Performance Chip Tuning VW Jetta IV (until 2005)
10 engines · +9 to +24 hp
Volkswagen Jetta IV: 10 engines — 10 gas. Gains run from +9 to +24 hp, with up to +32 Nm more torque. GAN GA+ from 189 EUR.
All Volkswagen Jetta IV engines: exact gains
STOCK output, output with GAN, gain and price for each module.
| Engine | STOCK → with GAN | Gain | Tuners and prices | |
|---|---|---|---|---|
| Gasoline · 10 engines | ||||
| 2.8i204 hp / 270 Nm | +24 hp+32 Nm |
GA — 199 EUR · 228 hp GA+ — 199 EUR · 228 hp |
Select → | |
| 1.8 TSI180 hp / 233 Nm | +22 hp+28 Nm |
GA — 189 EUR · 202 hp GA+ — 189 EUR · 202 hp |
Select → | |
| 2.3i170 hp / 220 Nm | +20 hp+26 Nm |
GA — 189 EUR · 190 hp GA+ — 189 EUR · 190 hp |
Select → | |
| 1.8i150 hp / 210 Nm | +18 hp+25 Nm |
GA — 189 EUR · 168 hp GA+ — 189 EUR · 168 hp |
Select → | |
| 1.8i125 hp / 170 Nm | +15 hp+20 Nm |
GA — 189 EUR · 140 hp GA+ — 189 EUR · 140 hp |
Select → | |
| 2.0i115 hp / 170 Nm | +14 hp+20 Nm |
GA — 189 EUR · 129 hp GA+ — 189 EUR · 129 hp |
Select → | |
| 1.6i105 hp / 148 Nm | +13 hp+18 Nm |
GA — 189 EUR · 118 hp GA+ — 189 EUR · 118 hp |
Select → | |
| 1.6i101 hp / 145 Nm | +12 hp+17 Nm |
GA — 189 EUR · 113 hp GA+ — 189 EUR · 113 hp |
Select → | |
| 1.6i102 hp / 145 Nm | +12 hp+17 Nm |
GA — 189 EUR · 114 hp GA+ — 189 EUR · 114 hp |
Select → | |
| 1.4i75 hp / 126 Nm | +9 hp+15 Nm |
GA — 189 EUR · 84 hp GA+ — 189 EUR · 84 hp |
Select → | |
Each engine gets its own performance chip: GAN GT / GTL or GAN GA / GA+. Prices are per performance chip and include the current discount.
Not sure which engine you have?
The badge alone isn’t enough: in this generation, the same engine came with different horsepower ratings, each with its own calibration. Check the horsepower in your owner’s manual or vehicle documents and find the matching row.
Same badge, different factory power outputs in this generation:
Volkswagen Jetta IV tune: what changes
More power and torque with no ECU flash and no new parts – the module only adjusts the engine sensor signals. Your factory warranty is preserved: the ECU software is never changed, and the module can be removed at any time.
- Bluetoothswitch modes from your phone
- 18 mapsto fine-tune your engine

- 15 minutesplug-and-play install
- IP67water and dust protection
- +24 hpbest in this generation
2.8i 204 hp → 228 hp. The other engines gain +9 hp and up; 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
Switch between SPORT, DYNAMIC, ECO and STOCK in the GAN app.
- 50 daystest drive
Enhanced performance or your money back, excluding shipping costs.
Volkswagen Jetta IV tuning FAQ
Which tuner do I need for my Volkswagen Jetta IV?
Find your engine in the table above – each row shows the tuner and the price.
Is a tuning module the same as a Stage 1 tune?
Not quite. Stage 1 usually means an ECU flash tune 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.