BMW · MG1CS003 DME_840 ECU · petrol

BMW X3 MG1CS003 DME_840 tuning files

Everything we work with on the BMW X3 fitted with the MG1CS003 DME_840. The matched variants sit between 184 and 184 HP from the factory. 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.

Upload your file →All X3 coverage

Available solutions

Applicable work for the MG1CS003 DME_840 on this petrol. The available set firms up once the exact engine and software are known.

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

Engine variants & ECU software

16 distinct variants for the BMW X3 on the MG1CS003 DME_840 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081501D03
ECU HW: 00003080000120
SW upgrade: 00005093501D0D
Calibration: 00003080000120_00003081501D03_00005093501D0D

Variant 2

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081501D03
ECU HW: 00003080000120
SW upgrade: 0000482D501D11
Calibration: 00003080000120_00003081501D03_0000482D501D11

Variant 3

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 000030815A1406
ECU HW: 00003080000120
SW upgrade: 000049465A1433
Calibration: 00003080000120_000030815A1406_000049465A1433

Variant 4

ECU

Catalog engine: 2000 184HP
Engine code: B48B20M0
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081501D03
ECU HW: 00003080000120
SW upgrade: 0000755C501DA3
Calibration: 00003080000120_00003081501D03_0000755C501DA3

Variant 5

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 000030811E0507
ECU HW: 0000308000011E
SW upgrade: 000043F01E0508
Calibration: 0000308000011E_000030811E0507_000043F01E0508

Variant 6

ECU

Catalog engine: 2000 184HP
Engine code: B48B20M0
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081501D05
ECU HW: 00003080000120
SW upgrade: 00007558501DA4
Calibration: 00003080000120_00003081501D05_00007558501DA4

Variant 7

ECU

Catalog engine: 2000 184HP
Engine code: B48B20M0
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081501D03
ECU HW: 00003080000120
SW upgrade: 00007558501D99
Calibration: 00003080000120_00003081501D03_00007558501D99

Variant 8

ECU

Catalog engine: 2000 184HP
Engine code: B48B20M0
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081460D02
ECU HW: 00003080000120
SW upgrade: 00003E16460D02

Variant 9

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 000030815A1409
ECU HW: 00003080000120
SW upgrade: 000049465A1436
Calibration: 00003080000120_000030815A1409_000049465A1436

Variant 10

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081280503
ECU HW: 00003080000120
SW upgrade: 000043F4280508
Calibration: 00003080000120_00003081280503_000043F4280508

Variant 11

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081280503
ECU HW: 00003080000120
SW upgrade: 00004928280508
Calibration: 00003080000120_00003081280503_00004928280508

Variant 12

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081501D07
ECU HW: 00003080000120
SW upgrade: 000043EC501DA7
Calibration: 00003080000120_00003081501D07_000043EC501DA7

Variant 13

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081501D02
ECU HW: 00003080000120
SW upgrade: 00005093501D05
Calibration: 00003080000120_00003081501D02_00005093501D05

Variant 14

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 000030815A5005
ECU HW: 00003080000A22
SW upgrade: 000050975A5001
Calibration: 00003080000A22_000030815A5005_000050975A5001

Variant 15

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 00003081501D03
ECU HW: 00003080000120
SW upgrade: 00004FEC501D33
Calibration: 00003080000120_00003081501D03_00004FEC501D33

Variant 16

ECU

Catalog engine: 2000 184HP
Controller brand: BOSCH
ECU: MG1CS003 DME_840
Stock power: 184 HP
ECU SW: 000030815A5005
ECU HW: 00003080000A22
SW upgrade: 00004FB45A5001
Calibration: 00003080000A22_000030815A5005_00004FB45A5001

Related vehicles

Other vehicles built on the MG1CS003 DME_840 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 DME_840?

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 DME_840 ECU software on this model?

Yes — the BMW X3 on the MG1CS003 DME_840 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.