BMW F12 Propshaft Automatic Gearbox Drive Shaft 640i N55 L=1508MM 7632630

BMW F12 Propshaft Automatic Gearbox Drive Shaft 640i N55 is an original drivetrain component designed to work with the engine and automatic transmission. Thanks to its precise construction and properly selected length, it ensures a stable connection between the gearbox and the rear drivetrain, which translates into smooth torque transfer and driving comfort. This solution is dedicated to users looking for a proven, used OEM component with preserved functionality.

Specifications and technical data

• SKU: 7632630
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7632630
• Substitutable numbers: 7632630, 26107632630, 8693401, 26108693401
• Fuel type: Diesel
• Gearbox type: Automatic
• Part type: Propshaft
• Category: Propshafts

Purpose and compatibility

The presented drive shaft has been designed for the BMW 6 Series F12 model in the 640i version with the N55 engine, equipped with an automatic transmission. The design is adapted to the vehicle's drivetrain, which guarantees adequate resistance to the loads characteristic of high-torque units. The appropriate length of the shaft ensures correct positioning in the central tunnel and proper cooperation with suspension components and the final drive.

Construction and technical characteristics

The drive shaft belongs to the group of components known as Cardan joints, which means the use of universal joints that allow for the compensation of suspension movements and slight axial deviations between the gearbox and the rear drivetrain. This type of solution minimizes vibrations and limits the transfer of unwanted oscillations to the body, which is important for both comfort and the durability of other drivetrain components.

The properly selected diameter of the support tube and the design of the joints allow for safe operation at high rotational speeds of the shaft. The use of original geometry and factory mounting points facilitates installation and ensures proper balancing, which is crucial for the stable operation of the drivetrain across the entire vehicle speed range.

Function in the drivetrain

The drive shaft in this BMW model is responsible for transferring torque from the automatic transmission to the rear final drive. In practice, this means that its technical condition has a direct impact on:

• smoothness of acceleration and gear shifting,
• level of vibrations felt in the cabin,
• noise generated while driving at higher speeds,
• loads transferred to the gearbox and differential.

A functional drive shaft reduces the risk of play, knocking, and unwanted vibrations, which in the long run can lead to accelerated wear of other drivetrain elements. Replacing a worn shaft with an original used component is often an economical and technically sound solution in the event of symptoms such as vibrations during acceleration or noise from the central tunnel.

Benefits of using an original BMW shaft

Using a factory BMW drive shaft ensures the preservation of the original drivetrain operating parameters. The original part is designed taking into account the engine characteristics, automatic transmission gear ratios, and suspension geometry, which translates into:

• secure fit to mounting points on the body and drivetrain components,
• proper balancing that limits vibrations at high speeds,
• consistent cooperation with joints and drivetrain supports,
• maintaining the factory handling characteristics and driving comfort.

For users who value original manufacturer solutions, choosing such a component is a way to maintain predictable vehicle behavior and reduce the risk of problems resulting from inaccurate fitment of aftermarket parts.

Condition, application, and selection of parts

The offered drive shaft is a used item, which allows for the optimization of repair costs while maintaining the original BMW design. This type of component is particularly recommended in situations where the current shaft shows signs of wear, mechanical damage, or balancing issues. When selecting a part, it is worth paying attention to compatibility with the body version, engine type, and the automatic transmission used to ensure full installation compatibility.

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 intermediate shafts, universal joints, or shaft supports, check the available parts in the BMW Cardan Joints category.

Additional information and selection support

When choosing between a new and a used drivetrain component, it is worth analyzing the cost-to-expected-durability ratio and the importance of the original origin of the part. Comparing typical repair and maintenance scenarios, including the differences between OEM components and aftermarket parts, can be helpful. To better understand these aspects and make an informed purchasing decision, read the article New or used? A comparison of costs and quality of car parts, where you will find practical examples and answers to frequently asked questions.