Chiptuning BMW 8 Series G15 (since 2018)
2 engines · +54 to +58 hp
BMW 8 Series G15: 2 engines — 1 petrol and 1 diesel. The gain is +54 to +58 hp, with up to +116 Nm more torque. GAN GTL from 279 EUR, GAN GT from 459 EUR.
All BMW 8 Series G15 engines: exact gains
Standard output, output with GAN, the gain and the price for each box. Diesel and petrol engines are listed separately.
| Engine | STOCK → with GAN | Gain | Tuning boxes and prices | |
|---|---|---|---|---|
| Diesel · 1 engine | ||||
| 840d320 hp / 680 Nm | +54 hp+116 Nm |
GTL — 279 EUR · 365 hp GT — 459 EUR · 374 hp |
Select → | |
| Petrol · 1 engine | ||||
| 840i340 hp / 500 Nm | +58 hp+85 Nm |
GTL — 279 EUR · 388 hp GT — 459 EUR · 398 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?
Find your engine by the power output in your registration document: each version has its own module calibration.
BMW 8 Series G15 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
- +58 hpbest in this generation
840i 340 hp → 398 hp. The other engines gain at least +54 hp; check the table for each one.
- +116 Nmfor diesels
Diesels gain mostly torque: +116 to +116 Nm, which helps with overtaking and towing.
- 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.
BMW 8 Series G15 remap: common questions
Which tuning box do I need for the BMW 8 Series G15?
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.