Fortunately, there are aftermarket companies like AC Schnitzer that are capable of helping cars like the M135i fulfill their potential. It certainly helps that AC Schnitzer is also considered one of the finest BMW tuners in the world — yeah, these guys know what they’re doing.
For the M135i, AC Schnitzer decided to launch an upgrade program that includes performance mods, suspension upgrades, and subtle aerodynamic improvements. That’s the trifecta right there.
First off is the performance upgrade, which AC Schnitzer achieved by tweaking various components in the engine. The result is an M135i that now produces 360 horsepower without increasing the CO2 emissions of the sports hatch. Coming from the original 320 horsepower and 332 pound-feet of torque produced by the car’s 3.0-liter six-cylinder engine, the performance bump is pretty impressive, considering the CO2 levels remained the same. We’ll get you all of thee engine-upgrade details after its debut in Essen.
Moving to the suspension, AC Schnitzer installed a new spring kit that not only lowers the vehicle by 25 mm (0.98 inches) but also provides an improved balance between two key elements of the M135i: sports performance and driving comfort. A chromed "Racing" exhaust tailpipe was also installed, as well as a two-piece front spoiler, color-matched design stripes, a rear roof spoiler and a loading lip protection film make up the exterior modifications.
Finally, there are the interior upgrades, which include an aluminum Black Line gear knob or, should you opt for something a little more posh, an illuminated, leather-wrapped gear knob. Rounding out the interior upgrades for the M135i include a Black Line aluminum cover for the i-Drive, another gear knob with a digital gear display, aluminum handbrake handle with chrome accents, custom velour floor mats and an aluminum foot rest.