Restoration of the 3 Turbochargers on the BMW M550d xDrive – BG Turbo Expertise on the N57 Engine

Presentation of the BMW M550d xDrive

The BMW M550d xDrive is one of the most powerful diesel vehicles ever produced by the German manufacturer. Sold between 2012 and 2014, it is powered by the N57D30S1 engine, a 3.0-liter inline six-cylinder developing up to 381 horsepower and 740 Nm of torque. This exceptional performance level is achieved thanks to a highly advanced and complex turbocharging system.

This engine is also found in several high-end BMW models, including the 7 Series, X5 M50d and X6 M50d, combining high performance, strong low-end torque and controlled fuel consumption.

A unique triple turbocharger architecture

The key technical feature of the N57D30S1 engine lies in its triple turbocharging system. This configuration uses three distinct turbochargers: two low-pressure turbochargers and one high-pressure turbocharger operating sequentially. This setup ensures immediate response at low engine speeds while maintaining strong power delivery at higher RPM.

When service is required, all three turbochargers must be considered as a single, integrated system. Restoring only one turbocharger without addressing the others can lead to imbalance, mechanical stress and premature wear. At BG Turbo, we always approach this engine as a complete system and intervene on all three turbochargers to ensure reliability, performance and long-term durability.

Turbocharger restoration for the BMW M550d at BG Turbo

BG Turbo is fully equipped to restore the turbochargers fitted to the BMW M550d xDrive, including BorgWarner B2 and B2G models. Each turbocharger is fully disassembled, inspected and rebuilt following a strict and proven process.

The restoration includes complete cleaning of the housings, replacement of all wear components, precise clearance checks, dynamic balancing of the rotating assembly and final validation. This ensures performance equivalent to original specifications and full compatibility with related systems such as the intercooler and diesel particulate filter.

To submit a repair request, please use our dedicated form:
https://www.bg-turbo.com/reparation-renovation-reconditionnement

Why choose BG Turbo

BG Turbo is a French workshop specialized in turbocharger restoration and repair for all brands. Our expertise covers both modern, highly complex applications such as the BMW M550d and classic or performance vehicles.

We also maintain a stock of more than 2,000 turbochargers ready for shipment throughout France and Europe. This strong logistics capability, combined with true artisanal know-how, allows us to offer fast, reliable and technically precise solutions, even for the most advanced turbocharging systems on the market.

Parts list

Part Number : 12739880010
Previous Version : 1273-988-0010, 12739880001, 12739880009, 12739880010, 12739880018, 1273 988 0010, 1273 988 0009
OE Number : 11658506382, 11658516125, 8506382, 8516125, 116585063827
Year : 2012-14
Description : BMW M550d x Drive 750, 550 M, X5 M, X6 M
Manufacturer Part Number : 12739700009, 12739710009, 12739700010, 12739710010, 1273-970-0009, 1273-971-0009, 1273-970-0010, 1273-971-0010, 1273-970-0018
Turbo Model : B2, B2G
CHRA : available, made in USA
Engine Manufacturer : BMW
Engine : N57D30S1
Displacement : 3.0L, 2993 cc
Power : 280 / 381 hp
Max RPM : 4400
Fuel : Diesel
Note : Intercooler, DPF = Diesel Particulate Filter
Manufacturer : BorgWarner – 3K – Schwitzer

53039700523 - VA AVEC LE 12739700018 ET 53039700522 - TRITURBO

Applications

BMW 750 d 3.0 (F01/F02) – N57D30S1 engine
BMW M550d 3.0 (F10/F11) – N57D30S1 engine
BMW X5 3.0 M50d (E70) – N57D30S1 engine
BMW X5 3.0 M50dX (F15) – N57D30S1 engine
BMW X6 3.0 M50d (E71) – N57D30S1 engine

FAQ

Can BG Turbo restore all three turbochargers on the BMW M550d?
Yes. BG Turbo specializes in multi-turbo systems and restores all three turbochargers to ensure correct operation and long-term reliability.

Is it necessary to restore all three turbochargers at the same time?
In most cases, yes. Partial intervention can create imbalance and reduce the lifespan of the remaining turbochargers.

Are restored turbochargers fully compatible with BMW original systems?
Yes. All restorations follow original specifications and ensure full compatibility with the engine, DPF and intercooler.

Hashtags

#BGTurbo
#BMWM550d
#N57
#TripleTurbo
#BMWTurbo
#TurboRestoration
#DieselPerformance
#BorgWarner
#X5M50d
#X6M50d

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