Airbag control unit with part number GX73-14D374-AH

What is the function of the airbag control unit GX73-14D374-AH?

The airbag control unit with part number GX73-14D374-AH is a central safety module developed by Jaguar in collaboration with Bosch for the Jaguar XE (X760). It continuously monitors all sensors of the restraint system, evaluates crash data in the event of an accident, and controls the activation of airbags and seatbelt pretensioners.

As an SRS control unit (Supplemental Restraint System), this component serves as the brain of the vehicle’s passive safety system. It collects and processes signals from acceleration and pressure sensors to detect the severity and type of a collision within milliseconds.

Based on this analysis, the control unit makes the critical decision about which restraint devices—such as front, side, or head airbags, as well as pyrotechnic seatbelt pretensioners—should be deployed to provide optimal protection for occupants.

Why does the GX73-14D374-AH control unit fail?

The most common cause of failure for the GX73-14D374-AH control unit is the storage of crash data after an accident, which results in the module being locked. In addition, internal electronic malfunctions or component defects can lead to total failure or malfunctions that necessitate repair.

After airbags or seatbelt pretensioners are deployed, the control unit permanently stores so‑called crash data. This is a manufacturer‑imposed safety measure that locks the module, preventing further use without professional reconditioning.

Another reason for failures is purely electronic issues. These may include cold solder joints, defective processors, or memory chips (EEPROM) that cause communication problems or internal error messages.

It’s important to note that this control unit is also known under alternative part numbers. These include the Bosch number 0285013129, as well as Jaguar variants such as LX73-14D374-AC and other suffixes like -AE, -AG, -AJ, or -AK. A fault with any of these numbers often manifests through identical symptoms.

How do you recognize a defect in the GX73-14D374-AH?

A defect in the GX73-14D374-AH airbag control unit primarily shows up as the airbag warning light remaining constantly illuminated on the Jaguar XE’s dashboard. Additional signs include specific error messages such as “Airbag internal error” or a workshop’s inability to access the control unit via diagnostic equipment.

The clearest symptom is the airbag warning light that fails to turn off after starting the vehicle. In some cases, the light may only illuminate sporadically, indicating an emerging fault.

A more serious sign is complete loss of communication. If a diagnostic tool cannot establish a connection with the SRS module, it often points to an internal defect in the control unit.

Following an accident where airbags have deployed, the control unit becomes locked. At that point, error codes may no longer be readable because the software is disabled. Messages displayed on the screen, such as “Refer to the manual,” can also indicate a problem with the airbag system.

In which vehicles is the GX73-14D374-AH installed?

The GX73-14D374-AH airbag control unit was specifically designed for the Jaguar XE model range. It is found both in the original X760 model and in the facelifted version. Repair is possible for both variants of this series, offering a cost-effective alternative to purchasing a new unit.

At Airbag24, we repair the GX73-14D374-AH control unit as well as compatible variants for the following Jaguar models:

Jaguar XE (X760) (model years 2015–2019)

Jaguar XE (X760 Facelift) (model years 2019–2024)

How is the GX73-14D374-AH professionally repaired?

Professional repair at Airbag24 is a purely electronic process. Following an initial inspection, stored crash data is erased, defective components on the circuit board are replaced, and damaged traces are restored. A final functional test ensures full operability, backed by 2 years' statutory liability for defects.

Before removal, a qualified workshop should read out the fault memory to confirm that the defect truly originates from the control unit. Providing the test report facilitates quick and targeted repairs.

After sending the unit to Airbag24, a detailed diagnosis is performed using state-of-the-art testing systems. Based on this analysis, the actual restoration takes place. This is not merely software erasure but a thorough repair at the component level.

The technicians erase crash data, replace faulty hardware components when necessary, and restore the software to its factory settings. Upon successful repair and verification, the control unit is returned to you ready for installation, functioning just like a new part.