BMW 330e G20: ECU Unlock, Stage 1 Custom + TCU, 414bhp & 725Nm

This BMW 330e (G20) plug-in hybrid came in for an ECU unlock, our Stage 1 custom dyno tune and a TCU gearbox calibration for its 8-speed automatic, all on the same visit. It pairs BMW’s B48 2.0 turbo petrol with an electric motor.

ECU unlocked in-house first

Like most newer BMWs, its ECU left the factory locked, so we unlocked it in-house before carrying on with baseline runs and live data.

The numbers

On the baseline run it made 292.2bhp and 435Nm. With our calibration and the TCU gearbox calibration it made 414.8bhp and 725Nm, with 367.6bhp at the wheels. That is 122.6bhp and 290Nm more:

Watch the full dyno run

This is the final pull on our dyno, filmed from behind the car, from the start of the run right through to the end. Tap Sound on to hear it.

More torque than an M3 Competition

BMW’s own M3 Competition makes 650Nm. Tuned, this 330e holds over 700Nm from around 2,300 to 3,400rpm, over 650Nm from around 2,100 to 3,850rpm and over 600Nm all the way to around 4,850rpm, with 250Nm or more extra torque from around 2,200 to 3,550rpm and 100bhp or more extra power from around 2,450rpm right to the top of the stock run. It stays above 400bhp from around 4,650 to 5,550rpm.

The gearbox, tuned with the engine

The 8-speed automatic’s TCU was calibrated on the same visit and set up to match the extra torque, so the engine and gearbox are calibrated as one package instead of two separate jobs.

Hybrid owners

Please arrive with the battery charged above 50%. A lower charge can reduce the vehicle’s performance and affect the dyno results.

How it was done

Diagnostics and a health check first, then the ECU unlock, then baseline runs on our 4WD linked dyno with live data logging. The engine calibration was built from there with repeated runs, the gearbox calibration was set up to match, and the final pulls verified the result. No generic files: a calibration written for this car, proven on our dyno.

Got a 3 Series? See our BMW 3 Series tuning figures and BMW B48 tuning page, check your car’s gains and price, or see the 406bhp 330e G20 and the 330e Touring we have tuned.