300 HP Complete Package
€750- ECU Unlock + 300 HP engine tune
- MOSTUNED Flasher included at no extra cost
- Feature coding package
- Stage 2 or Stage 3 gearbox + Gear Display
- Burble · OPF/DP calibration · Sport Cooling
- Cold Start · Vmax · RPM Limiter
MOSTUNED / G20 320i
BMW G20 / 320i engine tuning · 300 HP
A complete 300 HP package for the B48B16-powered G20 / 320i. €750 includes ECU Unlock, engine tuning, coding and Stage 2/3 gearbox tuning with Gear Display. Installed in one visit in Ataşehir, Istanbul.
300 HPPerformance package
30 minApprox. installation time
750 €300 HP package
For compatible 1.6 B48B16 / MG1CS003 vehicles. The tune and timing are confirmed after checking your car and hardware.
MOSTUNED / PACKAGESMOSTUNED / BMW MOSTUNED / BMW
Packages and booking for G20 / 320i
300 HP, feature coding and gearbox tuning in one package. Choose 321 Edition for 321 HP / 500 Nm.
321 Edition Complete Package
€1,250- 321 HP · 500 Nm
- MOSTUNED Flasher included at no extra cost
- All services in the 300 HP complete package
- Feature coding + Stage 2/3 + Gear Display
- Requires a downpipe and E30 fuel
- Map Switch options are added separately
Features depend on vehicle equipment and software compatibility. 321 Edition requires a downpipe and E30 fuel.
G20 320i: is the 300 HP package right for your car?
| Check | Package coverage |
|---|---|
| Chassis and engine | G20 / G20 LCI / G20 LCI II · 1.6 B48B16 / MG1CS003 |
| Power and torque level | 300 HP / 400 Nm |
| Fuel and hardware | 95 RON petrol is sufficient. The 300 HP package is for stock hardware; a downpipe or E30 is not required. |
| ECU Unlock | Included in the €750 complete package. |
The year or 320i badge alone is not enough. We check the engine, ECU and installed software; do not assume this coverage applies to an F30 or E90 320i.
MOSTUNED / ATAŞEHİR
G20s tuned at our workshop
Explore our 280 and 300 HP installations, completed work and Dragy records from separate builds.
G20 LCI · 300 HP and Gear Display
300 HP engine tuning, Stage 2 TCU, Gear Display, Launch Control, feature coding and 261+ km/h instrument display. This car also received an AEM filter.
Vehicle & work details
- Vehicle
- BMW G20 LCI
- Completed work
- 300 HP, Stage 2 TCU, Gear Display, Launch Control, AEM
- Workshop
- MOSTUNED · Ataşehir / İstanbul
G20 320i · 280 HP and Stage 1 TCU
This B48B16-powered 320i received 280 HP engine tuning together with Stage 1 gearbox tuning.
Vehicle & work details
- Vehicle
- BMW G20 320i · B48B16
- Engine
- B48B16
- Completed work
- 280 HP, B48B16, Stage 1 TCU
- Workshop
- MOSTUNED · Ataşehir / İstanbul
- Calibration package
- 280 HP
Two G20 projects · Dragy results
Stock turbo: 11.53 s. R2P 500 turbo: 9.23 s. The 100–200 km/h records of two separate G20s tuned for their respective hardware.
Vehicle & work details · Dragy reports
- Vehicles
- BMW G20 320i · B48B16
- Hardware
- Stock turbo / R2P 500 turbo · two separate cars
13 °C · 132 m · −0.94% · DA 44 m
18 °C · 811 m · −0.70% · DA 1135 m
The Dragy reports show 100–200 km/h times for two separate cars under different conditions.
02 / PACKAGE FEATURES
More than a power increase.
We configure the features supported by your car and package.
Sport Mode Burble
Adjust intensity and RPM range in the app. Active in Sport mode only.
Sport Cooling
Switch the cooling setting on or off in the app.
Cold Start
Cold-start suppression for your preferred startup behaviour.
RPM Limiter
An optional RPM limit, for example 2,500 rpm.
OPF / DP calibration
A calibration option matched to your exhaust hardware.
Stage 2 / Stage 3 TCU
Gearbox tuning with Gear Display and feature coding in the complete package.
MOSTUNED / BMW SOFTWARE
Why MOSTUNED?
Focused on BMW tuning.
From calibration to everyday use.
Our calibration. Our app.
Our own MOSTUNED Flasher is included at no extra cost with every engine tuning package. Access your VIN-authorised package from our iPhone app.
Explore the appOne visit. A complete package.
The 300 HP package combines ECU Unlock, engine tuning, feature coding and Stage 2/3 gearbox tuning with Gear Display.
See the packageYour settings, within reach.
On a compatible car, adjust burble intensity and RPM range in the app, and switch Sport Cooling on or off.
How does it work?See the work before you choose.
Real BMWs, completed installations and available Dragy records. Explore examples from our Ataşehir workshop.
Explore our projectsMOSTUNED / iOSMOSTUNED Flasher
MOSTUNED Flasher
included with your tune.
MOSTUNED Flasher is included at no extra cost with all our engine tuning packages. Access your VIN-authorised Flash package and vehicle data with our own iPhone app.
- FlashChoose your package and driving settings.
- LoggerMonitor live data and record driving logs.
- Unlock CheckCheck ECU lock status for free.
App demo screens.
How do you use MOSTUNED Flasher?
Four steps from connection to writing.
- 1 Install MOSTUNED on your iPhone. Connect using a compatible ENET or WiFi-ENET adapter and open the Connect tab.
- 2 Check the VIN and ECU details. In Flash > Ready Package, choose a calibration authorised for your VIN and the supported settings.
- 3 Keep the ignition on and engine off, with suitable battery charging support. Complete the app’s power and connection checks, then start writing.
- 4 Keep the app open and the connection active; do not switch off the ignition. Wait for the success message and follow the final on-screen instructions.
Selecting a setting in Flash does not change the car immediately; the write operation must finish to apply it. See the guide for preparation and detailed instructions.
G20 320i / MOSTUNED
Go deeper into the details.
Calibration levels, engine information and other services in one place.
Power and hardware options
Power by stage
Factory output 170 PS. Figures in metric horsepower (PS).
280 and 300 on stock hardware; 321 Edition needs a downpipe and E30 fuel. The stage is chosen from datalog data. Package-level comparison; not measured dyno results.
G20 320i tuning: power and hardware options
Calibration levels and hardware requirements. Vehicle-specific records are in Our Work.
| Power | Torque | Hardware |
|---|---|---|
| Stock · 170 HP | 250 Nm | factory |
| 280 HP | 380 Nm | stock hardware |
| 300 HP | 400 Nm | stock hardware |
| 321 HP | 500 Nm | downpipe + E30 fuel |
Power and torque figures describe package levels; this table is not a dyno measurement report.
Engine, compatibility and calibration details
Why is the 320i 1.6 litres in Turkey?
The reason is tax, not engineering. Turkish special consumption tax brackets are set by engine displacement, and the rate jumps sharply above 1,600 cc. Like many manufacturers, BMW offers a variant that stays under the threshold: the B48B16.
It is a member of the B48 family: same architecture as its 2.0-litre sibling, smaller swept volume and therefore different factory torque maps. Factory output is 125 kW — 170 metric horsepower (PS).
In practice this means most "320i tune" files you find online were built for 2.0-litre cars. Same badge, different engine. Loading them on a Turkish 320i does not give a correct calibration.
What the calibration looks at on a Turkish 320i
On a small-displacement turbo engine the priorities differ from a large one.
Torque model
Pedal demand is first converted to a torque request. Unless the torque model is updated, raising boost alone achieves nothing; the ECU pulls it back.
Intake air temperature
A small engine makes the same power at a higher boost ratio. If the temperature-based pull-back thresholds are not handled, the car falls off noticeably in summer.
Fuel quality
On direct injection an octane difference goes straight into timing. A calibration built without knowing your fuel is either unsafe or leaves power on the table.
Fuel system margin
Injector duty and rail pressure are the real limit on how far the target can go. One of the first things we look at in a log.
MG1CS003
The ECU in this car. Read, write, coding and unlock detection were verified end to end on this unit.
Unlock status
Cars built after June 2020 ship locked. The app checks for free — unlock page.
Why we choose the stage with you
Wanting the biggest number is natural, but the right stage depends on the car's own condition. On a car with worn plugs, carbon build-up or low-octane fuel, the top stage produces constant knock correction instead of power — the ECU backs off and you are left with a car worse than the stage below.
That is why a healthy car matters. If you like, we take a road log and confirm knock, boost and air-fuel together — but the files are tested, and a log is not mandatory.
Moving between stages is possible. Because the software is updated through the app, stepping up when your car is ready does not mean going anywhere.
Other licence and BMW service prices
Other licence and BMW service prices
| Service | Note | Price |
|---|---|---|
| 321 Edition Complete Package | 321 HP / 500 Nm · complete 300 HP coverage + 321 Edition | 1.250 € |
| Flasher (write your own file) | No ready-made calibration | 350 € |
| Stage 2 gearbox (on its own) | Launch Control, Shifting Lights | €250 |
| Stage 3 gearbox (on its own) | Faster shifts, torque limit | €250 |
| Feature coding | By iDrive generation | €150 |
| M Track View | Module installation, workshop | TRY 17,500 |
320i questions
Does the G20 320i 300 HP tune need 98 RON or E30?
No. 95 RON petrol is sufficient for the 300 HP / 400 Nm package; 98 RON or E30 is not required. The 321 Edition is a separate package requiring a downpipe and E30.
Is MOSTUNED Flasher included with the tune?
Yes. MOSTUNED Flasher is included with all our engine tuning packages at no extra cost. The Flash package in the app is authorised for your vehicle’s VIN.
Where is the work carried out?
At MOSTUNED, İnönü Mahallesi, Düzenli Sokak No:3/A, Ataşehir, Istanbul. Monday–Saturday 09:00–18:00; arrange an appointment before visiting.
Does the €750 price include gearbox tuning?
The 300 HP package described here includes unlock, engine tuning and Stage 2/3 gearbox tuning with Gear Display for compatible vehicles. Online Flash licence coverage is specified on the respective product pages.
Is the included Stage 2/3 gearbox software with Gear Display a Stage 2 engine tune?
No. Engine tuning concerns the ECU; gearbox tuning concerns the TCU. The €750 300 HP package combines the 300 HP engine level for stock hardware with Stage 2/3 gearbox software with Gear Display. The 321 HP engine level is a separate option requiring a suitable downpipe and E30 fuel. We confirm the engine target and gearbox work separately when planning your visit.
How much does G20 320i tuning cost?
The €750 complete 300 HP package includes ECU Unlock, feature coding, Stage 2/3 gearbox tuning and Gear Display. Burble, OPF/DP calibration, Sport Cooling, Cold Start and limiter settings are included for supported calibrations. 321 Edition (321 HP / 500 Nm) costs €1,250 complete, or €500 to upgrade an existing 300 HP package. Map Switch adds €500 or ID7/ID8 MGU Map Switch adds €1,000; these are separate alternatives.
How much power does a tuned G20 make?
The Turkish-market 1.6-litre 320i makes 170 PS and 250 Nm from the factory. MOSTUNED calibrations offer 280 HP / 380 Nm and 300 HP / 400 Nm on stock hardware, and 321 HP / 500 Nm with a suitable downpipe and E30 fuel.
Is tuning a G20 harmful?
The 300 HP package is for compatible B48B16 vehicles on stock hardware. Engine condition, service history, fuel and existing software are assessed together. 95 RON is sufficient for 300 HP / 400 Nm. Share existing faults and hardware changes before the work so we can confirm the calibration.
What is the difference between Stage 1 and Stage 2 on the G20 320i?
Stage 1 is software with no parts changed; with us that is the 280 / 300 HP level. Stage 2 needs a downpipe and E30 fuel; with us that is the 321 HP level. We have no ready-made package for Stage 3, which requires a turbo upgrade.
What is the 100–200 km/h time of a tuned G20?
100–200 times vary with the car, hardware, fuel and measurement conditions; we do not assign one time to every car on this package. Our Work includes original Dragy records and conditions for two separate G20s. These are not a before/after test of the same car. View the vehicle record.
Where can I see G20 tuning reviews?
See the cars we have worked on at our work and customer reviews on our Google business profile, plus driving and timing videos on our YouTube channel.
Do you also do G20 transmission software?
Yes. Stage 2 and Stage 3 gearbox tuning with Gear Display each cost €250 as a standalone service. Gearbox tuning and feature coding are included in the €750 300 HP package. The stage is selected for your car and driving needs. Details: gearbox tuning.
How do I know whether my car is 1.6 or 2.0?
Engine displacement is on the registration document. A G20 320i bought new in Turkey is almost certainly 1,597 cc. The app also reads the ECU and software version on connection, and we confirm from there.
What if I load a file built for the 2.0?
The torque model and fill calculations are built for a different swept volume, so the car does not behave as expected; at best it corrects constantly. Not something to do.
Do you also do the 330i or 318i?
Our verified coverage is the Turkish-market 1.6 B48B16: 320i (G20), 420i (G22/G26), 520i (G30) and X3 sDrive20i (G01). For other variants we check compatibility first and say plainly if it is not supported.
Do I have to leave my car anywhere?
We offer installation at our Ataşehir workshop. You can also flash your own car through the app with a compatible vehicle, any required unlock, a VIN-authorised licence and connection hardware.
Related BMW services and guides
G20 320i project examplesVehicle photos and work descriptions, with links to the original posts. →Workshop location and opening hoursMonday–Saturday 09:00–18:00; arrange your visit in advance. →BMW B48 tuningthe whole engine family →BMW 420i tuningsame engine, 4 Series →BMW 520i tuningsame engine, 5 Series →Unlock serviceis my car locked →Remote BMW tuninghow the process works →Datalog analysishealth check before a remap →BMW X3 sDrive20i tuningsame engine, X3 G01 →
Compare feature coding packages
- BMW G20 / 320i Feature Coding — Production period, iDrive, features and prices
More options for your BMW
- G20 320i feature coding — Generation, iDrive and package features
- BMW G20 320i LCI 261+ km/h Cluster Display · ID8 — LCI features and price; choose your generation for other versions.
- BMW G20 320i LCI M Track · M3/M4 Cluster — LCI features and price; choose your generation for other versions.
- BMW G20 320i LCI Stage 2 Gearbox Tuning — LCI features and price; choose your generation for other versions.
Other BMW engine tuning options
- G22 / G26 · 420i · 300 HP engine tuning — B48B16 · Complete 300 HP package · €750
- G30 / 520i · 300 HP engine tuning — B48B16 · Complete 300 HP package · €750
- G01 X3 sDrive20i · 300 HP engine tuning — B48B16 · Complete 300 HP package · €750
- B48B16 · 300 HP engine tuning — Engine, ECU and compatibility details
MOSTUNED / ATAŞEHİR
İnönü Mah. Düzenli Sokak No:3/AYour G20 could be next.
Let’s arrange your visit and install your Flash package.
Contact us on WhatsApp ↗Ataşehir / İstanbul
Monday–Saturday 09:00–18:00
0547 470 40 40
Map and directions →