Airbag control unit with part number 98820-1UR0B

What does the airbag control unit 98820-1UR0B do?

The airbag control unit 98820-1UR0B is the control unit of the restraint system (SRS) in Infiniti vehicles. It processes the signals from the crash sensors and, in a crash, selects which airbags and seatbelt pretensioners are triggered, within milliseconds.

During driving, the unit continuously checks the system and reports faults via the airbag warning light. After an accident it secures crash data and then locks itself.

The system is only as reliable as its control unit, which is why a fault in the unit should be taken seriously.

Why does the control unit 98820-1UR0B fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other suspects are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Voltage spikes arise, for example, from a weak battery or a jump start. They stress the electronics and are therefore possible causes.

Which of these causes applies is only shown by the fault memory once it has been read out.

How can you tell that the 98820-1UR0B is defective?

If the airbag warning light in the instrument cluster stays on permanently or intermittently, a defect is likely. A fault message, no connection to the diagnostic tool and a fault memory that cannot be cleared are further signs.

The airbag warning light indicates the defect, so a check without delay is advisable. In an emergency, airbags and seatbelt pretensioners may therefore fail to deploy.

Which vehicles is the 98820-1UR0B fitted in?

The control unit was fitted in the following vehicles: Infiniti QX50 J50 (2007-2013) and J50 Facelift (2013-2018).

The following list sets out the individual vehicles.

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

Compare the part number on the label of the removed unit with this page to make sure it is the right unit. Have the fault memory read out in addition, because it shows whether the control unit is defective or whether a cable or connector 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 98820-1UR0B work?

Start by having the fault memory read out and enclose the log with the unit. Then disconnect the battery and remove the control unit; afterwards create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored 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 98820-1UR0B get to Airbag24?

You ship the unit as a parcel, or you have it collected by UPS for an extra charge. After the repair, Airbag24 brings the unit back to you by UPS.

The printed repair order goes into the parcel, and the unit is packed shockproof.