A fitted in?

The 98820-5NT1A is fitted in these vehicles: Infiniti QX50 J50 (2007-2013) and J50 Facelift (2013-2018).

The list of vehicles for this part number is directly below.

• Infiniti QX50 J50 (2007-2013)
• Infiniti QX50 J50 Facelift (2013-2018)

Whether the part number on the label of the removed unit matches this page shows that you have the correct unit. The comparison does not show the cause. Therefore have the fault memory read out beforehand, because only this result clarifies whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 98820-5NY9B, 98820-5UB0A, 988201BA0B, 988201BA0C, 988205NL0B.

How does the repair of the 98820-5NT1A work?

You have the fault memory read out and add the log before you disconnect the battery and remove the control unit. Then you create a repair order online and send off the well-packed unit. Airbag24 usually needs 3–4 working days for checking, repairing and testing.

Airbag24 examines the unit on the test bench, replaces defective components, erases stored crash data and tests the function. Afterwards your own unit is returned to you.

The order follows from safety reasons: removal only comes after the readout and the disconnection of the battery.

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 98820-5NT1A get to Airbag24?

For shipping, these routes are open to you: send the parcel yourself or book a UPS collection for an extra charge. Airbag24 sends the unit back by UPS after the repair.

The printed repair order goes into the parcel with it, and the unit is packed shock-resistant.