Unlock More Power, Torque & Efficiency from Your BMW Diesel

At Onyx Performance, we specialise in BMW diesel tuning for models from 2005 onwards, offering Stage 1 & Stage 2 ECU remapping to increase power, torque, and fuel efficiency. Whether you drive a 116d, 118d, 120d, 320d, 330d, 530d, 535d, or 740d, we provide custom ECU tuning and gearbox remapping using our state-of-the-art dyno for precise performance gains and improved drivability.

Our expert technicians fine-tune all BMW diesel engines, ensuring safe, reliable power upgrades tailored to your driving style and performance goals.

📍 Based in Slough, Berkshire – Conveniently located near the M25, M4, and M40, serving customers from London, Berkshire, and beyond.

📞 Call us today on 01753 439321 to book your BMW diesel remap!

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BMW Diesel Tuning – What is ECU Remapping?

The engine control unit (ECU) in your BMW diesel comes with a factory-limited tune, designed to meet global regulations and varying fuel quality standards. ECU remapping reprograms the software to unlock more power, torque, and fuel efficiency, while maintaining safety and reliability.

✔ Increased Power & Torque – Stronger midrange performance & better acceleration
✔ Better Fuel Economy – Improved MPG, particularly for motorway driving
✔ Smoother Power Delivery – Less turbo lag and sharper throttle response
✔ Optimised Gearbox Software – Faster shifts & improved drivability (for automatic & ZF gearboxes)

At Onyx Performance, our custom remaps are tested on our 4WD Dyno, ensuring accurate, proven performance gains.

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Stage 1 & Stage 2 BMW Diesel Tuning – Power Gains

We offer two tuning stages depending on your BMW’s setup and supporting modifications.

🔹 Stage 1 – ECU Remap (Stock Hardware)

• Perfect for daily driving – Increased power and torque with no modifications
• Optimised fuel economy & throttle response
• No additional hardware required
• Safe & reliable tuning for long-term use

🚗 Power Gains (Estimated):

• 116d / 118d / 120d (2.0D B47) – 150HP → 190HP & 420Nm
• 320d / 420d (2.0D B47) – 190HP → 230HP & 470Nm
• 330d / 430d (3.0D N57/B57) – 258HP → 310HP & 650Nm
• 530d / 730d (3.0D N57/B57) – 265HP → 320HP & 700Nm
• 535d / 740d (3.0D Twin-Turbo N57/B57) – 313HP → 380HP & 750Nm

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🔹 Stage 2 – ECU & Gearbox Remap (With Upgraded Hardware)

• For enthusiasts seeking maximum performance
• Requires supporting modifications to improve airflow, cooling, and turbo efficiency
• Includes Stage 2 Gearbox Remap (Highly recommended for automatic/ZF models)
• More aggressive throttle response & sharper power delivery

🔧 Required Hardware Upgrades:

• High-Flow Air Filter – Improves airflow & engine efficiency
• Decat Downpipe or High-Flow Sports Catalyst – Enhances turbo performance & exhaust flow
• Larger Intercooler – Reduces intake temperatures for more consistent power
• EGR & DPF Solutions Available – For off-road & motorsport use

🚗 Power Gains (Estimated):

• 116d / 118d / 120d (2.0D B47) – 190HP → 210HP & 450Nm
• 320d / 420d (2.0D B47) – 230HP → 250HP & 500Nm
• 330d / 430d (3.0D N57/B57) – 310HP → 360HP & 700Nm
• 530d / 730d (3.0D N57/B57) – 320HP → 370HP & 750Nm
• 535d / 740d (3.0D Twin-Turbo N57/B57) – 380HP → 420HP & 800Nm

📞 Call us on 01753 439321 to discuss Stage 2 tuning options for your BMW diesel!

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BMW Diesel Models We Tune

At Onyx Performance, we provide ECU and gearbox remapping for nearly all BMW diesel models from 2005 to present. Some of the most popular vehicles we tune include:

🔹 BMW Diesel Hatchbacks & Saloons

✔ BMW 1 Series – 116d, 118d, 120d (E87, F20, F40)
✔ BMW 2 Series – 218d, 220d, 225d (F22, F44, F87)
✔ BMW 3 Series – 316d, 318d, 320d, 330d, 335d (E90, F30, G20)
✔ BMW 4 Series – 418d, 420d, 430d, 435d (F32, G22)
✔ BMW 5 Series – 520d, 525d, 530d, 535d (E60, F10, G30)

🔹 BMW Diesel SUVs & Performance Models

✔ BMW X1 18d, 20d, 25d
✔ BMW X3 20d, 30d, 35d
✔ BMW X4 20d, 30d, 35d
✔ BMW X5 25d, 30d, 40d, 50d
✔ BMW X6 30d, 40d, 50d
✔ BMW 7 Series 730d, 740d, 750d

📞 Call 01753 439321 to check if your BMW is compatible for remapping!

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Gearbox Remapping for BMW Diesel Automatic & ZF Transmissions

For BMW automatic (ZF8HP) & Sport Automatic (Steptronic) models, we offer Stage 1 & Stage 2 gearbox tuning to improve shift speed, throttle response, and torque handling.

✔ Faster Gear Changes – Improved acceleration response
✔ Increased Torque Limits – Supports higher power outputs safely
✔ Smoother Downshifts – Better control in manual & sport modes
✔ Launch Control Optimisation – More consistent launches

🔧 Recommended for Stage 2 tuning to match higher power output.

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Why Choose Onyx Performance for BMW Diesel Tuning?

✔ Rolling Road Dyno Tested – Every remap is measured for proven power gains
✔ Custom ECU Calibration – Tailored software for each BMW model & driving style
✔ Safe & Reliable Tuning – We prioritise engine longevity & efficiency
✔ Servicing & Maintenance Available – Keep your BMW running at peak performance
✔ Trusted by Thousands of BMW Owners Across the UK

📍 Location: Slough, Berkshire
📞 Call Us: 01753 439321

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Book Your BMW Diesel Remap Today

🚀 Unlock more power, torque, and fuel efficiency with Onyx Performance! 🚀

📞 Call now on 01753 439321 to book your BMW diesel ECU & gearbox remap!

🔹 Located in Slough, Berkshire – Easy access from London, Reading, and Maidenhead
🔹 Specialists in BMW Diesel Performance Tuning & Servicing
🔹 Finance Options Available

Transform your BMW with Onyx Performance – Drive faster, smoother, and more powerful!