Airbag control unit with part number EX53-14D374-AD

What is the function of the airbag control unit EX53-14D374-AD?

The airbag control unit with part number EX53-14D374-AD is the central control module (SRS Restraint Control Module) for the passive safety systems in the Jaguar F-Type. It processes signals from crash sensors, deploys airbags and seatbelt pretensioners in the event of a collision, and stores relevant crash data in its internal memory.

This module, also known as the RCM, serves as the brain of the entire restraint system. It continuously monitors and evaluates data from acceleration and pressure sensors throughout the vehicle.

In the event of an impact, the control unit determines within milliseconds which safety devices—such as front airbags, side airbags, or seatbelt pretensioners—need to be activated to provide optimal occupant protection. After deployment, crash data, referred to as “crash data,” is permanently stored in memory, resulting in a system lockout.

Why does the EX53-14D374-AD control unit fail?

The most common cause of failure for the EX53-14D374-AD control unit is the storage of crash data following a collision, which triggers a system-wide lockout. Additionally, internal electronic faults on the circuit board can lead to malfunctions, often indicated by a lit airbag warning light.

Even after minor collisions, the control unit writes crash data into its memory. This safety feature necessitates a thorough inspection and repair of the entire SRS system. Following this process, the module becomes locked and must be professionally reset.

In rarer cases, non-collision-related defects may occur, such as failures in electronic components that result in communication issues or improper system monitoring.

The repair procedures for this part number and related variants like EX53-14D374-AC or EX53-14D374-AE are identical, as they share a similar hardware platform and exhibit the same fault patterns.

How do you recognize a defect in the EX53-14D374-AD?

A defect in the EX53-14D374-AD control unit primarily manifests as a continuously illuminated airbag warning light on the instrument cluster. Additional symptoms may include locked seatbelt systems in both front and rear seats, as well as connectivity issues during vehicle diagnostics via the OBD-II port.

The clearest indicator is the active SRS or airbag warning light, which fails to extinguish after engine start-up, signaling either a stored fault or an internal malfunction within the module.

Following a collision, seatbelt systems often become locked—a direct consequence of the seatbelt pretensioners deployed by the control unit and the stored crash data, which put the system into a secure yet immobilized state.

In cases of non-collision-related faults, it’s advisable to first inspect external components such as sensors, seatbelt pretensioners, or the seat occupancy mat. An OBD scan can provide initial clues about the root cause before considering the control unit as the source of the problem.

In which vehicles is the EX53-14D374-AD control unit installed?

The airbag control unit with part number EX53-14D374-AD is specifically designed for Jaguar models. It is exclusively used in the F-Type sports car lineup, covering both the first generation and the facelifted model.

At Airbag24, we service the EX53-14D374-AD part number, which is installed in the following Jaguar models:

Jaguar F-Type (X152 series, model years 2013–2019)

Jaguar F-Type Facelift (X152 series, model years 2019–2024)

How is the EX53-14D374-AD professionally repaired?

Professional repair is provided through a repair-and-return service, where the original control unit is refurbished. The process includes erasing stored crash data using specialized equipment, repairing any electronic faults on the circuit board, and conducting final functional tests to restore full operability.

Upon submission to Airbag24, the EX53-14D374-AD control unit undergoes a standardized repair procedure. First, a detailed analysis identifies the exact cause of the fault—whether it stems from crash data or an electronic defect.

The core of the repair involves completely removing crash data from the module’s memory, returning the unit to factory settings without requiring costly hardware replacement. Any defects in electronic components are also addressed during this process.

To ensure successful re-commissioning, it is essential that all SRS components activated during the incident—airbags, seatbelt pretensioners, and sensors—are replaced prior to installing the repaired module. The control unit should be installed last, with the battery disconnected and securely fastened before reconnecting the wiring harness. We offer 2 years' statutory liability for defects on all repairs.

What are the benefits of repairing the EX53-14D374-AD?

Repairing the original control unit is the most cost-effective and technically safest solution. It is significantly cheaper than a new part and avoids compatibility and coding issues that can arise with used modules. Additionally, the vehicle-specific programming (VIN) is preserved, and the repair is backed by 2 years’ statutory liability for defects.

A major advantage is the substantial cost savings. Repair costs are often far lower than the price of a new manufacturer‑supplied control unit. Even used parts, which are frequently still locked, can be more expensive than a professional repair.

Since the original, vehicle‑specifically programmed module is repaired, there is no need for time‑consuming reprogramming or recoding. Once correctly installed, the repaired control unit is ready to use immediately (plug-and-play).

An unprofessional intervention or the installation of an unrepaired used part can permanently damage the SRS system. Professional repair ensures that the heart of the safety system functions reliably again and is covered by 2 years’ statutory liability for defects.