BMW E87 LCI E90 120d 320d N47 Dual Twin Mass Flywheel Gearbox Automatic 4150552

BMW E87 LCI E90 120d 320d N47 Dual Twin Mass Flywheel Gearbox Automatic is a precision drivetrain component designed to work with the N47 engine and automatic transmission. It is responsible for smooth torque transmission, reduction of torsional vibrations, and comfortable gear shifting. Thanks to its factory design from the Flywheels and gears group, it ensures a perfect fit for the power unit and transmission.

Specifications and technical data

• SKU: 7637279-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7637279
• Substitutable numbers: 21207637279, 7637279, 21207577479, 7577479, 21207567829, 7567829, 21208631807, 8631807, 21207615627, 7615627, 21207628091, 7628091, 415055210, 4150552
• Gearbox type: Automatic
• Category: Flywheels & Flexplates

Purpose and technical compatibility

The presented dual-mass flywheel has been designed for use in BMW 1 Series E87 LCI and 3 Series E90 models with the N47 unit in 120d and 320d versions. The construction is adapted for use with an automatic transmission, which is crucial for proper vibration damping and protecting the transmission from overloads. The component comes from the BMW OEM parts family, which in practice means maintaining factory operating parameters and assembly geometry.

Operating characteristics of the dual-mass flywheel

The dual-mass flywheel in the N47 engine acts as a buffer between the crankshaft and the automatic transmission. The applied system of springs and torsional dampers limits the transfer of engine operating irregularities to the gearbox, which translates into:

• reduced noise and vibration in the cabin,
• smoother starting and gear shifting,
• lower loads on transmission components,
• more stable drivetrain operation at low RPMs.

By maintaining the original design, the flywheel works correctly with the factory transmission control software and the torque characteristics of the N47 engine.

Benefits of using an original BMW flywheel

Choosing a used, original dual-mass flywheel for the BMW E87 LCI and E90 with an N47 engine is a solution that allows you to combine reasonable costs with maintaining the proper operating parameters of the drivetrain. The most important advantages include:

• factory fitment for the engine and automatic transmission,
• preservation of the vibration damping characteristics intended by the manufacturer,
• reduced risk of adaptation and compatibility issues, typical for aftermarket replacements with uncertain parameters,
• possibility of economical repair while maintaining proper drivetrain refinement.

An element selected in this way is particularly important in cars used on a daily basis, where predictable drivetrain behavior and the stability of the automatic transmission are essential.

Professional installation and service recommendations

The dual-mass flywheel requires precise installation in accordance with the manufacturer's procedures. In practice, this means the necessity of:

• using the correct bolt tightening torques,
• inspecting the cooperating drivetrain components,
• checking the condition of the automatic transmission accessories.

To achieve stable drivetrain operation, it is worth entrusting the installation to a specialized service center that has experience with N47 units and BMW automatic transmissions. This minimizes the risk of incorrect installation and premature wear of the component.

Drivetrain expansion and category offer

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, selected gears, or related torque transmission components, check the available parts in the BMW Flywheels and gears category.

Used parts vs. tuning and cost optimization

For cars with the N47 engine, many users combine drivetrain repair with light tuning or optimization of the unit's operating characteristics. Used OEM components, such as the dual-mass flywheel, allow you to maintain a proper mechanical base on a reasonable budget. If you want to better plan modifications and consciously choose components, the article The best used parts for tuning your car will be helpful, where you will find practical tips on using used subassemblies.

For those who pay attention to the ecological and economic aspects of repairs, an interesting supplement will also be the material describing the impact of reusing drivetrain components on the environment and the household budget: Circular economy in your garage – how choosing used parts from dismantling really supports environmental protection and your wallet?.