BMW 640D F Series 3.0 Diesel (2014–2018) 308 BHP Twin Turbochargers – The Ultimate Hybrid Upgrade Guide
The BMW 640D F Series 3.0 Diesel (14–18) 308 BHP Twin Turbochargers are known for delivering an impressive balance of torque, refinement and efficiency. But for many enthusiasts, the stock N57 diesel platform has far more potential waiting to be unlocked. That is where a hybrid bi‑turbo upgrade steps in. Engineered specifically for the N57 D30 B engine, this uprated turbocharger set transforms the way your 640d or other F‑Series 3.0d model drives, offering sharper response, higher airflow and huge tuning headroom—without sacrificing reliability.
If you're researching BMW diesel turbo upgrades, N57 hybrid turbo kits or high‑flow bi‑turbo replacements, this guide explains what this performance‑focused setup does, why it's beneficial and what to expect when upgrading.
What This Hybrid Turbocharger Set Is
This product is a high‑flow hybrid turbocharger package built as a direct replacement for the BMW 640D F Series 3.0 Diesel (14–18) 308 BHP Twin Turbochargers. Designed for all compatible N57 D30 B engines (2012–2018), it replaces both the small and large turbos with upgraded, re-engineered units. These turbos use billet compressor wheels, precision‑machined housings and upgraded thrust components to dramatically improve airflow and response.
The kit is based around OE turbocharger part numbers such as 5326‑970‑0010, 5440‑970‑0013, 5326‑970‑0015 and 5440‑970‑0026. Matching your original numbers ensures perfect fitment and compatibility.
Unlike cheap aftermarket alternatives, this hybrid set is engineered, machined and assembled in house, then VSR balanced to ensure smooth, long‑term reliability suitable for fast‑road and tuned diesel applications.
How the Upgraded Twin Turbochargers Improve Performance
The factory N57 biturbo setup is strong, but the airflow limits of the OE compressor wheels and housings restrict power once tuning begins. This hybrid kit addresses those limitations with significant mechanical improvements, including:
- Over‑sized billet hi‑flow compressor wheels
- Machined and polished compressor housings for greater airflow
- Upgraded 360‑degree thrust bearings
- Stepped‑gap piston ring on the small turbo
- Carefully calibrated fast‑road specification
- Full VSR balancing for OE‑smooth refinement
The result is dramatically faster spool, stronger mid‑range torque and the ability to sustain high‑RPM airflow—exactly what BMW diesel tuning enthusiasts want. With the correct supporting modifications and ECU calibration, these hybrid BMW 640D F Series 3.0 Diesel (14–18) 308 BHP Twin Turbochargers can support around 460+ bhp.
Benefits of Installing a Hybrid Turbo Upgrade
Upgrading to a hybrid bi‑turbo set is one of the most transformative performance modifications for any N57-powered BMW. Key advantages include:
- Real-world acceleration gains: Faster turbo spool gives stronger low‑end response, ideal for daily driving and overtaking.
- Expanded tuning potential: Perfect for remapped or fully custom‑tuned diesel builds aiming for 400–460+ bhp.
- Improved top‑end power: High‑flow wheel and housing designs maintain airflow where stock turbos taper off.
- Increased reliability: Billet wheels and upgraded thrust components handle higher boost with ease.
- Smoother operation: VSR balancing ensures vibration-free performance, reducing wear on engine and drivetrain.
- OEM‑level compatibility: No unnecessary modifications—just precise engineering tailored for the N57 engine.
This makes the upgrade ideal for anyone looking to improve performance while retaining everyday drivability, from spirited road use to long‑distance motorway cruising.
Practical Use Cases for Car Owners
Whether you drive a 640d, 740d, 535d or X5/X6 with the N57 D30 B engine, this hybrid turbocharger set offers tangible benefits in real‑world driving scenarios:
- Faster overtaking: The improved mid‑range torque makes passing slower traffic effortless.
- Smoother motorway acceleration: Sustained airflow prevents power drop-off at higher speeds.
- Better towing performance: Enhanced low‑end boost helps maintain momentum under load.
- Ideal for tuned builds: Perfect foundation for remapping, intercooler upgrades and exhaust modifications.
- Long‑term durability: Reinforced internals offer peace of mind under increased boost pressures.
Enthusiasts wanting a stronger, more responsive diesel that still feels refined will appreciate how naturally this upgrade integrates into the BMW driving experience.
Important Ordering and Fitment Information
Because these hybrid BMW 640D F Series 3.0 Diesel (14–18) 308 BHP Twin Turbochargers are precision‑engineered, there are some important service details to note:
Exchange service is not available. If ordering the remanufacture option, you must send in your own turbochargers for conversion. The small turbocharger must be in perfect working order before hybridisation.
If required, courier collection can be arranged. Professional fitting is strongly recommended, and installation can be booked with MJ Modifications in Warwickshire. For quotes and arrangements, contact info@mjmodifications.co.uk.
Why This Turbo Upgrade Is a Trusted Choice
This hybrid bi‑turbo set is not a generic aftermarket part. It has been tested, fitted and used extensively by both the engineers who designed it and their customers. Drivers consistently praise the improved punch, smoother power delivery and high build quality.
For anyone searching online for BMW diesel hybrid turbo upgrades, N57 biturbo replacements, high‑flow 3.0d turbochargers or fast‑road diesel performance kits, this is a proven, high‑quality solution that delivers real gains—without sacrificing drivability or reliability.
If you're ready to unlock the true potential of your BMW 640D F Series 3.0 Diesel (14–18) 308 BHP Twin Turbochargers, this hybrid upgrade is one of the most effective and rewarding modifications you can make.