Under the Hood

The 135i's turbocharged inline-six makes 300 horsepower and 300 pounds-feet of torque. It works through a six-speed manual or BMW's seven-speed dual-clutch automatic. Either car hits 60 mph in about 5 seconds, BMW says. The M Sport Package adds a sport-tuned suspension with high-performance, six-piston front and two-piston rear brakes.

If that seems like too much, consider stepping down to the 230-hp, normally aspirated 128i, which is covered separately in the Cars.com Research section.

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    Children on the front passenger seat
    Should it be necessary to use a child restraint fixing system on the front passenger seat, make sure that the front and side airbags on the front passenger side are deactivated. Automatic deacti ...

    Tires
    Due to technical factors associated with their manufacture, tires do not achieve their full traction potential until after an initial breaking-in period. Drive conservatively for the first 200 mi ...

    Using this Owner's Manual
    The fastest way to find information on a particular topic is by using the index. An initial overview of the vehicle is provided in the first chapter. Additional sources of information Should yo ...