Airbag control unit with part number 98820-1UR0A

What does the airbag control unit 98820-1UR0A do?

The airbag control unit 98820-1UR0A controls the restraint system (SRS) of Infiniti. It evaluates the crash sensors, decides in an accident within fractions of a second which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

If the device detects a fault, it reports it via the airbag warning light in the instrument cluster. While driving, this monitoring runs unobtrusively in the background.

Why does the control unit 98820-1UR0A fail?

The most common cause is stored crash data after an accident, even if no airbag has triggered; a normal diagnostic tool cannot delete it. Other causes include aged components, defective solder joints, moisture at plug connections and voltage spikes.

The data arises in the accident itself and remains in the device afterwards. The other causes in brief:

• Ageing of the electronic components
• Defective solder joints in the device
• Corrosion and moisture at connectors
• Voltage spikes, for example from a weak battery or a jump start

How can you tell that the 98820-1UR0A is defective?

The airbag warning light in the instrument cluster is on permanently or intermittently, a fault message appears in the instrument cluster, or the diagnostic tool finds no connection to the control unit. If the fault memory cannot be cleared, that is also a sign. Airbags and seatbelt pretensioners may then not trigger in an emergency.

The light is the clearest warning sign. Take it seriously and have the system checked promptly.

A fault message in the instrument cluster and a diagnostic tool without connection should be considered together; both indications show that something is wrong in the restraint system.

Which vehicles is the 98820-1UR0A fitted in?

The 98820-1UR0A is fitted in these vehicles: Infiniti QX50 J50 (2007-2013) and J50 Facelift (2013-2018). Whether your car is among them is clarified by comparing it with the list.

The vehicles for which this part number is stored are listed here:

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

Compare the part number on the label of the removed device with this page; that way you can be sure you have the right device in front of you. Also have the fault memory read out in advance, because only this result shows whether the control unit is defective or whether a connector or a 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 98820-1UR0A work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit. Then create a repair order online and send the well-packed device in. Checking, repairing and testing at Airbag24 usually take 3–4 working days.

The log is important for the check because it records the state before the intervention. Airbag24 examines the control unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Your own device is then 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 98820-1UR0A get to Airbag24?

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

Put the printed repair order in the parcel and pack the device shockproof.