When you bring your vehicle to WestTuned Car Mechanic Center, you can rest easy knowing that your vehicle is in professional hands.
135i | 306 HP -> 0 HP
At Westtuned, we specialize in high-performance BMW 1 Series 135i tuning software. Our custom ECU solutions unlock the full potential of your engine, delivering sharper throttle response, stronger mid-range torque, and a more aggressive power curve — all while maintaining OEM-level drivability and reliability.
Every Westtuned calibration is developed using live dynamometer testing, targeting safe air-fuel ratios and optimised boost levels throughout the full RPM range. Our Stage 1 solutions are built to be reliable for daily driving as well as track day use.
Our calibrations are compatible with both stock vehicles and those equipped with aftermarket hardware — intakes, intercoolers, exhausts and more — ensuring maximum performance at every stage of modification.
Choose Westtuned for:
Don't let factory software limit what your BMW 1 Series 135i can do. Trust Westtuned to deliver the performance gains your engine deserves.
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