Airbag control unit with part number 98820-EZ50B

What does the airbag control unit 98820-EZ50B do?

The airbag control unit 98820-EZ50B is the SRS control unit of Nissan. It coordinates the airbags and seatbelt pretensioners, continuously evaluates the signals from the crash sensors and decides within milliseconds whether to trigger them in an accident. It also monitors the entire restraint system and reports faults via the airbag warning light.

The signals come from sensors distributed throughout the vehicle. Only an evaluation in the control unit leads to the trigger command, and only if the values justify it.

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

Why does the control unit 98820-EZ50B fail?

Crash data stored after an accident are the most common cause, even if no airbag has deployed. This data cannot be cleared with a normal diagnostic tool. Other factors include aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

The crash data remain stored in the unit beyond the accident, as long as nobody removes them. Because the vehicle can still be driven, the entry does not normally stand out in everyday use.

The remaining causes relate to the electronics and their connections. A damp plug contact can produce symptoms like a unit defect, so a close look at the connections is worthwhile.

How can you tell that the 98820-EZ50B is defective?

An airbag warning light that lights up permanently or intermittently is the clearest sign of a defect in the 98820-EZ50B. An error message in the instrument cluster and a diagnostic tool without connection can also appear. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

In detail, these findings occur:

• airbag warning light in the instrument cluster, permanently or intermittently on
• error message in the instrument cluster
• diagnostic tool finds no connection to the control unit
• fault memory cannot be cleared

With findings like these, a check of the restraint system is worthwhile without delay.

Which vehicles is the 98820-EZ50B fitted in?

The 98820-EZ50B is fitted in these vehicles: Nissan Titan H61 (2015-2020).

The assignment lists these models:

• Nissan Titan H61 (2015-2020)

Checking the label on the unit against this page confirms that it is the correct unit. The only open question, which the fault memory answers, is whether the control unit itself is defective or whether a plug or cable is responsible.

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-EZ50B work?

Have the fault memory read out and keep the log before you disconnect the battery. Then remove the 98820-EZ50B, create the repair order online and send the unit in, well packed. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24, the unit is tested on the test bench, damaged parts are replaced, crash data are removed and the function is tested. Your own unit 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-EZ50B get to Airbag24?

You can either send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the control unit 98820-EZ50B back to you by UPS. The printed repair order goes in the parcel.

A sturdy box with padding is suitable for transport, enclosing the unit so it is shock-proof.