Catalog/ Cars/ Fiat/ 500X

Fiat 500X 1.5 T FireFly

Name: Fiat 500X 1.5 T FireFly chip tuning
Brand: Fiat
Price: 105.00 EUR
Availability: InStock

2018–present · 130 hp

Stage 1

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	130	150	+20
Torque Nm	240	280	+40

Power gain

+15%

Torque gain

+17%

Ready to feel these +20 hp on the road?

Get your ready-to-flash Stage 1 file for the Fiat 500X

Order tuning file →

Stage 1 file: €105

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

Power graph / Stage 1

PowerTorqueStock

	Original	After E85	Diff
Power hp	130	135	+5
Torque Nm	240	250	+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 €919 a year at the pump

Get your E85 adaptation file for the Fiat 500X

Order tuning file →

File from €100

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

Fuel cost — E85 vs petrol −48%

Petrol · 100 km

~~6.1 L~~ · €12.88

E85 · 100 km

7.4 L · €6.75

You save ≈ €6.13 every 100 km — about €919 a year (over 15 000 km)

E85 uses ≈ +22% 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 Fiat 500X, calculateur d'économies par département →

	Original	After E85 + Stage 1	Diff
Power hp	130	165	+35
Torque Nm	240	295	+55

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.

+35 hp and €919/year saved — both

Get your E85 + Stage 1 file for the Fiat 500X

Order tuning file →

File from €100

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

Fuel cost — E85 vs petrol −48%

Petrol · 100 km

~~6.1 L~~ · €12.88

E85 · 100 km

7.4 L · €6.75

You save ≈ €6.13 every 100 km — about €919 a year (over 15 000 km)

E85 uses ≈ +22% 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 Fiat 500X, calculateur d'économies par département →

Original ECU files for Fiat 500X Stock (ORI) files of this model · €20 per file →