SEAT · MED17.5.5 ECU · petrol

SEAT LEON MED17.5.5 tuning files

The SEAT LEON on the MED17.5.5, mapped from stock file to finished result. Across the matched variants stock power runs from 125 to 125 HP. 6 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 LEON coverage

Available solutions

Applicable work for the MED17.5.5 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

6 distinct variants for the SEAT LEON on the MED17.5.5 ECU. Reference the engine and controller software when you upload.

Variant 1

ECU

Catalog engine: 1400 16v FSI 125HP
Engine code: CAXA
Controller brand: BOSCH
ECU: MED17.5.5
Stock power: 125 HP
ECU SW: 5884
ECU HW: 03C906016AF
SW upgrade: 03C906016AF_5884
Calibration: 03C906016AF_5884

Variant 2

ECU

Catalog engine: 1400 16v FSI 125HP
Engine code: CAXC
Controller brand: BOSCH
ECU: MED17.5.5
Stock power: 125 HP
SW upgrade: 03C906016AP_9086
Calibration: 03C906016AP_9086

Variant 3

ECU

Catalog engine: 1400 16v FSI 125HP
Engine code: CAXC
Controller brand: BOSCH
ECU: MED17.5.5
Stock power: 125 HP
ECU SW: 6004
ECU HW: 03C906016AP
SW upgrade: 03C906016AP_6004
Calibration: 03C906016AP_6004

Variant 4

ECU

Catalog engine: 1400 125HP
Engine code: CAXA
Controller brand: BOSCH
ECU: MED17.5.5
Stock power: 125 HP
ECU SW: 3421
ECU HW: 03C906016GC
SW upgrade: 03C906016GC_3421
Calibration: 03C906016GC_3421

Variant 5

ECU

Catalog engine: 1400 125HP
Engine code: CAXA
Controller brand: BOSCH
ECU: MED17.5.5
Stock power: 125 HP
ECU SW: 3416
ECU HW: 03C906016FN
SW upgrade: 03C906016FN_3416
Calibration: 03C906016FN_3416

Variant 6

ECU

Catalog engine: 1400 125HP
Engine code: CAXC
Controller brand: BOSCH
ECU: MED17.5.5
Stock power: 125 HP
ECU SW: 3415
ECU HW: 03C906016FL
SW upgrade: 03C906016FL_3415
Calibration: 03C906016FL_3415

Related vehicles

Other vehicles built on the MED17.5.5 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 MED17.5.5?

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 MED17.5.5 ECU software on this model?

Yes — the SEAT LEON on the MED17.5.5 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.