420i 184hp Stage 1 tuning

The BMW 4 serie 420i 184hp produces 184 hp and 300 Nm as standard. The YASTUNING Stage 1 remap file takes it to 250 hp and 440 Nm, a gain of +66 hp and +140 Nm. Engine code B48B20A. ECU: Bosch MG1CS003, Bosch MG1CS201. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.