Catalog/ Cars/ Seat/ Leon

Seat Leon 1.5 TSI

Name: Seat Leon 1.5 TSI chip tuning
Brand: Seat
Price: 110.00 EUR
Availability: InStock

IV (KL) (04/2020–2024) · 150 hp

Stage 1

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	150	175	+25
Torque Nm	250	300	+50

Power gain

+17%

Torque gain

+20%

Ready to feel these +25 hp on the road?

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

Order tuning file →

Stage 1 file from €110

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	150	155	+5
Torque Nm	250	260	+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 €1 022 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 −46%

Petrol · 100 km

~~7.0 L~~ · €14.85

E85 · 100 km

8.8 L · €8.04

You save ≈ €6.81 every 100 km — about €1 022 a year (over 15 000 km)

E85 uses ≈ +26% more litres, but the pump price (€0.909/L vs €2.122/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	150	190	+40
Torque Nm	250	320	+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.

+40 hp and €1 022/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 −46%

Petrol · 100 km

~~7.0 L~~ · €14.85

E85 · 100 km

8.8 L · €8.04

You save ≈ €6.81 every 100 km — about €1 022 a year (over 15 000 km)

E85 uses ≈ +26% more litres, but the pump price (€0.909/L vs €2.122/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 →