Airbag control unit with part number P68186643AC

What does the airbag control unit P68186643AC do?

The airbag control unit P68186643AC is the central control unit of the restraint system (SRS) in Jeep. It evaluates the signals from the crash sensors, decides within milliseconds in a crash whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster. This way the fault remains visible to the driver.

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

Why does the control unit P68186643AC fail?

The most common cause is crash data stored after an accident, even if no airbag has fired at all; a normal diagnostic tool cannot erase it. In addition, aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start, can be considered.

Crash data stays in the memory until it is specifically removed. That is why the fault can also appear long after the accident.

Electronics age, solder joints can go cold, and moisture attacks contacts. Voltage spikes put additional stress on the components.

How can you tell that the P68186643AC is defective?

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

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. Have the display checked promptly.

The light shows the defect as soon as the control unit detects it. It is therefore worth looking into straight away.

Which vehicles is the P68186643AC fitted in?

The P68186643AC is fitted in these vehicles: Jeep Compass MK (2007-2010) and MK Facelift (2011-2016).

The list shows the vehicles stored for this control unit.

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

Two steps help with the comparison. Compare the part number on the label of the removed unit with this page; this only confirms that it is the correct unit. Have the fault memory read out beforehand, because only the result 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 P68186642AD.

How does the repair of the P68186643AC work?

First have the fault memory 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 in the well-packed unit. Checking, repair and function test at Airbag24 usually take 3–4 working days.

This sequence is binding for safety reasons. The control unit is only removed once the battery has been disconnected.

At Airbag24, the unit is examined on the test bench, and defective components are replaced where necessary. Airbag24 erases stored crash data during the repair, followed by a function test, and your own unit is sent 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 P68186643AC get to Airbag24?

You send the unit as a parcel or arrange a UPS collection for an extra charge. After the repair, your own unit comes back to you by UPS.

Enclose the printed repair order in the parcel and pack the control unit shockproof.