BMW 1 3 Series E87 E90 E91 Petrol N45 N46 118i 320i Flywheel Automatic 7520429

BMW 1 3 Series E87 E90 E91 Petrol N45 N46 118i 320i Flywheel Automatic is an original drivetrain component designed for BMW vehicles with petrol engines and automatic transmissions. A used flywheel of this class allows for an economical yet technically sound repair of the drivetrain system. It is a solution for users who expect factory-fit quality without the need to invest in a new part.

Specifications and technical data

• SKU: 7520429
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7520429
• Substitutable numbers: 11227520429, 7520429
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Flywheels & Flexplates

Purpose and function of the flywheel

The flywheel in a BMW automatic transmission is responsible for the stable transfer of torque from the engine crankshaft to the transmission system. In the version dedicated to petrol units, it ensures:

• proper cooperation with the torque converter,
• correct damping of torsional vibrations generated by the engine,
• maintenance of smooth drivetrain operation during load changes.

Thanks to this, the drivetrain operates stably, and gear changes in the automatic transmission occur in a predictable and comfortable manner.

Benefits of using an original BMW flywheel

Choosing an original flywheel from the Flywheels and gears group for BMW allows you to maintain the parameters specified by the vehicle manufacturer. In practice, this means:

• precise fitment to the crankshaft and automatic transmission,
• preservation of factory geometry and balance,
• reduction of the risk of improper installation or premature wear of other drivetrain components.

A used OEM element is particularly beneficial for repairs where rational service costs are important while maintaining compliance with factory specifications.

Application in vehicles with petrol engines and automatic transmissions

The presented flywheel is intended for BMW vehicles with petrol engines equipped with an automatic transmission. Such a combination requires a component with appropriately selected mass and stiffness characteristics to:

• ensure smooth starting and acceleration,
• minimize vibrations felt in the cabin,
• maintain stable engine operation at low and medium RPMs.

As a result, the flywheel is an important element influencing driving comfort and drivetrain refinement in daily use.

Professional use in repairs and tuning

A used BMW flywheel works well both in standard service repairs and in projects where the vehicle owner plans drivetrain modifications while retaining OEM parts. If you are interested in a broader context regarding the use of used components in modernization projects, it is worth reading the article The best used parts for tuning your car, which discusses a practical approach to selecting such components.

Expanding the BMW drivetrain

If you are planning a comprehensive repair or upgrade of the drivetrain area in your BMW and need other elements from the same group, such as additional flywheels, mating gears, or related drivetrain transfer components, check the available parts in the BMW flywheels and gears category.

For drivers who want to combine repairs with a more conscious approach to vehicle operation and the use of recycled parts, the guide Eco-tuning in practice: how to increase performance while reducing your carbon footprint with recycled parts, which describes the practical aspects of such an approach, may also be helpful.