Flywheel Ring BMW E90 LCI F10 F30 F31 Diesel N57 N57N Automatic Gearbox 8506670

Flywheel Ring BMW E90 LCI F10 F30 Diesel Automatic Gearbox is an original component from the Flywheels and gears group, designed for BMW drivetrains with diesel engines and automatic transmissions. The carefully selected specification ensures proper torque transfer, stable drivetrain operation, and correct interaction with the automatic transmission torque converter.

Specifications and technical data

• SKU: 8506670
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8506670
• Substitutable numbers: 11228506670, 8506670, 11227800051, 7800051, BG
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Flywheels & Flexplates

Purpose and compatibility

The presented flywheel is dedicated to BMW E90 LCI, F10, and F30 series models with a Diesel engine, equipped with an automatic transmission. Using the correct flywheel in this type of system is crucial for the proper operation of the starter, smooth engine start, and idle speed stabilization.

The component belongs to the Flywheels and gears group, which means it works directly with the starter ring gear and the drivetrain. Proper geometry and fitment for specific generations of BMW power units minimize the risk of torsional vibrations and unwanted noise during drivetrain operation.

Technical and functional characteristics

The flywheel in an automatic transmission system acts as a buffer between the crankshaft and the torque converter. In the case of diesel units, where high torque is generated even at low RPMs, the properly selected mass and design of the flywheel allow for:

• damping of vibrations generated by the diesel engine,
• stabilization of drivetrain operation during load changes,
• proper interaction with the starting system,
• maintaining smooth gear shifts in the automatic transmission.

Thanks to the use of the original BMW design, the correct drivetrain operating characteristics are maintained, in accordance with the manufacturer's factory specifications. This is particularly important for modern diesel units, where the drivetrain is precisely tuned to the control electronics.

Use in service practice

Replacing the flywheel is recommended, among other things, when symptoms such as increasing vibrations during acceleration, metallic noises from the transmission area, or starting problems resulting from improper engagement with the starter occur. Using the appropriate element from the Flywheels and gears group allows for restoring proper drivetrain refinement and reducing loads transferred to the automatic transmission.

The product is marked as Used, which in service practice means the possibility of an economical repair while maintaining the original manufacturer's specification. This is a solution often chosen for comprehensive drivetrain overhauls in vehicles used intensively, where it is important to combine quality with reasonable cost.

Benefits of using an original BMW flywheel

Selecting the right flywheel for a diesel engine with an automatic transmission translates into a number of practical benefits:

• Stable engine operation – reduction of vibrations and jerking during acceleration and gear changes.
• Better interaction with the automatic transmission – maintaining factory gear shifting characteristics and throttle response.
• Protection of associated components – lower loads on the torque converter, crankshaft, and engine mounts.
• Consistency with the factory BMW design – fitment for specific generations of power units and control software.

A drivetrain configured in this way allows for maintaining predictable vehicle behavior, which is important both in daily use and during more dynamic highway driving.

Drivetrain expansion and additional information

If you are planning a comprehensive repair or upgrade of the engine and drivetrain area in your BMW and need other elements from the same group, such as additional gears, components interacting with the starter, or torque transfer components, check the available parts in the BMW Flywheels and gears category.

For those who treat repairs as an opportunity to modify the car's characteristics, a guide describing how to consciously select used drivetrain components for durability and cost-effectiveness may be useful. More practical tips can be found in the article The best used parts for tuning your car, where, among other things, the approach to selecting components in modernization projects is discussed.