BMW · MSD81 ECU · petrol

BMW 5 SERIES MSD81 tuning files

BMW 5 SERIES on the MSD81: matched, calibrated and delivered with care. The matched variants sit between 170 and 306 HP from the factory. 19 distinct variants are catalogued here. Petrol calibration here is about crisp response and a result that holds up day to day. 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

Solutions that apply to the MSD81 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

19 distinct variants for the BMW 5 SERIES on the MSD81 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 3000 306HP
Engine code: N54B30O0
Controller brand: SIEMENS
ECU: MSD81
Stock power: 306 HP
ECU SW: 6577475147
ECU HW: 6577475271
SW upgrade: C160568
Calibration: C160568

Variant 2

ECU

Catalog engine: 3000 218HP
Engine code: N55B30M0
Controller brand: SIEMENS
ECU: MSD81
Stock power: 218 HP
SW upgrade: CT22220
Calibration: CT22220

Variant 3

ECU

Catalog engine: 3000 218HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 218 HP
SW upgrade: 0044CC0IGD0SIGY5S
Calibration: 0044CC0IGD0SIGY5S

Variant 4

ECU

Catalog engine: 3000 218HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 218 HP
SW upgrade: 0044CC0IGD0SIGKAS
Calibration: 0044CC0IGD0SIGKAS

Variant 5

ECU

Catalog engine: 3000 218HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 218 HP
SW upgrade: 0044CC0IGD0SICQ4S
Calibration: 0044CC0IGD0SICQ4S

Variant 6

ECU

Catalog engine: 3000 218HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 218 HP
SW upgrade: 0044CC0IGD0SIBT5S
Calibration: 0044CC0IGD0SIBT5S

Variant 7

ECU

Catalog engine: 3000 218HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 218 HP
SW upgrade: 0044CC0IGD0SIGA2S
Calibration: 0044CC0IGD0SIGA2S

Variant 8

ECU

Catalog engine: 3000 218HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 218 HP

Variant 9

ECU

Catalog engine: 3000 218HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 218 HP
SW upgrade: 0044CC0IGD0SICC5S
Calibration: 0044CC0IGD0SICC5S

Variant 10

ECU

Catalog engine: 2500 192HP
Engine code: M54B25
Generation: E6x 2003-2010
Matched gains engine: 525i 192
Controller brand: SIEMENS
ECU: MSD81
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%)
ECU HW: 6577475205
SW upgrade: CT77047
Calibration: CT77047

Variant 11

ECU

Catalog engine: 2500 190HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 190 HP
SW upgrade: 0000000
Calibration: 0000000

Variant 12

ECU

Catalog engine: 2500 190HP
Engine code: N53B25U0
Controller brand: SIEMENS
ECU: MSD81
Stock power: 190 HP
ECU SW: 475207
ECU HW: 6577
SW upgrade: 0044CC0IHD0SIKJ4S
Calibration: 0044CC0IHD0SIKJ4S

Variant 13

ECU

Catalog engine: 2500 190HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 190 HP
SW upgrade: 0044CC0IHD0SIKL7S
Calibration: 0044CC0IHD0SIKL7S

Variant 14

ECU

Catalog engine: 2000 170HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 170 HP
SW upgrade: 0044RD0QHC0SQDO5S
Calibration: 0044RD0QHC0SQDO5S

Variant 15

ECU

Catalog engine: 2000 170HP
Engine code: N43B20O0
Controller brand: SIEMENS
ECU: MSD81
Stock power: 170 HP
ECU SW: 6577475128
ECU HW: 6577475202
SW upgrade: A428002
Calibration: A428002

Variant 16

ECU

Catalog engine: 2000 170HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 170 HP
SW upgrade: E520135
Calibration: E520135

Variant 17

ECU

Catalog engine: 2000 170HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 170 HP
SW upgrade: VJ18905
Calibration: VJ18905

Variant 18

ECU

Catalog engine: 2000 170HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 170 HP
SW upgrade: E332195
Calibration: E332195

Variant 19

ECU

Catalog engine: 2000 170HP
Controller brand: SIEMENS
ECU: MSD81
Stock power: 170 HP
SW upgrade: A529401
Calibration: A529401

Related vehicles

Other vehicles built on the MSD81 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 MSD81?

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 ECU software on this model?

Yes — the BMW 5 SERIES on the MSD81 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.