Catalog/ Cars/ Seat/ Leon

Seat Leon 1.4 TSi

Name: Seat Leon 1.4 TSi chip tuning
Brand: Seat
Price: 75.00 EUR
Availability: InStock

II (1P) (2005–2012) · 125 hp

Stage 1

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	125	145	+20
Torque Nm	200	250	+50

Power gain

+16%

Torque gain

+25%

Ready to feel these +20 hp on the road?

Get your ready-to-flash Stage 1 file for the Seat Leon

Order tuning file →

Stage 1 file from €75

Exact price depends on the ECU — confirmed when you upload the file

✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included

Power graph / Stage 1

PowerTorqueStock

	Original	After E85	Diff
Power hp	125	130	+5
Torque Nm	200	210	+10

E85 adaptation (no Stage 1)

Just the fuel switch: the ECU is adapted to run Superéthanol E85 (up to 85% bio-ethanol) with no Stage 1 chip on top. You get a small power bump from ethanol's higher octane (~104 RON) and a much cheaper fill-up. Flex Fuel file: the car still runs on regular petrol whenever you want.

Save €879 a year at the pump

Get your E85 adaptation file for the Seat Leon

Order tuning file →

File from €100

✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included

Fuel cost — E85 vs petrol −47%

Petrol · 100 km

~~5.8 L~~ · €12.38

E85 · 100 km

7.2 L · €6.52

You save ≈ €5.86 every 100 km — about €879 a year (over 15 000 km)

E85 uses ≈ +23% more litres, but the pump price (€0.909/L vs €2.123/L, France average on October 29, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la Seat Leon, calculateur d'économies par département →

	Original	After E85 + Stage 1	Diff
Power hp	125	155	+30
Torque Nm	200	270	+70

E85 + Stage 1 remap

Chip tuning re-optimised for Superéthanol E85: the ignition and boost maps are calibrated to make full use of ethanol's higher octane (~104 RON). Bigger power and torque gains than either Stage 1 on petrol or E85 adaptation alone, plus the same cheap fill-up.

+30 hp and €879/year saved — both

Get your E85 + Stage 1 file for the Seat Leon

Order tuning file →

File from €100

✓ Original file back-up ✓ Delivered in ~30 min ✓ Support included

Fuel cost — E85 vs petrol −47%

Petrol · 100 km

~~5.8 L~~ · €12.38

E85 · 100 km

7.2 L · €6.52

You save ≈ €5.86 every 100 km — about €879 a year (over 15 000 km)

E85 uses ≈ +23% more litres, but the pump price (€0.909/L vs €2.123/L, France average on October 29, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la Seat Leon, calculateur d'économies par département →

Original ECU files for Seat Leon Stock (ORI) files of this model · €20 per file →