Airbag control unit with part number 98820 JD11A

What does the airbag control unit 98820 JD11A do?

The airbag control unit 98820 JD11A is the control unit of the restraint system (SRS) for Nissan. In an accident it processes the signals from the crash sensors and decides within milliseconds which airbags and seatbelt pretensioners are triggered. The unit monitors the system continuously, and it reports faults via the airbag warning light.

The unit is therefore the link between the sensors and the restraint devices. Any disturbance in this interplay is recorded in the fault memory.

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

Why does the control unit 98820 JD11A fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Other causes include aged electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes.

A normal diagnostic tool cannot erase the crash data. It remains in the unit until it is removed during the repair.

The other causes concern the electronics and the connections. Aged components react sensitively to voltage fluctuations, for example when a jump start is used or the battery is weak. Moisture and corrosion weaken the contacts on the plugs.

How can you tell that the 98820 JD11A is defective?

A defect shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently, and as a fault message in the instrument cluster. In addition, the diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared.

The warning light makes the state of the system visible. When it appears, airbags and seatbelt pretensioners may not deploy in an emergency. An inspection is then sensible.

Which vehicles is the 98820 JD11A fitted in?

The airbag control unit 98820 JD11A is fitted in these vehicles: Nissan Qashqai J10 (2006-2010) and J10 Facelift (2010-2013).

The following list names the vehicles registered for this part number.

• Nissan Qashqai J10 (2006-2010)
• Nissan Qashqai J10 Facelift (2010-2013)

Comparing the part number on the label of the removed unit with this page only confirms that it is the correct unit. Have the fault memory read out beforehand. Only the log shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 25567EB301, 988204EH0C, 98820BK10A, 98820BK50A, 98820BT40A, 98820BT70A.

How does the repair of the 98820 JD11A work?

You first have the fault memory read out and attach the log. Then you disconnect the battery and only afterwards remove the control unit. Next you create a repair order online and send the unit in.

Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. The unit then goes back to you.

Processing at Airbag24 normally takes 3–4 working days. 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 JD11A get to Airbag24?

You either send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

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