Airbag control unit with part number 2N1A-14B056-AC

What is the function of the airbag control unit 2N1A-14B056-AC?

The control unit 2N1A-14B056-AC is the central control module of the airbag system (SRS module) in the first-generation Ford EcoSport. It processes data from crash sensors and determines whether and when airbags and seatbelt pretensioners should be deployed. This module often bears the manufacturer’s identification 5WK43173 and uses a 95160 EEPROM memory.

As the “brain” of the passive safety system, this component is responsible for protecting occupants during a crash by activating restraint systems. It continuously monitors all connected components, including sensors, ignition circuits, and the airbag warning light.

Technical identification is provided by part number 2N1A-14B056-AC. Proper functioning of this control unit is essential for vehicle safety and a prerequisite for passing the mandatory technical inspection.

Why does the control unit 2N1A-14B056-AC fail?

The most common cause of failure is the storage of crash data after an accident, even if no airbags were deployed. This permanently locks the control unit. Other causes include internal electronic faults, recorded in the fault memory as “Internal Control Module Error,” or complete communication failure.

A key issue is the recording of crash data in the internal memory chip (EEPROM 95160). This lockout is a manufacturer‑imposed safety feature that cannot be reset through standard workshop diagnostics; it requires specialized electronic repair.

In addition, internal software errors or defects in electronic components on the circuit board can lead to malfunctions. These often manifest as the control unit becoming inaccessible via the OBD interface, making diagnosis of the safety systems impossible.

How do you recognize a defect in the airbag control unit?

The clearest sign of a malfunction is the airbag warning light (SRS lamp) remaining constantly illuminated in the instrument cluster. Communication with the control unit via a diagnostic tool is frequently lost as well. Fault memory entries such as “Crash data stored” or “internal control unit error” may also appear.

A typical symptom is that the airbag warning light fails to turn off after starting the vehicle, staying lit continuously. This indicates a critical system error and deactivation of the airbag system.

Workshops often observe that the module is no longer reachable through the OBD port. Any attempt to read or clear the fault memory fails because no connection to the control unit can be established.

In some cases, a defective airbag control unit may also cause other warning lights, such as the engine check light, to flash or illuminate intermittently.

In which vehicles is the control unit 2N1A-14B056-AC installed?

The airbag control unit with part number 2N1A-14B056-AC was specifically developed for the first-generation Ford EcoSport. At Airbag24, we repair this module for the following model series, offering a cost-effective and reliable alternative to a new unit:

Ford: EcoSport 1 (model years 2003–2007) and EcoSport 1 Facelift (model years 2007–2012)

How is the control unit 2N1A-14B056-AC professionally repaired?

After being sent to Airbag24, the control unit undergoes a professional repair process. First, an initial assessment is performed, followed by reading the internal memory. Crash data is then precisely erased, and any software errors are corrected. A final test ensures full functionality. You receive 2 years' statutory liability for defects on the repair.

The process begins after removing the control unit from the vehicle and shipping it to our workshop. Our technicians conduct visual and electronic inspections to evaluate the unit’s condition.

The core of the repair involves electronically reprocessing the memory contents. Using specialized hardware, the data stored in the 95160 EEPROM is read out. Crash records and error flags are removed at the bit level, restoring the control unit to its original factory‑clean state.

Finally, the module is tested on a simulator to confirm restored communication and the absence of internal errors. Since your original part is repaired, no re‑coding is required after reinstallation in the vehicle.