BMW · MSD81.X ECU · petrol

BMW X SERIES MSD81.X tuning files

Tuning file coverage for the BMW X SERIES running the MSD81.X ECU. The matched variants sit between 306 and 306 HP from the factory. 7 distinct variants are catalogued here. It is a petrol platform, tuned for response and clean power delivery. Each file is tied to the precise software on your car and checked before it goes out.

Upload your file →All X SERIES coverage

Available solutions

What we can run on the MSD81.X for this petrol — the precise options narrow down by engine and software version.

Stage 1Stage 2Swirl Flaps OffLambda / O2OPF/GPF Off

Engine variants & ECU software

7 distinct variants for the BMW X SERIES on the MSD81.X ECU. Reference the engine and controller software when you upload.

Variant 1

ECU
Catalog engine
3000 306HP
Controller brand
SIEMENS
ECU
MSD81.X
Stock power
306 HP
Calibration
0044CC0IHD0SILE1S

Variant 2

ECU
Catalog engine
3000 306HP
Engine code
N55B30M0
Controller brand
SIEMENS
ECU
MSD81.X
Stock power
306 HP
ECU SW
6577475127
ECU HW
6577475259
Calibration
0044CC0IGE0SIDA5S

Variant 3

ECU
Catalog engine
3000 306HP
Controller brand
SIEMENS
ECU
MSD81.X
Stock power
306 HP
Calibration
0044CC0IF60SSFCA1

Variant 4

ECU
Catalog engine
3000 306HP
Controller brand
SIEMENS
ECU
MSD81.X
Stock power
306 HP
Calibration
0044CC0IJE0SIDC3S

Variant 5

ECU
Catalog engine
3000 306HP
Engine code
N55B30M0
Controller brand
SIEMENS
ECU
MSD81.X
Stock power
306 HP
ECU SW
6577475117
ECU HW
6577475255
Calibration
0044CC0IF80SIDE3S

Variant 6

ECU
Catalog engine
3000 306HP
Engine code
N55B30M0
Controller brand
SIEMENS
ECU
MSD81.X
Stock power
306 HP
ECU SW
6577475127
ECU HW
6577475259
Calibration
0044CC0IGE0SILD2S

Variant 7

ECU
Catalog engine
3000 306HP
Engine code
N54B30
Controller brand
SIEMENS
ECU
MSD81.X
Stock power
306 HP
ECU SW
6577475127
ECU HW
6577475259
Calibration
0044CC0IGE0SIDD7S

Related vehicles

Other vehicles built on the MSD81.X controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the BMW X SERIES on the MSD81.X?

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 MSD81.X ECU software on this model?

Yes — the BMW X SERIES on the MSD81.X 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 X SERIES MSD81.X ECU Tuning Files | TuningBay