BMW Model Tuning · M Performance
BMW M340i G20
The M340i is BMW's M Performance flagship 3 Series, powered by the B58 3.0-litre turbo straight-six producing 374 hp and 500 Nm from the factory. Available in RWD and xDrive configurations with the ZF8 transmission.
Tuning Highlights
One of the most popular tuning platforms in the current BMW range. Stage 1 transforms the M340i into a genuine sports car with 420+ hp and near-M3 performance. The ZF8 TCU remap unlocks sharper shifts and higher torque limits.
Engine: BMW B58 3.0L Turbo I6
The B58 is BMW's modular straight-six turbo petrol engine, introduced in 2015 as the successor to the N55. It powers the M340i, M240i, X3 M40i and Toyota Supra among others. Known for exceptional build quality, a closed-deck block, and strong tuning ...
Stage 1
Stage 1 calibration typically yields 380-420 hp and 540-580 Nm on 98+ RON fuel with no hardware changes. The factory intercooler and fuelling system h...
Reliability
The B58 is exceptionally robust. Weak points at higher power levels include the factory charge pipe (prone to popping under boost) and the stock inter...
Related BMW Resources
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Submit your BMW ECU file through the JB Remap File Service Portal.