Airbag control unit with part number ET76-14B321-CF

What is the function of the Airbag Control Unit ET76-14B321-CF?

The Airbag Control Unit ET76-14B321-CF is the central safety module (SRS module) for the first-generation Ford Tourneo Courier. It continuously monitors the sensors of the restraint system, processes their data, and, in the event of a crash, controls the deployment of airbags and seatbelt pretensioners to protect occupants.

As the “brain” of the passive safety system, this module interprets signals from the vehicle’s acceleration and pressure sensors. Upon detecting a collision that exceeds predefined thresholds, it sends critical ignition pulses to the respective airbag modules and pyrotechnic seatbelt pretensioners within milliseconds.

In addition, the control unit performs a self-test at every vehicle start-up and continuously monitors all connected components for proper functionality. Technically, it is often associated with alternative Ford part numbers such as 2T1T-14B321-AC or reference number 285001955, yet it fulfills the same critical role within the overall system.

Why does the ET76-14B321-CF control unit fail?

The most common cause of failure for the ET76-14B321-CF control unit is the storage of crash data after an accident. This data permanently locks the module and triggers the airbag warning light. Other causes include internal electronic faults on the circuit board, sensor malfunctions, or defective components.

Following a collision—even a minor one—the control unit irrevocably writes crash data into its internal memory (EEPROM chip). This safeguard prevents re‑activation and locks the entire system until the data is professionally erased. The unit is then considered defective, even though the hardware itself is often undamaged.

Besides crash‑data issues, purely electronic defects can also occur. These include faulty capacitors, resistors, or cold solder joints on the circuit board, leading to intermittent or permanent malfunctions. Closely related part numbers like ET76-14B321-CG or ET76-14B321-BF exhibit identical fault patterns and repair procedures.

How do you recognize a defect in the ET76-14B321-CF control unit?

A defect in the ET76-14B321-CF airbag control unit primarily manifests as a permanently illuminated airbag warning light on the instrument cluster. Often, the control unit can no longer be accessed via OBD diagnostics, or error codes indicating an internal fault or stored crash data are displayed.

The most obvious symptom is the persistently lit airbag check light (SRS light), which fails to extinguish even after restarting the engine. This indicates that the restraint system is not operational and would not deploy in the event of a crash.

Another clear sign is when the diagnostic tool cannot establish communication with the airbag control unit or displays specific error codes. Common messages indicate “internal control unit error” or “crash event stored,” making repair unavoidable.

In which vehicles is the ET76-14B321-CF control unit installed?

The airbag control unit with part number ET76-14B321-CF is mainly used in Ford vehicles. It is specifically designed for models such as the Ford Tourneo Courier and the first-generation Ford Transit Courier, covering various model years and facelifts.

At Airbag24, we repair the ET76-14B321-CF part number for the following models:

Ford Tourneo Courier 1 (model years 2014–2018)

Ford Tourneo Courier 1 Facelift (model years 2018–2023)

Ford Transit Courier 1 (model years 2014–2023)

How is the ET76-14B321-CF part number repaired?

Repair of the ET76-14B321-CF control unit begins with professional removal and shipment to Airbag24. Our technicians conduct a thorough analysis, erase stored crash data from the EEPROM chip, fix any electronic faults, and perform a comprehensive functional test afterward. We provide 2 years' statutory liability for defects on every repair.

Once the removed control unit arrives at Airbag24, a professional diagnosis determines the exact cause of the fault. In most cases, the core of the repair involves erasing the stored crash data by reprogramming the EEPROM chip or microcontroller. This reset service restores the device to its factory condition.

If an electronic fault is detected, additional defective components—such as capacitors or resistors on the circuit board—are replaced with new, high-quality parts. After completion, each control unit undergoes an extensive functional test to ensure seamless communication with the vehicle and full operability.