Airbag control unit with part number 68621937AG

What does the airbag control unit 68621937AG do?

The control unit 68621937AG is the central evaluation unit of the restraint system for Jeep. It processes the crash sensor signals and, in a crash, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

During operation, it monitors the entire system. If it detects a fault, it reports this via the airbag warning light in the instrument cluster.

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

Why does the control unit 68621937AG fail?

On the control unit 68621937AG, the most common cause is crash data stored after an accident, even if no airbag has been triggered. Normal diagnostic tools cannot erase this data. Other causes are ageing components, cold solder joints, moisture and corrosion, and voltage spikes.

The other causes can be broadly grouped as follows:

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

Which cause applies in an individual case is shown only by reading out the fault memory. The crash data itself must be removed during the repair.

How can you tell that the 68621937AG is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. In addition, there is a fault message on the display, a diagnostic tool without connection to the control unit, and a fault memory that cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to trigger.

The warning light is the visible side of a fault that the system has detected itself. A warning of this kind should be checked without waiting long.

If the light is on, please clarify the cause before you rely on the system.

Which vehicles is the 68621937AG fitted in?

The control unit 68621937AG is fitted in these vehicles: Jeep Wrangler JL (from 2018).

The models on record are listed below.

• Jeep Wrangler JL (from 2018)

A comparison of the part number on the label of the housing with this page confirms that you have the matching unit. Before that, please have the fault memory read out, because only this result shows whether the control unit is defective or whether a plug or cable is responsible for the fault.

For the same vehicles, we also repair control units with the part numbers 68398609AB, P68003421AB.

How does the repair of the 68621937AG work?

First, have the fault memory for the control unit 68621937AG read out and enclose the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, replaces defective components where necessary, erases the stored crash data and carries out a functional test.

Processing usually takes 3–4 working days. Afterwards, you receive your own unit back. 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 68621937AG get to Airbag24?

You send the control unit 68621937AG to Airbag24 as a parcel or book a collection by UPS for an extra charge. After the repair, it returns to you by UPS.

Put the printed repair order in the parcel and pack the unit shock-proof.