523i 170hp Stage 1 tuning
The BMW 5 serie 523i 170hp produces 170 hp and 245 Nm as standard. The YASTUNING Stage 1 remap file takes it to 187 hp and 272 Nm, a gain of +17 hp and +27 Nm. Engine code 256S3. ECU: Siemens/Continental MS41, Siemens/Continental MS42, Siemens/Continental MS43. The file is checksum-corrected and reviewed by an experienced calibrator within factory component tolerances.
Engine specifications
- Engine code
- 256S3
- Fuel
- Petrol
- Displacement
- 2495 cc
- Compression
- 10.5 : 1
- Bore × Stroke
- 84.0 X 75.0 mm
- ECU
- Siemens/Continental MS41, Siemens/Continental MS42, Siemens/Continental MS43
- Method
- Chiptuning
Available options
Software options we can include with the BMW 5 serie 523i 170hp file on request.
- DECAT
- FLAPS
- Vmax
Supported read methods
Tools known to read and write this ECU. Send the stock file from any of them and we return the tuned file in the same format.
- Alientech KESSv2
- Autotuner
- CMDFlash
- New Genius