BMW · MG1CS003 ECU · petrol

BMW X3 MG1CS003 tuning files

The BMW X3 on the MG1CS003, mapped from stock file to finished result. Stock output across the matched variants spans 184–184 HP. There are 3 distinct variants on file for this combination. On this petrol engine the focus is sharper throttle and useful, repeatable gains. Every file is matched to the exact calibration on your vehicle and signed off by an operator.

Upload your file →All X3 coverage

Available solutions

Solutions that apply to the MG1CS003 on this petrol platform. The exact set depends on the specific engine and software version.

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

Engine variants & ECU software

3 distinct variants for the BMW X3 on the MG1CS003 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 2000 184HP
Engine code: B48B20M0
Controller brand: BOSCH
ECU: MG1CS003
Stock power: 184 HP
ECU SW: FFFFFFFFFFFFFF
ECU HW: 80808000010001
SW upgrade: FFFFFFFFFFFFFF
Calibration: 80808000010001_FFFFFFFFFFFFFF_FFFFFFFFFFFFFF

Variant 2

ECU

Catalog engine: 2000 184HP
Engine code: B48B20M0
Controller brand: BOSCH
ECU: MG1CS003
Stock power: 184 HP
ECU SW: FFFFFFFFFFFFFF
ECU HW: 01000100001021
SW upgrade: FFFFFFFFFFFFFF
Calibration: 01000100001021_FFFFFFFFFFFFFF_FFFFFFFFFFFFFF

Variant 3

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003
Stock power: 184 HP

Related vehicles

Other vehicles built on the MG1CS003 controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the BMW X3 on the MG1CS003?

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 MG1CS003 ECU software on this model?

Yes — the BMW X3 on the MG1CS003 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.