SEAT · SIMOS 18.1 ECU · petrol

SEAT LEON SIMOS 18.1 tuning files

The SEAT LEON on the SIMOS 18.1, mapped from stock file to finished result. Stock output across the matched variants spans 180–330 HP. There are 20 distinct variants on file for this combination. 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.

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Available solutions

What we can run on the SIMOS 18.1 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

20 distinct variants for the SEAT LEON on the SIMOS 18.1 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 2000 330HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 330 HP
ECU SW: 0001
ECU HW: 5F6906259L
SW upgrade: 5F6906259L_0001
Calibration: 5F6906259L_0001

Variant 2

ECU

Catalog engine: 2000 330HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 330 HP
ECU SW: 0004
ECU HW: 8S0906259
SW upgrade: 8S0906259_0004
Calibration: 8S0906259_0004

Variant 3

ECU

Catalog engine: 2000 330HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 330 HP
SW upgrade: 5F6906259D_0001
Calibration: 5F6906259D_0001

Variant 4

ECU

Catalog engine: 2000 330HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 330 HP
ECU SW: 0001
ECU HW: 8S0906259B
SW upgrade: 8S0906259B_0001
Calibration: 8S0906259B_0001

Variant 5

ECU

Catalog engine: 2000 330HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 330 HP
ECU SW: 0001
ECU HW: 5F6906259AJ
SW upgrade: 5F6906259AJ_0001
Calibration: 5F6906259AJ_0001

Variant 6

ECU

Catalog engine: 2000 300HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 300 HP
SW upgrade: 5G0906259H_0001
Calibration: 5G0906259H_0001

Variant 7

ECU

Catalog engine: 2000 300HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 300 HP
Calibration: 8S0906259C_0004

Variant 8

ECU

Catalog engine: 2000 300HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 300 HP
Calibration: 8V0906259K_0003

Variant 9

ECU

Catalog engine: 2000 300HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 300 HP
Calibration: 5N0906259_0003

Variant 10

ECU

Catalog engine: 2000 300HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 300 HP
Calibration: 8V0906259P_0001

Variant 11

ECU

Catalog engine: 2000 300HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 300 HP
SW upgrade: 5N0906259_0002
Calibration: 5N0906259_0002

Variant 12

ECU

Catalog engine: 2000 300HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 300 HP
ECU SW: 0003
ECU HW: 8V0906259J
SW upgrade: 8V0906259J_0003
Calibration: 8V0906259J_0003

Variant 13

ECU

Catalog engine: 2000 300HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 300 HP
SW upgrade: 5N0906259B_0001
Calibration: 5N0906259B_0001

Variant 14

ECU

Catalog engine: 2000 280HP
Engine code: CJXA
Generation: 5F Mk1 2012-2017
Matched gains engine: 2.0TSI Cupra 280
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 280 HP
Stage 1 power: 350 HP
Power increase: +70 HP (+25%)
Stock torque: 350 Nm
Stage 1 torque: 460 Nm
Torque increase: +110 Nm (+31%)
ECU SW: 10320433AA
ECU HW: CASC8O30.DAT
SW upgrade: 5G0906259J_0002
Calibration: 5G0906259J_0002

Variant 15

ECU

Catalog engine: 2000 280HP
Engine code: CJXA
Generation: 5F Mk1 2012-2017
Matched gains engine: 2.0TSI Cupra 280
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 280 HP
Stage 1 power: 350 HP
Power increase: +70 HP (+25%)
Stock torque: 350 Nm
Stage 1 torque: 460 Nm
Torque increase: +110 Nm (+31%)
ECU SW: 10320433AA
ECU HW: CASC8O30.DAT
SW upgrade: 8V0906259F_0002
Calibration: 8V0906259F_0002

Variant 16

ECU

Catalog engine: 2000 280HP
Generation: 5F Mk1 2012-2017
Matched gains engine: 2.0TSI Cupra 280
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 280 HP
Stage 1 power: 350 HP
Power increase: +70 HP (+25%)
Stock torque: 350 Nm
Stage 1 torque: 460 Nm
Torque increase: +110 Nm (+31%)
SW upgrade: 5G0906259F_0002
Calibration: 5G0906259F_0002

Variant 17

ECU

Catalog engine: 2000 280HP
Engine code: CJXA
Generation: 5F Mk1 2012-2017
Matched gains engine: 2.0TSI Cupra 280
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 280 HP
Stage 1 power: 350 HP
Power increase: +70 HP (+25%)
Stock torque: 350 Nm
Stage 1 torque: 460 Nm
Torque increase: +110 Nm (+31%)
SW upgrade: 3G0906259B_0001
Calibration: 3G0906259B_0001

Variant 18

ECU

Catalog engine: 2000 280HP
Engine code: CJXA
Generation: 5F Mk1 2012-2017
Matched gains engine: 2.0TSI Cupra 280
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 280 HP
Stage 1 power: 350 HP
Power increase: +70 HP (+25%)
Stock torque: 350 Nm
Stage 1 torque: 460 Nm
Torque increase: +110 Nm (+31%)
Calibration: 3G0906259_0003

Variant 19

ECU

Catalog engine: 1800 180HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 180 HP
ECU SW: 0002
ECU HW: 3G0906259B
SW upgrade: 3G0906259B_0002
Calibration: 3G0906259B_0002

Variant 20

ECU

Catalog engine: 1800 180HP
Controller brand: SIEMENS
ECU: SIMOS 18.1
Stock power: 180 HP
SW upgrade: 5G0906259K_0001
Calibration: 5G0906259K_0001

Related vehicles

Other vehicles built on the SIMOS 18.1 controller or the same engine — handy when a platform spans several models and makes.

Questions, answered.

Which tuning solutions are available for the SEAT LEON on the SIMOS 18.1?

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 18.1 ECU software on this model?

Yes — the SEAT LEON on the SIMOS 18.1 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.