See also:

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 abo ...

Automatic deactivation
In certain situations, the Automatic Engine Start/ Stop Function is deactivated automatically for safety reasons, such as when the driver is detected to be absent. Malfunction The automatic engin ...

Eight-speed automatic transmission: sporty, fuel-efficient, and unique in a compact car
The standard six-speed manual petrol and diesel versions of the new BMW 1-Series offer efficient power transmission and precise gear changes. The BMW 1-Series is also the only compact car also ava ...