BMW · MSS50 ECU · petrol

BMW 3 SERIES MSS50 tuning files

The BMW 3 SERIES on the MSS50, mapped from stock file to finished result. The matched variants sit between 343 and 343 HP from the factory. 4 distinct variants are catalogued here. On this petrol engine the focus is sharper throttle and useful, repeatable gains. Your file is built against the exact ECU software on the car, then operator-verified.

Available solutions

What we can run on the MSS50 for this petrol — the precise options narrow down by engine and software version.

Engine variants & ECU software

4 distinct variants for the BMW 3 SERIES on the MSS50 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU
Catalog engine
3200 343HP
Generation
E46 1998-2005
Matched gains engine
M3 343
Controller brand
SIEMENS
ECU
MSS50
Stock power
343 HP
Stage 1 power
365 HP
Power increase
+22 HP (+6%)
Stock torque
365 Nm
Stage 1 torque
387 Nm
Torque increase
+22 Nm (+6%)

Variant 2

ECU
Catalog engine
3200 343HP
Generation
E46 1998-2005
Matched gains engine
M3 343
Controller brand
SIEMENS
ECU
MSS50
Stock power
343 HP
Stage 1 power
365 HP
Power increase
+22 HP (+6%)
Stock torque
365 Nm
Stage 1 torque
387 Nm
Torque increase
+22 Nm (+6%)
ECU HW
211318010402K134
Calibration
0402K134

Variant 3

ECU
Catalog engine
3200 343HP
Generation
E46 1998-2005
Matched gains engine
M3 343
Controller brand
SIEMENS
ECU
MSS50
Stock power
343 HP
Stage 1 power
365 HP
Power increase
+22 HP (+6%)
Stock torque
365 Nm
Stage 1 torque
387 Nm
Torque increase
+22 Nm (+6%)
ECU SW
14002050
ECU HW
211318010402K134
Calibration
0402K134

Variant 4

ECU
Catalog engine
3200 343HP
Generation
E46 1998-2005
Matched gains engine
M3 343
Controller brand
SIEMENS
ECU
MSS50
Stock power
343 HP
Stage 1 power
365 HP
Power increase
+22 HP (+6%)
Stock torque
365 Nm
Stage 1 torque
387 Nm
Torque increase
+22 Nm (+6%)
ECU SW
4002050
ECU HW
211318010402GN10
Calibration
0402GN10

Related vehicles

Other vehicles built on the MSS50 controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the BMW 3 SERIES on the MSS50?

Stage 1, Stage 2, Swirl Flaps Off, Lambda / O2, OPF/GPF Off. The exact set depends on the specific engine and software version.

Do you cover the MSS50 ECU software on this model?

Yes — the BMW 3 SERIES on the MSS50 ECU is part of the catalog. Upload your original file and it is matched to the right calibration before any work is done.

How is the file delivered?

Through the TuningBay workflow with operator validation and one safe, sensible result per job. Files we deliver, we stand behind.

BMW 3 SERIES MSS50 ECU Tuning Files | TuningBay