Airbag control unit with part number R8E2-14D374-AA

What is the function of the airbag control unit R8E2-14D374-AA?

The airbag control unit R8E2-14D374-AA is the central control module for the occupant protection system, primarily used in the Land Rover Range Rover Evoque L551. It processes signals from crash sensors to precisely deploy airbags and seatbelt pretensioners in the event of a collision, ensuring the safety of vehicle occupants.

Technically speaking, it is a complex electronic unit that continuously monitors the vehicle’s sensor data. Upon impact, the device determines within milliseconds which restraint systems need to be activated to minimize injuries.

The unit is designed specifically for the architecture of the Range Rover Evoque L551 and communicates with other control modules in the vehicle. In some cases, such as the variant for the TC23xx processor, it is tailored to handle specific datasets and sensor types.

Why does the R8E2-14D374-AA control unit fail?

The most common reason for repairing the R8E2-14D374-AA control unit is the storage of crash data after an accident. This data locks the unit’s functionality as a safety precaution. Other causes include electronic faults due to moisture or aging components, which can lead to complete failure.

After an airbag deployment, the unit permanently stores the crash data. This is a manufacturer‑specified safety feature that prevents reinstallation without professional repair. The unit becomes locked and must be repaired.

In addition to crash‑data locking, hardware defects on the circuit board may also occur. Moisture ingress—often through a leak in the vehicle—or the natural aging of electronic components like capacitors can result in total functional failure.

The control unit is also known under alternative part numbers LX7314D374AC or R8E214D374AA. Defects are identical across these variants, as they are technically closely related.

How do you recognize a fault in the R8E2-14D374-AA?

A faulty R8E2-14D374-AA airbag control unit typically manifests as a constantly illuminated airbag warning light on the instrument cluster. Additionally, it often becomes inaccessible to diagnostic tools, preventing fault analysis. Stored error codes indicating internal malfunctions or crash data are also clear indicators.

The primary and unmistakable symptom is the active airbag warning light on the dashboard, signaling to the driver that the restraint system is non‑functional and would not deploy in the event of a crash.

Another typical sign is complete loss of communication. If a workshop attempts to read the control unit via the OBD interface, no response is received—the unit is no longer reachable on the vehicle network.

If communication remains possible, specific error codes are often retrieved. These either point to an “internal fault” within the control unit itself or to “crash data stored,” making repair unavoidable.

In which vehicles is the R8E2-14D374-AA control unit installed?

The airbag control unit with part number R8E2-14D374-AA is mainly installed in Land Rover vehicles. It is found primarily in the Range Rover Evoque L551 model year 2019–2023, as well as in its facelifted version starting in 2023. Compatibility with the Range Rover Sport III (L461) is also possible.

At Airbag24, we repair this control unit for the following specific models. For absolute certainty, always verify compatibility using the Vehicle Identification Number (VIN).

Land Rover:

Range Rover Evoque (L551), model years 2019–2023

Range Rover Evoque Facelift (L551), from model year 2023 onward

Range Rover Sport III (L461) P460e PHEV (potentially compatible; VIN check recommended)

How is the R8E2-14D374-AA professionally repaired?

Repair of the R8E2-14D374-AA control unit at Airbag24 includes diagnosis and electronic hardware refurbishment. After removal and shipment, the circuit board is analyzed, defective components are replaced, and the software is restored to factory settings. We provide 2 years' statutory liability for defects on all repairs. With this control unit, erasing the crash data is often not possible. If the crash data needs to be erased, please contact us briefly before sending the unit in – we will check your part number.

The process begins in our workshop with the proper removal of the control unit, typically located beneath the center console in the Range Rover Evoque L551. The unit is then securely packaged and sent to Airbag24.

Upon arrival at Airbag24, our technicians perform a thorough analysis.

At the same time, the hardware on the circuit board is inspected. Defective components such as capacitors or damaged traces are professionally repaired or replaced. Finally, the control unit is tested on a test bench to ensure full functionality before being returned ready for use.