Catalog/ Cars/ BMW/ Serie 4

BMW Serie 4 440i

F32/33 LCI (05/2016–2020) · 326 hp

Stage 1

Stage 2

E85

E85 + Stage 1

	Original	After tuning	Diff
Power hp	326	400	+74
Torque Nm	450	580	+130

Power gain

+23%

Torque gain

+29%

Ready to feel these +74 hp on the road?

Get your ready-to-flash Stage 1 file for the BMW Serie 4

Order tuning file →

Stage 1 file: €120

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

Power graph / Stage 1

PowerTorqueStock

	Original	After tuning	Diff
Power hp	326	420	+94
Torque Nm	450	620	+170

Power gain

+29%

Torque gain

+38%

Ready to feel these +94 hp on the road?

Get your ready-to-flash Stage 2 file for the BMW Serie 4

Order tuning file →

Stage 2 file: €180

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

Power graph / Stage 2

PowerTorqueStock

	Original	After E85	Diff
Power hp	326	340	+14
Torque Nm	450	470	+20

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 €2 278 a year at the pump

Get your E85 adaptation file for the BMW Serie 4

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

~~15.2 L~~ · €32.19

E85 · 100 km

18.7 L · €17.0

You save ≈ €15.19 every 100 km — about €2 278 a year (over 15 000 km)

E85 uses ≈ +23% more litres, but the pump price (€0.909/L vs €2.116/L, France average on October 30, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la BMW Serie 4, calculateur d'économies par département →

	Original	After E85 + Stage 1	Diff
Power hp	326	440	+114
Torque Nm	450	615	+165

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.

+114 hp and €2 278/year saved — both

Get your E85 + Stage 1 file for the BMW Serie 4

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

~~15.2 L~~ · €32.19

E85 · 100 km

18.7 L · €17.0

You save ≈ €15.19 every 100 km — about €2 278 a year (over 15 000 km)

E85 uses ≈ +23% more litres, but the pump price (€0.909/L vs €2.116/L, France average on October 30, 2026) more than makes up for it.

🇫🇷 Version française : conversion éthanol E85 de la BMW Serie 4, calculateur d'économies par département →

Original ECU files for BMW 28 112 stock (ORI) files · €20 per file →