Airbag control unit with part number 68139317AC

What is the function of the airbag control unit 68139317AC?

The airbag control unit with part number 68139317AC is the central control module of the passive safety system in the Fiat Freemont 345. Its primary task is to process data from acceleration and pressure sensors, ensuring that airbags and seatbelt pretensioners are deployed precisely and at the right moment in the event of a crash.

The unit continuously monitors all components connected to the restraint system, including front and side airbags, seatbelt pretensioners, and crash sensors strategically positioned throughout the vehicle body.

If the control unit detects, based on sensor data, a collision exceeding a specific threshold, it sends ignition signals to the corresponding airbag modules and seatbelt pretensioners within milliseconds. This rapid response is crucial for providing optimal protection to occupants.

Why does the airbag control unit 68139317AC fail?

The most common cause of failure for control unit 68139317AC is the storage of crash data after an accident, which results in the unit being locked. Other reasons include internal electronic defects in circuit board components, as well as damage caused by moisture ingress leading to corrosion and short circuits.

After an airbag deployment, the control unit permanently writes crash data into its internal memory. This lockout is a manufacturer‑imposed safety feature designed to prevent reuse without professional diagnostics. A repair resets this data and restores full functionality.

Even without an accident, electronic components such as processors, memory chips, or voltage regulators on the circuit board may fail. This leads to an “internal control unit error,” often occurring without any external influence and requiring professional servicing.

Water damage is also a potential cause. Ingressing moisture can corrode sensitive traces and solder joints, causing short circuits that disable the unit.

How do you recognize a fault in control unit 68139317AC?

A fault in control unit 68139317AC typically manifests as a constantly illuminated airbag warning light on the instrument cluster. Often, diagnostic tools can no longer communicate with the module, or specific error codes such as “Internal Control Unit Error” are stored.

The clearest indication is the red airbag warning light that fails to turn off after the engine starts. This signals a critical safety‑system malfunction that requires immediate inspection.

Another symptom is complete loss of communication. If a workshop attempts to read the fault memory, the diagnostic tool receives no response from the airbag control unit, indicating a severe internal hardware failure.

In other cases, communication may still be possible, but error codes remain logged—directly pointing to the control unit itself. Such errors cannot be cleared and necessitate either repair or replacement of the unit.

In which vehicles is control unit 68139317AC installed?

The airbag control unit with part number 68139317AC is specifically designed for the Fiat Freemont model series 345. It was fitted as an original equipment part in vehicles of this series during the production period from 2011 to 2016. Repairs are available for all variants of this model.

At Airbag24, we specialize in repairing airbag control units and service part number 68139317AC for the following vehicle model:

Fiat Freemont 345 (model years 2011–2016)

What are the benefits of repairing 68139317AC?

The key advantage of repair is substantial cost savings—up to €800 compared to purchasing a new OEM part. Additionally, there’s no need for time‑consuming re‑coding, as the repaired original unit retains its vehicle‑specific configuration and is ready to use immediately (plug-and-play).

A new airbag control unit often comes with very high costs. Repair offers an economically sensible alternative without compromising safety.

Since the original control unit is refurbished, all vehicle‑specific data and configurations remain intact. After repair, the unit can simply be reinstalled and function right away. By contrast, a new part would require expensive programming at an authorized service center.

Repair also represents a sustainable solution, conserving valuable electronic resources and reducing e‑waste. With 2 years’ statutory liability for defects on the work performed, you receive a safe and reliable outcome.

How is the 68139317AC professionally repaired?

Professional repair at Airbag24 includes a detailed electronic analysis, proper resetting of stored crash data, and replacement of defective components. The control unit then undergoes rigorous functional testing to ensure full safety and reliability, backed by 2 years’ statutory liability for defects.

After you send the removed control unit to Airbag24, it goes through a standardized repair process. First, the fault memory is read to verify the reported malfunction.

Depending on the nature of the fault, the crash data is erased from the memory chip or repairs are performed at the component level, replacing faulty parts with new, high-quality components.

Finally, the control unit’s functionality is simulated and tested on a specialized test bench. Only once all functions have been confirmed to operate flawlessly is the device cleared for return shipment. We provide 2 years' statutory liability for defects on every repair.