Land Rover Discovery Sport L550 Transmission Control Module Unit K8D2-14C336-AB

Land Rover Discovery Sport L550 Transmission Control Module Unit K8D2-14C336-AB is an original component from the Electronic control modules and controllers group, designed for precise management of the automatic transmission in the Discovery Sport L550 model. This used controller ensures factory-standard transmission logic, maintaining full compatibility with the electrical architecture and software of the Land Rover vehicle.

Specifications and technical data

• SKU: LR125943
• Mark: Land Rover
• Condition: Used
• OEM Part Number: LR125943
• Substitutable numbers: LR125943, K8D2-14C336-AB, K8D214C336AB, K8D2-72401-AA, K8D272401AA
• Part type: Transmission Control Module
• Category: ECUs & Computer Modules

Purpose and function of the module

The presented transmission control module is responsible for coordinating the transmission's operation with other vehicle systems, such as the drivetrain, safety systems, and onboard electronics. By using an original controller, the correct gear shifting characteristics, smoothness of gear changes, and consistency with factory control maps are maintained. The component is dedicated to the Discovery Sport L550 platform, which means it is perfectly matched to the wiring harnesses, communication protocols, and software used by the Land Rover brand. In practice, this translates into stable transmission operation and a reduction in the risk of communication errors within the vehicle's network.

Benefits of using an original module

Using an original electronic control module instead of a damaged or unstable controller allows for the restoration of proper drivetrain operation. This is particularly important in vehicles equipped with advanced traction control and four-wheel-drive systems, where correct interaction between the transmission and the rest of the electronics is crucial for predictable vehicle behavior. A used OEM component from this product group is a reasonable compromise between repair costs and maintaining high quality. Factory fitment and compatibility with Land Rover software reduce the need for installation modifications and minimize the risk of compatibility issues typical of cheap aftermarket replacements.

Selection, compatibility, and interchangeable numbers

Modules from the Electronic control modules and controllers category require precise selection based on the equipment version, model year, and drivetrain configuration. The presented controller has an assigned OEM part number and associated interchangeable numbers, which facilitates verification of compatibility with a specific Discovery Sport L550 unit. Before purchasing, it is recommended to compare the markings with the currently installed module or consult a service center to confirm full compatibility. Thanks to the presence of reference numbers, it is possible to match the controller to different variants of the same platform, which is helpful during repairs on vehicles after upgrades or with different transmission configurations.

Characteristics of the used component

The offered module comes from disassembly and is classified as used, meaning it was previously operated in a vehicle. Such electronic components, when properly selected and installed, can still provide long-term and stable operation, especially when they are original Land Rover components. In many cases, this is a cost-effective solution that allows for the restoration of full transmission functionality without the need to invest in a new controller. To better understand when choosing a used module is justified, it is worth reading the guide on our blog: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Support with selection and additional information

If you are planning a comprehensive repair or upgrade of the drivetrain control area in your Land Rover and need other components from the same group, such as engine controllers, body modules, or driver assistance system controllers, check the available parts in the Land Rover electronic control modules and controllers category. For drivers considering different repair strategies while maintaining high quality of installed components, the article explaining the advantages of original parts from disassembly over cheap replacements may also be helpful: Why do original parts from disassembly fit better (and last longer) than cheap equivalents?.