Twin-scroll turbocharging

The new four-cylinder engines also feature twin-scroll turbocharging. This means that the exhaust stream from cylinders 1 and 4, and the exhaust stream from cylinders 2 and 3, follow separate spiral-shaped paths to the turbine wheel. This reduces exhaust back-pressure at low engine rpm, allowing the energy of the exhaust gas pulses to be utilised as efficiently as possible. The result is instant throttle response and fast-revving performance which BMW drivers can instantly translate into driving pleasure.

    See also:

    Tachometer
    Always avoid engine speeds in the red warning field. In this range, the fuel supply is interrupted to protect the engine. ...

    Rear door controls
    Roller blind for the side windows Press the button. The roller blind can only be extended or retracted when the side window is closed. Roller blind for rear window Press the button. Raising ...

    For US customers
    The following only applies to vehicles owned and operated in the US. If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately i ...