Airbag control unit with part number 68492120AB

What does the airbag control unit 68492120AB do?

The airbag control unit 68492120AB is the central control unit of the SRS restraint system of Jeep. It evaluates the signals from the crash sensors and, in a crash, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

In addition, it continuously monitors the entire system. It makes any fault it detects visible via the airbag warning light in the instrument cluster.

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

Why does the control unit 68492120AB fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Aged components, cold solder joints, moisture and corrosion in plug connectors, and voltage spikes may also be involved.

The crash data remains in memory, and a standard diagnostic tool cannot erase it. This remains the case even if the vehicle seems unaffected after the event.

Components age, solder joints can become cold, and moisture or salt damage plug contacts. Voltage spikes, for example from a weak battery or jump-starting, add further strain on the electronics.

How can you tell that the 68492120AB is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. An error message appears alongside it, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

As long as these signs persist, airbags and seatbelt pretensioners may not deploy in an emergency.

The cause only becomes clear when the fault memory is read out.

Which vehicles is the 68492120AB fitted in?

The control unit 68492120AB is registered for Jeep and is fitted in these vehicles: Jeep Wrangler JL (from 2018).

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

• Jeep Wrangler JL (from 2018)

Comparing the part number on the label with this page only confirms that the unit is the correct one. Having the fault memory read out is the more important step, because it 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 68398609AB, P68003421AB.

How does the repair of the 68492120AB work?

Have the fault memory read out first and enclose the log. Then disconnect the battery and only then remove the control unit 68492120AB. Next, create a repair order online and pack the unit well for sending.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Afterwards, your own unit is returned to you. Airbag24 generally needs 3–4 working days for this, and that time applies only to this work.

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 68492120AB get to Airbag24?

You send the control unit 68492120AB as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Put the printed repair order in the parcel. The unit must be packed shock-proof.