BMW E81 E87 LCI E90 E91 Inlet Camshaft Adjustment Unit N47 Diesel 7797512

BMW E81 E87 LCI E90 E91 Inlet Camshaft Adjustment Unit N47 Diesel is a precision timing system component designed for BMW diesel engines. It is responsible for the dynamic control of the intake camshaft position, which translates into stable engine operation, correct torque characteristics, and predictable throttle response. Thanks to the use of the original BMW design, this Inlet Camshaft Adjustment Unit ensures proper cooperation with the factory engine control unit and auxiliary equipment.

Specifications and technical data

• SKU: 8575435
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8575435
• Substitutable numbers: 8575435, 11318575435, 8509118, 11318509118, 7797512, 11317797512
• Fuel type: Diesel
• Category: Camshafts

Purpose and function in the N47 Diesel engine

The presented adjustment unit operates in the intake timing system of N47 family diesel engines, used in models such as the BMW 1 Series E87 LCI and 3 Series E90. Its task is to change the valve timing depending on load and engine speed, which allows for optimizing cylinder air filling, reducing fuel consumption, and maintaining correct exhaust emission parameters. A properly functioning adjustment unit supports smooth idling, seamless acceleration, and correct cooperation with the turbocharger.

Benefits of using the original adjustment unit

In a diesel engine timing system, maintaining the accuracy of camshaft angle control is crucial. Using the original BMW Inlet Camshaft Adjustment Unit allows you to:

• maintain factory engine performance parameters across the entire rev range,
• minimize the risk of engine control unit errors related to incorrect phase adjustment,
• ensure compatibility with existing equipment and ECU software,
• reduce unwanted vibrations and rough idling at low RPMs.

For users, this means more predictable vehicle behavior, stable performance, and the possibility of further diagnostics and service in accordance with manufacturer procedures. In the case of N47 engines, where timing control precision is of great importance, using the appropriate adjustment unit is particularly essential.

Characteristics of the Camshafts category for BMW

Components from the Camshafts category and related adjustment units are responsible for synchronizing valve operation with piston movement. In modern BMW diesel engines, such as the N47, this system is expanded with variable valve timing control, which requires the use of dedicated adjustment modules. Replacing a worn adjustment unit with a proven component from the same group allows for restoring correct timing operation without interfering with the engine structure. This is a particularly beneficial solution for servicing intensively used vehicles, where both durability and compliance with factory specifications are important.

Condition, fitment, and service application

The offered adjustment unit comes from a group of used parts, which allows for economical repair while maintaining the original BMW specification. This is a solution often chosen in situations where it is necessary to replace a component responsible for camshaft control, and the priority is matching the specific engine type and vehicle generation. Before installation, a standard service procedure is recommended: verifying the oil system for leaks, checking the mechanical condition of the timing system, and performing adaptation in the engine control unit according to the manufacturer's guidelines.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as additional adjustment units, cooperating control elements, or related timing components, check the available parts in the BMW Camshafts category.

Additional technical and operational information

The Inlet Camshaft Adjustment Unit works with the engine lubrication system, so when replacing it, it is worth paying attention to oil quality and adherence to service intervals. In the event of symptoms such as power loss, camshaft position errors, or rough operation on a cold engine, diagnosing this component is one of the basic steps. Choosing an original adjustment unit allows you to reduce the risk of compatibility issues that may occur when using replacements with uncertain parameters.

For drivers interested in the broader context of how drive systems work in BMW cars and other premium brands, information on the design and service of modern all-wheel-drive systems may be useful – you can find them in the article xDrive, 4Matic, quattro or 4Motion – a comparison of AWD systems from BMW, Mercedes, Audi, and VW, which discusses, among other things, the cooperation of key sub-assemblies with the power unit.