Airbag control unit with part number 68492120AA

What does the airbag control unit 68492120AA do?

The airbag control unit 68492120AA is the central control unit of the restraint system (SRS) for Jeep. It evaluates the signals from the crash sensors, decides within milliseconds in an accident whether the airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The device reports faults via the airbag warning light in the instrument cluster.

After an accident, it stores crash data and locks itself.

Why does the control unit 68492120AA 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 causes in detail are:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

The crash data remain stored in the unit, and a diagnostic tool cannot remove them.

How can you tell that the 68492120AA is defective?

A defect shows up as the airbag warning light in the instrument cluster staying on, as an error message in the instrument cluster, as a lost connection between the diagnostic tool and the control unit, and as a fault memory that cannot be cleared.

If the control unit is faulty, the airbags and seatbelt pretensioners may not deploy in an emergency. The warning light gives this indication, so take it seriously.

Which vehicles is the 68492120AA fitted in?

The airbag control unit 68492120AA is fitted in these vehicles: Jeep Wrangler JL (from 2018). Whether it suits your own car is shown by comparing it with this list.

The assignment in detail is set out here.

• Jeep Wrangler JL (from 2018)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. You should also have the fault memory read out, 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 68398609AB, P68003421AB.

How does the repair of the 68492120AA work?

First, have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit 68492120AA. Next, create a repair order online; testing, repair and function test at Airbag24 usually take 3–4 working days.

The sequence is fixed for safety reasons: disconnecting the battery comes before removal.

Send in the well-packed unit. Airbag24 checks it, repairs defective components, deletes the stored crash data and carries out a function test. 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 68492120AA get to Airbag24?

You send the control unit 68492120AA in as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

The printed repair order goes into the parcel, and the unit is packed shock-proof.