BMW · MS43 ECU · petrol

BMW 5 SERIES MS43 tuning files

Everything we work with on the BMW 5 SERIES fitted with the MS43. Across the matched variants stock power runs from 192 to 231 HP. 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 5 SERIES coverage

Available solutions

What we can run on the MS43 for this petrol — the precise options narrow down by engine and software version.

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

Engine variants & ECU software

25 distinct variants for the BMW 5 SERIES on the MS43 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 530i 3000 231HP
Engine code: M54B30
Controller brand: SIEMENS
ECU: MS43
Stock power: 231 HP
SW upgrade: B137J54G
Calibration: B137J54G

Variant 2

ECU

Catalog engine: 530i 3000 231HP
Engine code: M54B30
Controller brand: SIEMENS
ECU: MS43
Stock power: 231 HP
SW upgrade: B137J54F
Calibration: B137J54F

Variant 3

ECU

Catalog engine: 530i 3000 231HP
Engine code: M54B30
Controller brand: SIEMENS
ECU: MS43
Stock power: 231 HP
SW upgrade: C566J50F
Calibration: C566J50F

Variant 4

ECU

Catalog engine: 530i 3000 231HP
Controller brand: SIEMENS
ECU: MS43
Stock power: 231 HP
SW upgrade: C155750G
Calibration: C155750G

Variant 5

ECU

Catalog engine: 530i 3000 231HP
Controller brand: SIEMENS
ECU: MS43
Stock power: 231 HP
SW upgrade: C155M54G
Calibration: C155M54G

Variant 6

ECU

Catalog engine: 525i 2500 192HP
Engine code: M54B25
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C2568528
Calibration: C2568528

Variant 7

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256852V
Calibration: C256852V

Variant 8

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256852G
Calibration: C256852G

Variant 9

ECU

Catalog engine: 525i 2500 192HP
Engine code: M54B25
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256C52F
Calibration: C256C52F

Variant 10

ECU

Catalog engine: 525i 2500 192HP
Engine code: M54B25
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256C50G
Calibration: C256C50G

Variant 11

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C356852F
Calibration: C356852F

Variant 12

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256K528
Calibration: C256K528

Variant 13

ECU

Catalog engine: 525i 2500 192HP
Engine code: M54B25
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C356852D
Calibration: C356852D

Variant 14

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256C528
Calibration: C256C528

Variant 15

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C356C508
Calibration: C356C508

Variant 16

ECU

Catalog engine: 525i 2500 192HP
Engine code: M54B25
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256C52D
Calibration: C256C52D

Variant 17

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256C52C
Calibration: C256C52C

Variant 18

ECU

Catalog engine: 525i 2500 192HP
Engine code: M54B25
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C3568528
Calibration: C3568528

Variant 19

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C356C50C
Calibration: C356C50C

Variant 20

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C356C52D
Calibration: C356C52D

Variant 21

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256C50C
Calibration: C256C50C

Variant 22

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256C52G
Calibration: C256C52G

Variant 23

ECU

Catalog engine: 525i 2500 192HP
Engine code: M54B25
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256850F
Calibration: C256850F

Variant 24

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C256850G
Calibration: C256850G

Variant 25

ECU

Catalog engine: 525i 2500 192HP
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MS43
Stock power: 192 HP
Stage 1 power: 205 HP
Power increase: +13 HP (+7%)
Stock torque: 245 Nm
Stage 1 torque: 267 Nm
Torque increase: +22 Nm (+9%)
SW upgrade: C356C52V
Calibration: C356C52V

Related vehicles

Other vehicles built on the MS43 controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the BMW 5 SERIES on the MS43?

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 MS43 ECU software on this model?

Yes — the BMW 5 SERIES on the MS43 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.