Custom dyno ECU tuning for the BMW 45e hybrid — 545e, 745e and X5 45e. Big combined-output gains, tailored specifically to your vehicle on our 4WD linked rolling road.
Book Your AppointmentThe BMW 45e pairs the brilliant B58 3.0-litre straight-six petrol engine with BMW's eDrive electric motor — silent EV running around town, effortless six-cylinder muscle everywhere else. It's one of the cleverest powertrains BMW makes, and one with serious untapped potential.
In factory form BMW quote a combined output of around 394bhp and 600Nm across the 545e, 745e and X5 45e. As with every BMW platform, the factory calibration is deliberately conservative — leaving substantial headroom on the combustion side of the powertrain.
With our Stage 1 custom dyno ECU tuning, we achieve combined outputs of 500 to 520bhp and 800 to 830Nm. Throttle response sharpens, the mid-range swells and the way the petrol and electric sides hand over becomes even smoother — all without sacrificing the 45e's refinement or its EV running.
Our calibrations are torque-managed, gear-aware and safety led — the hybrid system's own strategies are fully respected, so power is delivered progressively and sympathetically to the drivetrain. Every calibration is developed in-house on our 4WD linked dyno and tailored to the exact vehicle in front of us. No generic files and no compromises.
| Measurement | Stock | DC Stage 1 |
|---|---|---|
| Engine Power | 394 HP (combined) | 500-520 HP +115hp |
| Engine Torque | 600 Nm (combined) | 800-830 Nm +215nm |
Chart shows a real customer BMW 745e measured on our 4WD linked dyno — 394.5hp / 577Nm stock to 514.5hp / 811Nm with our Stage 1 calibration. Exact results vary by model and battery state of charge; you receive your own before and after printout.
"Had my X5 45e remapped here and the transformation is remarkable. The way the petrol and electric pull together now is something else — it surges from any speed and still drives beautifully in EV mode around town. Professional setup, really welcoming team and I got a full dyno printout to take away. Highly recommended."
"Booked my 745e in for the Stage 1 and watched it make over 510hp on their dyno — from 394 stock. The shove in the mid range is huge but it's lost none of its refinement, still silent in EV around town. DC Remapping clearly know their stuff with these hybrids."
"Took my 545e over from Sheffield. Was a bit nervous about remapping a hybrid but the lads walked me through everything and did a full health check before they started. The numbers on the dyno sheet blew me away. Car drives completely differently now. Already told three mates to book in."
The 45e uses a ZF8 automatic with BMW’s electric motor integrated into the housing — an exceptionally strong unit. Optimising the gearbox alongside the engine calibration transforms how the car delivers its combined output.
From the factory the gearbox is programmed to prioritise comfort and fuel economy. xHP software unlocks its full potential, with sharper and faster shifts that better match the increased torque output from your Stage 1 tune. The ZF8 is capable of handling up to 950Nm of torque, making it the perfect pairing for our engine calibration.
The result is a car that feels substantially more alive. Power gets to the wheels quicker, the gearbox holds gears when you want it to and the overall driving experience is transformed across all conditions.
Watch a BMW G-Series run on our V-tech 4WD Linked Dyno. Our dyno is fully xDrive safe, using mechanically linked axles to protect your transfer box and give accurate, repeatable results every time — essential for a hybrid xDrive like the 45e.
We use the V-tech 4WD Linked Dyno, one of the most advanced rolling road systems available. Crucially it is xDrive safe, meaning BMW's all-wheel drive system is fully protected throughout the entire testing process.
Unlike non-linked dynos which can damage the transfer box or give false torque readings, our linked axle technology ensures both front and rear rollers turn in perfect synchronisation. Accurate, real-world performance data every time.
Book your Stage 1 appointment at DC Performance Centre, Warrington. Spaces are limited so contact us today.
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