Airbag control unit with part number P68186640AC

What does the airbag control unit P68186640AC do?

The airbag control unit P68186640AC is the central control unit of the restraint system (SRS) of Jeep. It evaluates the signals from the crash sensors, decides in a crash within milliseconds about airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

The device reports faults via the airbag warning light in the instrument cluster. Monitoring runs for as long as the vehicle has power.

In everyday use this work is hardly noticed. It only becomes visible when a fault is reported.

Why does the control unit P68186640AC fail?

Most often the cause is crash data stored after an accident, even when no airbag has triggered. A normal diagnostic tool cannot erase them. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Crash data are recorded by the unit at the moment of impact. They stay in memory until they are deliberately erased and can document the fault memory even when nothing more is visible on the vehicle.

The other causes tend to develop gradually. An ageing component or a damp contact can distort signals long before something fails completely.

How can you tell that the P68186640AC is defective?

A defect in the P68186640AC shows up as the airbag warning light lighting up permanently or intermittently. A fault message in the instrument cluster, a missing connection to the diagnostic tool or a fault memory that cannot be cleared also belong to it.

A diagnostic tool that cannot establish a connection does not automatically show damage to the control unit. The wiring or the plug may equally be the cause.

While the finding persists, airbags and seatbelt pretensioners may not trigger in an emergency. The warning light is therefore a reason to have the system checked.

Which vehicles is the P68186640AC fitted in?

The control unit P68186640AC is fitted in these vehicles: Jeep Compass MK (2007-2010) and MK Facelift (2011-2016).

The overview shows the vehicles recorded for this part number:

• Jeep Compass MK (2007-2010)
• Jeep Compass MK Facelift (2011-2016)

Compare the part number on the label of your removed unit with this page. This only confirms that it is the right unit. Also have the fault memory read out before removing the unit, because only this log shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers P68186642AD.

How does the repair of the P68186640AC work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit P68186640AC. Next 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 the crash data and carries out a function test. Afterwards your own, repaired unit is 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 P68186640AC get to Airbag24?

You send the control unit P68186640AC as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends it back by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.