Airbag control unit with part number 68405565AB

What is the Airbag Control Unit 68405565AB?

The airbag control unit with part number 68405565AB, also known as 68405565AC, is the central control module for the Supplemental Restraint System (SRS) in certain Chrysler models such as the Pacifica and Voyager. It is responsible for storing crash data after an accident and, in the event of a serious collision, deploying the airbags and seatbelt pretensioners.

This control unit continuously processes data from various crash sensors throughout the vehicle. In the event of a collision, it determines within milliseconds which restraint systems need to be activated to provide optimal protection for occupants.

Following an accident, the relevant data—known as the “crash event”—is permanently recorded in the device’s internal memory. This locks the control unit and prevents re‑activation until professional repair has been performed.

Why does the 68405565AB control unit fail?

The most common cause of failure for the 68405565AB control unit is stored crash data following an accident, which locks the system. Other issues arise from internal electronic malfunctions, water damage, overvoltage in the vehicle’s electrical system, or physical damage to wiring and connectors. Repair addresses these hardware‑related causes.

Storing crash data after a collision is an intentional feature. However, the system must be reset by a qualified specialist to restore full functionality to the airbag system. Simply clearing the fault memory using a diagnostic tool is insufficient.

External factors such as moisture ingress can lead to corrosion on the circuit board and cause short circuits. Similarly, voltage fluctuations or jump-starting with incorrect polarity can damage sensitive electronic components inside the control unit.

How do you recognize a defect in the 68405565AB?

A defective 68405565AB airbag control unit primarily manifests as a constantly illuminated or flashing SRS warning light on the instrument cluster. Often, communication with the control unit via an OBD diagnostic tool is also impossible, displaying error codes such as 65535 (internal error) that cannot be cleared.

The most noticeable symptom is the active airbag warning light, which remains on even when the engine is running. This indicates that the entire restraint system—including all airbags—is disabled and will not function in the event of a crash.

During diagnostics at a workshop, it often becomes apparent that the control unit is no longer responsive. Stored fault codes, particularly those indicating an internal malfunction, cannot be erased, suggesting either a post‑crash lockout or a severe hardware failure.

In some cases, specific messages may appear on the display—for example, an indication related to the fuel shut-off valve—which indirectly points to a fault in the SRS system.

In which vehicles is 68405565AB installed?

The 68405565AB airbag control unit is specifically fitted in several newer Chrysler models, notably the Chrysler Pacifica and Chrysler Voyager across their various generations and trims. Repair restores full functionality of the safety system in these vehicles.

At Airbag24, we repair the control unit with part numbers 68405565AB and its related number 68405565AC for the following models:

Chrysler Pacifica RU (model years 2016–2020), including the RU facelift (from 2020 onward)

Chrysler Pacifica WL

Chrysler Voyager AS

Chrysler Voyager GS

How does repair work at Airbag24?

The repair process at Airbag24 begins with the submission of the removed 68405565AB control unit. Our technicians perform a systematic analysis, erase stored crash data, replace faulty electronic components, and conduct a final functional test. All repairs come with 2 years' statutory liability for defects.

Before removing the control unit, a specialized workshop should confirm via diagnostics that the issue truly lies within the unit itself. This avoids unnecessary costs and effort.

Upon receipt at Airbag24, the device undergoes thorough inspection, focusing on eliminating the root cause—whether it’s erasing crash data at the chip level or replacing damaged components on the circuit board.

After successful restoration, the control unit is tested to ensure full operational capability. It can then be reinstalled in the vehicle using a simple plug‑and‑play procedure, without requiring time‑consuming reprogramming.