Chiptuning Fiat 124
4 engines · +34 to +41 hp
124: 4 engines — 4 petrol. The gain is +34 to +41 hp, with up to +69 Nm more torque. GAN GTL from 219 EUR, GAN GT from 329 EUR.
All 124 engines: exact gains
Standard output, output with GAN, the gain and the price for each box.
| Engine | STOCK → with GAN | Gain | Tuning boxes and prices | |
|---|---|---|---|---|
| Petrol · 4 engines | ||||
| Spider 1.4T140 hp / 240 Nm | +41 hp+69 Nm |
GTL — 219 EUR · 175 hp GT — 329 EUR · 181 hp |
Select → | |
| Spider 1.4T170 hp / 250 Nm | +36 hp+53 Nm |
GTL — 249 EUR · 201 hp GT — 399 EUR · 206 hp |
Select → | |
| Spider 1.4T166 hp / 249 Nm | +35 hp+52 Nm |
GTL — 249 EUR · 196 hp GT — 399 EUR · 201 hp |
Select → | |
| Spider 1.4T162 hp / 249 Nm | +34 hp+52 Nm |
GTL — 249 EUR · 191 hp GT — 399 EUR · 196 hp |
Select → | |
Each engine has its own tuning box: GAN GT / GTL or GAN GA / GA+. Prices are per box and include the current discount.
Not sure which engine you have?
The badge alone is not enough: in this generation, the same engine designation came in different power outputs, each with its own calibration. Check the power output in your registration document and find the matching row.
Same badge, different factory power outputs in this generation:
Fiat 124 remap: what changes
The GAN box plugs in between the sensors and the engine control unit (ECU) and adjusts their signals, while a flash remap rewrites the ECU itself. Your manufacturer’s warranty is preserved: the ECU software is never changed, and the box can be removed at any time.
- Bluetoothchange modes from your phone
- 18 mapsfine-tuning for your engine

- 15 minutesfitted to the factory connectors
- IP67water and dust protection
- +41 hpbest in this generation
Spider 1.4T 140 hp → 181 hp. The other engines gain at least +34 hp; check the table for each one.
- up to +30%more power
GAN GT: up to 30%, GAN GTL: up to 25%, GAN GA+: up to 12%.
- GAN APPpower control via smartphone
SPORT, DYNAMIC, ECO and STOCK modes in the GAN app.
- 50 daystest drive
Feel the difference or get your money back, excluding delivery costs.
Fiat 124 remap: common questions
Which tuning box do I need for the 124?
Every engine in this generation is turbocharged, so it takes the GAN GT or GAN GTL. Find your engine in the table above – each row shows the box and its price.
Is a tuning module the same as a Stage 1 remap?
Not quite. Stage 1 usually means an ECU remap without replacing any parts. The tuning module also works without replacing parts, but it does not change the ECU software: it adjusts the sensor signals, comes off in about a minute, and the OFF button in the app restores the factory settings.