dAHLer BMW Engine Performance Tuning - S55

Unleash the full performance potential of your BMW with the dAHLer Engine Performance Tuning Module for S55 engines—designed for enthusiasts seeking increased horsepower, torque, and enhanced control, all while maintaining the integrity and reliability of factory systems. Developed in Switzerland and manufactured in Germany, this advanced module integrates flawlessly into the vehicle’s electrical system, allowing for true plug-and-play installation without removing the DME or compromising emissions compliance. The dAHLer tuning module is engineered for all BMW models equipped with the high-performance S55 3.0L twin-turbocharged inline-six engine. This includes the iconic BMW M3 and M4 models, among others. Power delivery is smooth, responsive, and fully compatible with all factory drive modes. With gains of up to 9 horsepower to the wheels on a stock vehicle, this module delivers real-world performance improvements while preserving everyday drivability. PLEASE READ THE INSTALLATION GUI