AUDI · SIMOS 8.5 ECU · petrol

AUDI A8 SIMOS 8.5 tuning files

The AUDI A8 on the SIMOS 8.5, mapped from stock file to finished result. Stock output across the matched variants spans 290–333 HP. Petrol calibration here is about crisp response and a result that holds up day to day. Your file is built against the exact ECU software on the car, then operator-verified.

Upload your file →All A8 coverage Custom ECU tuning file service

Available solutions

Solutions that apply to the SIMOS 8.5 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

8 distinct variants for the AUDI A8 on the SIMOS 8.5 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 3000 333HP
Controller brand: SIEMENS
ECU: SIMOS 8.5
Stock power: 333 HP
SW upgrade: 4G0907551E_0003
Calibration: 4G0907551E_0003

Variant 2

ECU

Catalog engine: 3000 333HP
Controller brand: SIEMENS
ECU: SIMOS 8.5
Stock power: 333 HP
ECU HW: 650S855593
SW upgrade: 4G0907551E_0002
Calibration: 4G0907551E_0002

Variant 3

ECU

Catalog engine: 3000 333HP
Controller brand: SIEMENS
ECU: SIMOS 8.5
Stock power: 333 HP
SW upgrade: 4G0907551G_0002
Calibration: 4G0907551G_0002

Variant 4

ECU

Catalog engine: 3000 333HP
Controller brand: SIEMENS
ECU: SIMOS 8.5
Stock power: 333 HP
SW upgrade: 4G0907551F_0002
Calibration: 4G0907551F_0002

Variant 5

ECU

Catalog engine: 3000 333HP
Controller brand: SIEMENS
ECU: SIMOS 8.5
Stock power: 333 HP
ECU HW: 650S855593
SW upgrade: 4H0907551D_0003
Calibration: 4H0907551D_0003

Variant 6

ECU

Catalog engine: 3000 333HP
Controller brand: SIEMENS
ECU: SIMOS 8.5
Stock power: 333 HP
SW upgrade: 4H0907551J_0002
Calibration: 4H0907551J_0002

Variant 7

ECU

Catalog engine: 3000 333HP
Controller brand: SIEMENS
ECU: SIMOS 8.5
Stock power: 333 HP
SW upgrade: 4G0907551_0004
Calibration: 4G0907551_0004

Variant 8

ECU

Catalog engine: 3000 290HP
Engine code: CTVA
Generation: D4 2010-2015
Matched gains engine: 3.0 TFSI 290
Controller brand: SIEMENS
ECU: SIMOS 8.5
Stock power: 290 HP
Stage 1 power: 400 HP
Power increase: +110 HP (+38%)
Stock torque: 420 Nm
Stage 1 torque: 520 Nm
Torque increase: +100 Nm (+24%)
SW upgrade: 4H0907551J_0006
Calibration: 4H0907551J_0006

Related vehicles

Other vehicles built on the SIMOS 8.5 controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the AUDI A8 on the SIMOS 8.5?

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 SIMOS 8.5 ECU software on this model?

Yes — the AUDI A8 on the SIMOS 8.5 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.