Rear Driveshaft BMW F10 F11 N20 N47N N55 N57 Axle Left N/S Shaft 7581021 D=31MM

BMW F10 F11 N20 N47N N55 N57 Rear Axle Shaft Left Rear is an original drivetrain component from the Drivetrain Mounts & Brackets category, designed for installation on the rear left axle. This used, factory part ensures proper torque transfer to the wheel, maintaining the performance characteristics intended by the BMW manufacturer. It's a practical solution for drivers looking to restore correct drivetrain operation without altering the vehicle's structure.

Specifications and technical data

• SKU: 7581021
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7581021
• Substitutable numbers: 33207581021, 7581021
• Location on the vehicle: Rear, Left
• Category: Drivetrain Hardware & Fasteners

Vehicle Application and Placement

The presented axle shaft is dedicated for installation on the rear left side of BMW F10 and F11 vehicles equipped with N20, N47N, N55, and N57 engines. Correct placement on the vehicle is crucial for maintaining proper suspension geometry and even power distribution to the wheel. Thanks to its factory fitment for a specific axle and side of the body, this component works seamlessly with other drivetrain parts without requiring modifications.

Technical Characteristics and Drivetrain Function

The rear axle shaft is responsible for the stable transfer of torque from the differential to the wheel, while simultaneously compensating for suspension movements and body roll. The original BMW design ensures:

• maintenance of the driveshaft's proper torsional stiffness,
• correct interaction with the CV joints and wheel hub,
• appropriate working length matched to the rear axle geometry,
• compatibility with factory mountings and boots.

This ensures the drivetrain operates under stable conditions, and dynamic loads are distributed according to the manufacturer's specifications. Using an original axle shaft minimizes the risk of vibrations, noises, and accelerated wear of related components.

Benefits of Using an Original BMW Axle Shaft

Choosing an original rear axle shaft for your BMW F10/F11 offers a range of practical advantages for everyday driving:

• Factory Fitment – maintains the correct wheel position relative to the hub and differential, with no need for modifications.
• Suspension System Cohesion – proper interaction with control arms, shock absorbers, and mounting components.
• Reduced Risk of Failure – using a component designed for a specific platform reduces the risk of overloading and CV joint leaks.
• Stable Vehicle Handling – even power transfer to the rear axle contributes to predictable vehicle behavior during acceleration and load changes.

Condition, Origin, and Purchase Value

This part comes from the BMW offering and is classified as used, allowing for the combination of factory construction with a favorable purchase price. For many users, this represents a sensible compromise between cost and maintaining the original drivetrain performance parameters. If you have doubts about choosing between a new and used part, it's worth consulting the analysis in the article New or Used? A Comparison of Car Part Costs and Quality, which discusses differences in durability, cost-effectiveness, and fitment of OEM parts.

Selection and Other BMW Drivetrain Mounts & Brackets

When replacing the rear axle shaft, it is recommended to check the condition of other components within the Drivetrain Mounts & Brackets group, such as mounts, brackets, and associated parts around the rear axle. If you are looking for other components from the same category dedicated to this brand, check the available BMW Drivetrain Mounts & Brackets to assemble a complete repair kit based on compatible, factory solutions.