Airbag control unit with part number 98820-EZ21C

What does the airbag control unit 98820-EZ21C do?

The airbag control unit 98820-EZ21C is the control centre of the restraint system in vehicles of the make Nissan. It checks the signals from the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners trigger, and monitors the system continuously.

Detected faults can be seen via the warning light in the instrument cluster. After an accident the unit stores crash data and locks itself.

Why does the control unit 98820-EZ21C fail?

The most common cause is stored crash data, even without an airbag having deployed. A standard diagnostic tool does not erase it. Further causes are aged components, moisture on plugs and voltage spikes.

Removing the crash data is part of the repair at Airbag24.

• ageing of the electronics
• solder joints that have gone cold
• wetness and rust at plug connections
• voltage spikes from a weak battery or a jump start

How can you tell that the 98820-EZ21C is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears in the instrument cluster. The diagnostic tool also finds no connection to the control unit, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may fail to deploy in an emergency.

A diagnostic tool that cannot establish a connection is a serious sign. Still, the cause does not automatically lie in the control unit; the fault memory clarifies that.

Anyone who keeps an eye on the light will notice faults early.

Which vehicles is the 98820-EZ21C fitted in?

The control unit 98820-EZ21C is used in vehicles of the make Nissan. Specifically, it is fitted in these vehicles: Nissan Titan H61 (2015-2020).

The vehicles are listed below.

• Nissan Titan H61 (2015-2020)

You use the label comparison to check the number on the removed unit against this page; it tells you nothing more. Have the fault memory read out first, because only the log shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285013989, 98820-EZ20B, 98820-EZ29B.

How does the repair of the 98820-EZ21C work?

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

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

The order of steps is there for safety reasons and must be observed.

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-EZ21C get to Airbag24?

You send the control unit 98820-EZ21C as a parcel or book a UPS collection for an extra charge. After the repair, the unit returns to you by UPS.

Enclose the printed repair order with the parcel and pack the unit shock-proof.