BMW X5 F15 X6 F16 M50dX Bare Engine N57X N57D30C 381HP New Timing WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a bare engine.

The engine is sold without accessories (e.g. alternator, starter motor, manifolds, injectors, turbocharger, etc.).

BMW X5 F15 X6 F16 M50dX Bare Engine N57X N57D30C 381HP New Timing WARRANTY is a factory-spec, inline diesel engine block prepared for use in high-performance M50dX versions. This used block, with its structural parameters preserved and featuring a new timing chain kit, provides a solid foundation for professional engine repair or replacement. It is an ideal solution for users expecting consistency with BMW factory specifications and high resistance to the heavy loads characteristic of high-power engines.

Specifications and technical data

• SKU: 2355858-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2355858
• Substitutable numbers: 2355858, 11002355858, 2355859, 11002355859
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Engine code: N57D30C
• Mileage: 49 000

Technical characteristics of the N57D30C engine block

The presented engine block belongs to the N57 family and is designed for diesel fuel. The six-cylinder inline construction ensures smooth operation and favorable distribution of mechanical loads within the block. The N57D30C engine code is used in M50dX versions, meaning it is engineered for high torque and the dynamic loads typical of powerful BMW X5 F15 and X6 F16 variants.

The bare engine block includes the core part of the powertrain – the block with the cylinder assembly and internal components – serving as a base for further assembly with accessories matching the specific vehicle configuration. This allows for the transfer of existing accessories from a damaged engine while maintaining the original mechanical architecture.

New timing chain and operational benefits

A significant advantage of this engine block is the new timing chain kit, which is crucial for reliability in N57 family units. Replacing timing components eliminates typical risks associated with chain and guide wear, thereby reducing the possibility of costly future failures. For workshops and users, this means a shorter list of necessary post-installation service tasks and greater predictability for future operation.

As a used engine block, it has a documented mileage, but the installation of a new timing chain significantly improves the outlook for the unit's further service life. It is a practical compromise between a full overhaul and replacing it with a completely new unit, while maintaining compliance with BMW factory specifications.

Application in BMW X5 F15 and X6 F16 M50dX

The offered engine block is intended for installation in BMW X5 F15 and BMW X6 F16 models in M50dX versions, where a high-power unit with high load resistance is required. Using an original N57 family block allows for maintaining consistency with the factory powertrain characteristics, including the xDrive drivetrain and factory engine control unit maps.

This solution is particularly beneficial in cases of severe mechanical damage to the existing unit, where repairing the block or the crankshaft assembly is not cost-effective. Replacing it with a complete engine block allows for restoring the vehicle to full functionality while maintaining the original technical configuration.

Mileage and potential for further operation

The engine has a documented mileage, which allows for a realistic assessment of its service history. Combined with the new timing chain, it provides a good base for further operation in demanding conditions typical of heavy premium SUVs. For workshops, this means the ability to offer the customer a solution with a predictable technical condition, and for the user – a reduction in the risk of unplanned vehicle downtime.

Before installation, a standard preparatory procedure is recommended, including leak testing, verification of the lubrication system, and matching accessories according to the configuration of the specific BMW X5 F15 or X6 F16 M50dX vehicle.

BMW Engines Category – selecting components

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other components from the same group, such as blocks, cylinder heads, or crankshafts, check out the available parts in the BMW Engines category.

Expert support and operation of BMW units

When planning an engine replacement, it is worth considering the experiences of users of other models from this brand. Practical tips regarding typical problems with BMW engines, diagnostic methods, and optimal service strategies can be found in the article Troublesome BMW E90 engines – check what can ruin your budget, which helps to better understand the specifics of operating modern diesel units.

If you are also interested in the economic and environmental aspects of using pre-owned components, it is worth reading the material on the circular economy and the role of used parts from dismantling in car service, which shows how conscious component selection can support both your budget and environmental protection.