Airbag control unit with part number P68164089AB

What does the airbag control unit P68164089AB do?

The airbag control unit P68164089AB is the central control unit of the restraint system (SRS) for Dodge. It evaluates the signals from the crash sensors, decides in a crash within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

In everyday use, the control unit checks sensors, wiring and firing circuits and stores detected faults in the fault memory. It reports faults via the airbag warning light in the instrument cluster, which you keep in view while driving.

After an accident, the unit stores crash data and locks itself. This response is part of the protective function of the system.

Why does the control unit P68164089AB fail?

The most common cause is that crash data was stored after an accident, even if no airbag has deployed; a standard diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and voltage spikes can also cause the failure.

Other causes at a glance:

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or a jump start

During the repair at Airbag24, the crash data is erased. The other causes are established during the check on the test bench.

How can you tell that the P68164089AB is defective?

A defect shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently, and as a fault message in the instrument cluster. In addition, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

If the warning light is on, airbags and seatbelt pretensioners may fail to deploy in an emergency. The signs do not all have to appear at once; a single one is enough to have the system checked.

Therefore have it checked promptly where the message comes from, rather than ignoring the warning light. Reading out the fault memory shows which faults the control unit has stored.

Which vehicles is the P68164089AB fitted in?

The P68164089AB is fitted in these vehicles: Dodge Ram DS/DJ/D2 (2009-2018).

The vehicles at a glance:

• Dodge Ram DS/DJ/D2 (2009-2018)

Compare the part number on the label of the removed unit with this page. This only ensures that you have the correct unit in front of you. Also have the fault memory read out beforehand, because only this log shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 0285015046, 56043128AC, 56043128AD, 68303217AA, 68303218AA, 68346712AA.

How does the repair of the P68164089AB work?

First have the fault memory read out and attach the log, then disconnect the battery and only afterwards remove the control unit. Next, create a repair order online and send in the well-packed unit. Airbag24 needs 3–4 working days in total for checking, repair and function test.

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

Afterwards your own unit comes back 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 P68164089AB get to Airbag24?

You send the control unit P68164089AB in as a parcel to Airbag24 or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Place the printed repair order in the parcel and pack the unit shockproof.