Airbag control unit with part number 98820-5NL1B

What does the airbag control unit 98820-5NL1B do?

The airbag control unit 98820-5NL1B controls the restraint system (SRS) in Infiniti. It evaluates the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

It shows faults via the airbag warning light. Sensors, evaluation and triggering work closely together, which makes the unit a central component of vehicle safety.

Why does the control unit 98820-5NL1B fail?

The most common cause is crash data stored after an accident, which a normal diagnostic tool does not remove. Aged components, cold solder joints, moisture on plug connections and voltage spikes are added to this.

Crash data is created not only after a trigger; an accident without a deployed airbag can also leave it behind.

Other causes include:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

How can you tell that the 98820-5NL1B is defective?

A defect in the 98820-5NL1B becomes apparent through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition, error messages appear, the diagnostic tool cannot reach the control unit, or the fault memory remains.

In this state, the airbags and seatbelt pretensioners may fail to deploy in an emergency. Please take these signs seriously and have the system checked promptly.

Which vehicles is the 98820-5NL1B fitted in?

The control unit 98820-5NL1B is fitted in these vehicles: Infiniti QX50 J50 (2007-2013) and J50 Facelift (2013-2018).

The models in detail:

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

Comparing the label of the removed unit with this page only ensures that it is the right unit. Whether the control unit itself is defective or a plug or cable is the cause is shown only by the fault memory, which you have read out beforehand.

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 98820-5NL1B work?

Your first step: have the fault memory read out and put the log in the parcel. Then disconnect the battery and only afterwards remove control unit 98820-5NL1B. Next, create the repair order online and send the well-packed unit.

Airbag24 checks it on the test bench, replaces defective components, erases stored crash data and carries out a function test. The own unit then goes back to you. Processing at Airbag24 usually takes 3–4 working days; this time covers only 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 98820-5NL1B get to Airbag24?

You send control unit 98820-5NL1B as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it via UPS.

Next to the unit, the parcel contains the printed repair order, and the unit is packed shockproof.