ECU Tune for BMW M340i G20/G21 (2019+)
(B58 3.0L Inline-6 Turbocharged) 
(Bosch MG1CS003 ECU/DME)

M340i B58 Tuning Potential:
 
- - STOCK HP & TQ - -
382 HP / 369 FT-LB
 
- - STAGE 1 - -
420 HP / 450 FT-LB (610 Nm)
Can be performed on stock M340i
 
- - STAGE 2 - - [+$300]
440 HP/ 480 FT-LB (650 Nm)
- Requires M340i Mods:
Catless Downpipes
Spark plugs upgrade
High flow intake
Transmission tune
 
- - ZF8HP TCU Tuning - - [+$599]
BMW Transmission Tuning:
- Increased torque through all RPMs,
- Noticably Smoother Shifts and Acceleration
- Custom shift patterns to match your driving needs
Can be done with any Stage of Tuning!
 
Stock power and gains vary based on conditions and state of the vehicle.
 
The BMW B58 engine is a 3.0-liter inline-six engine that was first introduced in 2015. It is used in a variety of BMW models, including the BMW 740i, BMW 440i, and Toyota Supra A90. The engine is known for its smoothness, power, and efficiency, making it a popular choice for BMW enthusiasts.
 
The ZF 8HP is an 8-speed Hydraulic system Planetary gear automatic transmission. It is still used in a wide range of high end car models, including: Aston Martin, most BMW Serie, Audi, Rolls-Royce, Toyota Supra, and many more. The ZF 8HP was first introduced in 2009 and is a popular choice among car enthusiasts for its smooth and responsive shifting, excellent fuel efficiency, and reliable performance capabilities.
 
The MG1CS003 is an engine control unit (ECU), also known as DME/ECM/DDE. It is responsible for controlling the fuel injection, turbocharging, and other engine management functions. In order to tune the BMW M340i, it is necessary to modify the MG1CS003, either through remapping or through the use of an aftermarket tuning box.
 
There are several reasons why you might consider BMW B58 tuning, including:
 
- Increase Horsepower & Torque: The most noticable benefits of tuning your ECU is the increase in horsepower and torque. Even without aftermarket modifications, you can see a significant improvement in your engine's performance, resulting in faster acceleration and a more engaging driving experience.
 
- Improve Fuel Efficiency: While more HP and TQ is often the primary goal of tuning, many tuning parameters can also result in improved fuel efficiency. By optimizing the engine's performance, you can reduce the amount of fuel needed to accelerate and cruise, saving you money at the pump.
 
- Enhanced Reliability: By addressing common issues from the factory and making the engine more efficient, you can reduce the risk of breakdowns and extend the life of your vehicle.
 
Tuning File Fits:
2019+ BMW M340i G20 G21 (3 Litres, Turbocharged)