Q21 Flasher

Q21 Flasher connects your iPhone directly to selected BMW Group vehicles, including BMW, MINI and Rolls-Royce, using compatible diagnostic adapters. The app is designed to read and flash supported engine and transmission control units and to install vehicle- and control-unit-specific calibrations. Depending on the vehicle, control unit and enabled feature set, available calibrations can adjust power delivery, torque characteristics, throttle response and transmission shift behavior. This includes supported engine performance upgrades and transmission control unit optimizations. Depending on the vehicle, connected hardware and permissions assigned to the account, available features may include: - Identifying the vehicle and its control units - Flashing supported engine and transmission control units with provided stock or optimized data sets - Applying vehicle- and control-unit-specific calibrations - Reading, deleting and evaluating fault memory - Viewing and recording live data - Running supported adaptations and actuator tests - Viewing vehicle and operation history in the user's account Available functions are shown after sign-in based on the detected vehicle, connected hardware and account permissions. Flashing and calibration changes can affect power, torque, fuel consumption, emissions, noise and the vehicle's approval for use on public roads. Users are responsible for verifying technical and legal suitability for the vehicle and intended use. Q21 Flasher is not intended to circumvent emissions, safety or vehicle approval requirements. Use the app only while the vehicle is safely parked, follow all displayed instructions and maintain stable power and connectivity throughout a flash operation. An interruption may prevent the control unit from functioning correctly. A Q21 account, internet access, supported hardware and, depending on the function, assigned access rights are required.