Twin-scroll turbocharging

BMW 3 Series / Overview / 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:

    Malfunctions
    Steering wheel vibration Frequent activation of the steering wheel vibration causes the system to overheat. This causes Active Blind Spot Detection to become deactivated. Let the system cool an ...

    Visual warning
    The approach of the vehicle to an object can be shown on the Control Display. Objects that are farther away are displayed on the Control Display before a signal tone sounds. A display appears a ...

    Safety
    Besides options like lane departure warning, the 5 Series comes equipped with a suite of side curtain airbags and front-seat side-impact airbags. Rear seat-mounted airbags can be ordered as a $385 ...