EVC THROTTLE CONTROLLER FOR BMW 5 SERIES 520D 520I N47D20 N20B20 B47D20O0 B48B20 B48D20O0 2.0L I4Modern vehicles rely on 'fly by wire' throttle technology to measure pedal pressure & position to send signals to the engine's computer and convert it to acceleration. Many of these systems have a noticeable delay. EVC throttle controllers by iDrive (rebranded as Ultimate9) reduce this lag and improve response to make the acceleration feel more responsive. Key Features: Eliminates throttle lag. Increases throttle response. Improves overall