Custom dyno ECU tuning for the BMW G-Series 40D. Significant gains in power and torque across the entire rev range, tailored specifically to your vehicle on our 4WD linked rolling road.
Book Your AppointmentThe BMW G-Series 40D represents the next evolution of BMW's renowned 3.0-litre straight-six diesel platform. Refined, immensely powerful and exceptionally smooth, the 40D combines modern ECU strategy with BMW's latest drivetrain technology to deliver effortless real-world performance.
In factory form, BMW typically quote figures of around 340bhp and 700Nm. However, on our 4WD linked dyno we regularly see stock outputs closer to 320 to 330bhp and 670 to 690Nm, leaving considerable headroom within the OEM calibration.
With our Stage 1 custom dyno ECU tuning, we consistently achieve 395 to 405bhp and 780 to 820Nm of torque. Throttle response is sharpened, mid-range torque is significantly increased and overtaking performance is dramatically improved, all without sacrificing drivability or comfort.
Our calibrations are torque-managed, gear-aware and safety led, ensuring power is delivered progressively and sympathetically to the drivetrain. Having tuned hundreds of BMW 40D and 35D platforms, our R&D allows us to extract industry-leading gains while maintaining OEM-level reliability. Every calibration is developed in-house on our dyno and tailored specifically to the vehicle in front of us. No generic files and no compromises.
| Measurement | Stock | DC Stage 1 |
|---|---|---|
| Engine Power | 320-330 HP | 395-405 HP +75hp |
| Engine Torque | 670-690 Nm | 780-820 Nm +120nm |
Tested at DC Performance Centre, Warrington. BMW's claimed factory output is 340bhp. Our stock baseline on this platform consistently measures 320 to 330bhp.
"Had my X5 40D remapped here and the transformation is remarkable. The torque in the mid range is on another level now. It pulls so hard from 1500rpm right through to the limiter. Professional setup, really welcoming team and I got a full dyno printout to take away. Highly recommended."
"Booked in my 740D for the Stage 1 remap and xHP gearbox tune. The combination of both is absolutely brilliant. The gearbox is so much sharper, no more hunting between gears, and the power increase is very noticeable. DC Remapping clearly know their stuff with BMW diesels."
"Took my X3 M40D over from Sheffield. Was a bit nervous about remapping 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 ZF8 automatic gearbox in the BMW 40D G-Series is an exceptionally strong unit and when optimised through xHP gearbox tuning, it completely transforms how the car drives.
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 40D 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.
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.