The selector plug is a component within the gearbox assembly of the Defender 90, used to seal apertures in the gearbox casing associated with the gear selector mechanism. It prevents oil leakage and ingress of contaminants at these points. A worn or missing plug can result in gearbox oil loss, external contamination entry, and potential damage to selector forks or internal shift components. Key Features Designed to seal selector-related ports in the gearbox casing to OEM specification Correct fitment ensures oil retention and excludes dirt and moisture from the selector mechanism Supplied as a direct OEM replacement under part number UKC75L Inspect the surrounding casing threads or bore for wear when replacing; check for associated oil seepage from nearby selector shaft seals Vehicle Fitment This part is applicable to the Land Rover Defender 90 across applicable model years; verify against your chassis number and gearbox type before ordering. Not sure about fitment? Feel free to get in touch at [email protected]