Q21 Flasher

Q21 Flasher connects an Android phone or tablet directly to selected BMW Group vehicles, including BMW, MINI and Rolls-Royce Motor Cars, using compatible diagnostic adapters. The app is designed flash supported engine and transmission control units and to install vehicle- and control-unit-specific tunes.

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 tunes
- 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 and account. Previously acquired cross-platform access rights can be used with the same account.

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.