Vehicle Overview

The rear-wheel-drive BMW 1 Series enters its fifth year on the market with a few visual changes, as well as a new higher-performance version from BMW's M division, dubbed the 1 Series M. Above the entry-level 128i is the 135i, whose compact dimensions and two-door layout give it few genuine competitors. The car comes as a coupe or convertible; shoppers might cross-shop the 135i with the Nissan 370Z, Infiniti G37 coupe or top-end versions of Detroit's muscle cars.

The 128i is covered separately in Cars.com's Research section.

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    Radar sensors
    The radar sensors are located under the rear bumper. The system may not be fully functional in the following situations: Dirty or icy bumper. Stickers on the bumper. A Check Control me ...

    Programming
    General information 1. Switch on the ignition. 2. Initial setup: Press and hold the left and right button on the interior rearview mirror simultaneously for approximately 20 seconds until the L ...

    Brake assistant
    When you apply the brakes rapidly, this system automatically produces the maximum braking force boost. It thus helps to achieve the shortest possible braking distance during full braking. This ...