Turbocharger 11657823255 11657823256 54359700060

The BV35 Turbocharger, part numbers 11657823255, 11657823256, and 54359700060, is a high-performance, 

compact turbocharger specifically engineered for the BMW 125D F20 equipped with the N47S1 2.0L diesel engine. 

This turbocharger plays a crucial role in enhancing engine performance, fuel efficiency, and driving dynamics. 

As a variable geometry turbo (VGT), the BV35 delivers optimal power across a wide range of engine speeds, 

making it ideal for both city and highway driving conditions.

1. Application and Vehicle Compatibility

This BV35 turbocharger is an original equipment (OE) fit for the BMW 125D F20 model, specifically those equipped with the 2.0-liter N47S1 diesel engine. 

The N47S1 is a refined version of the widely used N47 engine family, featuring advanced common-rail direct injection and turbocharging technology. 

The engine produces 160 kW (218 HP), and the BV35 turbocharger is designed to support this performance level with precision and reliability.

Compatible Vehicles:

• BMW 125D F20 (2012-2015)

• Engine: N47S1, 2.0L Diesel, 160 kW / 218 HP

OEM and Turbo Reference Numbers:

• OEM: 11657823255 / 11657823256

• Turbocharger Manufacturer Part Number: 54359700060

• Other Cross-Reference Numbers: 5435-970-0060, 54359880060, 7823255, 7823256

2. Technical Specifications

• Turbo Model: BV35 (BorgWarner)

• Technology: Variable Geometry Turbocharger (VGT)

• Compressor Housing: Aluminum alloy, optimized for lightweight and heat resistance

• Turbine Housing: High-temperature ductile iron for durability under extreme conditions

• Bearing Type: Journal bearing with high-speed oil-lubrication system

• Cooling System: Oil-cooled with some variants using water-cooling support

• Boost Pressure: Designed to deliver optimized boost based on engine load and RPM

3. Performance and Efficiency

The BV35 is known for its excellent response characteristics. Thanks to its variable geometry turbine (VGT), 

it adapts to varying exhaust flow levels by adjusting the vane positions. This results in minimal turbo lag, faster throttle response, and higher torque at low RPMs. 

When cruising at higher speeds, the vanes open up to allow maximum exhaust flow, contributing to fuel efficiency and engine performance.

For the BMW 125D, the BV35 allows the 2.0L N47S1 diesel engine to deliver a torque-rich driving experience, 

with smooth acceleration and reduced emissions. The turbocharger ensures:

• Faster spool-up time, especially at low engine speeds

• Enhanced torque curve, providing maximum power when needed

• Improved fuel economy, particularly during highway cruising

• Reduced emissions, aligning with Euro 5/6 standards

4. Construction and Materials

The BV35 turbocharger is manufactured by BorgWarner, a global leader in turbocharging technology.

 It is constructed using high-quality materials to ensure long service life and performance stability even under harsh operating conditions.

• Turbine Wheel: Made from Inconel (a nickel-based superalloy), capable of withstanding extreme exhaust temperatures

• Compressor Wheel: Precision-machined aluminum, designed for maximum airflow and durability

• Actuator: Electronic actuator for precise control of the VGT mechanism, improving response and emissions control

All components are designed to OEM specifications, ensuring a direct-fit replacement with no modifications required.

5. Installation and Replacement

When replacing or upgrading to the BV35 turbocharger, it's essential to follow OEM installation guidelines. Proper installation ensures long-term 

performance and avoids common issues such as oil leakage, overboost, or turbo failure.

Installation Tips:

• Always prime the turbocharger with clean engine oil before installation

• Ensure the oil feed and return lines are free from carbon buildup and debris

• Replace the air and oil filters and use high-quality synthetic engine oil

• Reset the engine control unit (ECU) if necessary to adapt to the new turbocharger

If you're installing a remanufactured or aftermarket version, make sure it comes from a reputable supplier and that it meets OEM specifications.

6. Common Issues and Maintenance

While the BV35 turbocharger is robust and built to last, proper maintenance of the engine and turbo system is crucial for optimal performance.

Common issues include:

• Oil starvation due to clogged feed lines or poor maintenance

• Excessive carbon buildup in the VGT mechanism, leading to sticking vanes

• Boost leaks caused by damaged intercooler piping or gaskets

• Actuator failure, especially in older or high-mileage vehicles

To avoid these issues:

• Use only high-quality synthetic oil and change it at regular intervals

• Keep the air intake and EGR systems clean

• Allow the engine to idle for 30–60 seconds before shutting off to cool the turbo

7. Aftermarket and Remanufactured Options

Many reputable turbocharger suppliers offer remanufactured or new aftermarket versions of the BV35 (54359700060) turbocharger. 

These options are often more cost-effective while maintaining performance and reliability. When purchasing aftermarket options, ensure:

• The turbo is balanced and tested

• Internal components such as bearings and seals are brand new

• The turbo comes with a warranty, preferably 12 months or more

• The supplier provides technical support and proper installation guidelines

8. Conclusion

The BV35 Turbocharger (11657823255 / 11657823256 / 54359700060) is a vital component for maintaining the performance, 

efficiency, and reliability of the BMW 125D F20 with the N47S1 engine. With its advanced variable geometry technology and high-quality construction, 

this turbocharger offers excellent throttle response, improved fuel economy, and consistent power delivery across all driving conditions.

Whether you are replacing a failed unit or upgrading for better performance, the BV35 offers the perfect blend of German engineering 

precision and BorgWarner turbocharging expertise. For any BMW 125D owner looking to maintain OEM standards or enhance vehicle responsiveness, 

this turbo is an excellent choice.