Airbag control unit with part number 68105510AE

What is the function of the airbag control unit 68105510AE?

The airbag control unit with part number 68105510AE is a central safety module specifically used in Chrysler vehicles such as the 300 LX and 300 Touring. Its primary task is to monitor the entire occupant protection system. It continuously receives and processes data from crash sensors and is responsible for precisely and rapidly deploying airbags and seatbelt pretensioners in the event of an accident.

This control unit, also known as the Airbag ECU (Electronic Control Unit) or SRS module (Supplemental Restraint System), serves as the brain of the passive safety system. It coordinates the interaction between acceleration sensors distributed throughout the vehicle and pyrotechnic actuators like airbags and seatbelt pretensioners.

Under normal operating conditions, module 68105510AE performs continuous self-tests. If it detects a system fault, it activates the airbag warning light on the instrument panel to alert the driver that the restraint system may not be functioning properly.

Why does control unit 68105510AE fail?

The most common cause of failure for control unit 68105510AE is crash data stored in its internal memory after an accident, which prevents further operation. In addition, internal electronic faults can lead to malfunctions. These include voltage issues on the circuit board, failure of SMD components such as voltage regulators or memory chips (EEPROM/Flash), as well as corrosion damage caused by moisture.

Following a collision, the control unit permanently stores non-erasable crash data. This permanent storage is a manufacturer’s safety measure designed to prevent reuse without professional inspection. As a result, the module becomes locked—even if no visible damage is present.

Another frequent reason is hardware defects on the circuit board. Overvoltage in the vehicle’s electrical system, aging processes, or thermal stress can cause individual electronic components to fail. Faulty voltage regulators, capacitors, or switching transistors then disrupt internal power supply or signal processing.

Problems with memory modules (EEPROM/Flash) can also occur, where software or configuration data becomes corrupted. In rarer cases, external factors such as moisture cause corrosion at connectors or on the circuit board, leading to contact issues and ultimately total failure.

How do you recognize a defect in 68105510AE?

A defective airbag control unit 68105510AE is primarily indicated by a constantly illuminated airbag or SRS warning light on the instrument panel. Another clear sign is that the control unit can no longer be accessed via a diagnostic tool—there is no communication. Often, specific error codes are also stored, pointing to an “internal electronic fault” or “voltage problems.”

The most definitive symptom is the persistently lit airbag indicator light. It does not turn off after starting the vehicle, signaling that the safety system has detected a critical fault and would not deploy in an emergency.

A serious symptom is complete loss of communication. When a workshop attempts to read the fault memory using a diagnostic device, no response is received from the control unit. This indicates a severe internal electronic malfunction.

If error codes are read, entries such as “internal control unit fault,” “faulty supply voltage,” or specific errors related to ignition circuits directly point to a problem within module 68105510AE that requires hardware repair.

In which vehicles is 68105510AE installed?

The airbag control unit with part number 68105510AE is specifically designed for Chrysler vehicles. At Airbag24, we primarily repair this module for models in the Chrysler 300 series based on the LX and LD platforms. Professional restoration ensures full functionality of the safety system in these vehicles.

At Airbag24, repairs for control unit 68105510AE are offered for the following Chrysler models:

Chrysler 300 LX (2004–2010)

Chrysler 300 Touring LX

Chrysler 300 Touring LD

It is crucial that the part number matches exactly to ensure full compatibility with the vehicle’s electronics, installed sensors, and airbags.

How is 68105510AE professionally repaired?

At Airbag24, repairing control unit 68105510AE follows a standardized process. After an initial visual inspection, an electronic diagnosis is performed to read error codes and crash data. Subsequently, defective components such as voltage regulators or memory chips are replaced at the circuit board level, and crash data is erased. A final test on the test bench confirms full operational capability.

After being sent to Airbag24, each control unit first undergoes a thorough visual inspection. During this step, the housing and connectors are examined for mechanical damage, corrosion, or water ingress—signs of external influences.

The next stage involves electronic analysis. Using specialized diagnostic interfaces, the fault memory is read out to identify the exact cause of the malfunction and to check whether crash data is stored in the memory.

The actual repair takes place at the component level. Technicians open the control unit and perform precision measurements on the circuit board. Defective SMD components such as resistors, MOSFETs, or voltage regulators are replaced using professional soldering techniques.

If crash data is present, it is securely and completely erased after successful technical testing and hardware repair—provided the module is otherwise technically sound.

Finally, the refurbished control unit is tested on a specially designed test bench that simulates a vehicle. Only when all functions operate flawlessly is the device approved for return shipment. We offer 2 years' statutory liability for defects on all repairs.