GKN Loebro 306557 CV Axle Assembly - Rear Left

BMW 540i xDrive Rear Left CV Axle

GKN Loebro 306557 is a rear left CV axle assembly built for the 2017-2023 BMW 540i xDrive. It uses OE-style driveline engineering with Face Spline hub connection technology to deliver torque transfer through the joint face while reducing connection complexity and weight.

With a 713 mm overall length, 84 mm inner joint diameter, 85 mm outer joint diameter, 27 inner splines, and 37 outer splines, this axle is specified for precise fitment in the BMW 540i xDrive rear left position. Part number 306557 is a direct-reference choice for drivers searching for a BMW 540i xDrive rear left CV axle assembly.

Key Features

• Fits 2017-2023 BMW 540i xDrive, rear left
• CV axle assembly for driveline torque transfer
• 713 mm length for application-specific fitment
• 84 mm inner joint diameter with 27 inner splines
• 85 mm outer joint diameter with 37 outer splines
• Face Spline hub connection design from GKN Automotive
• Part number 306557 for catalog matching and search accuracy

Detailed Description

GKN Loebro 306557 is engineered for the rear left driveline position on the BMW 540i xDrive from 2017 through 2023. The axle assembly follows OE technology principles used in premium driveline systems, with a Face Spline joint design that transfers torque through the face of the joint rather than relying on a more complex shaft connection. That approach supports efficient power delivery at the wheel hub while keeping the connection architecture streamlined.

For buyers comparing a BMW 540i xDrive rear left CV axle assembly, the listed dimensions and spline counts are important for confirming the correct application before installation. This part number 306557 also helps streamline cross-checking against catalog listings and service records.

This part cross-references Walker Exhaust 36378 for the same application.

What It Helps Address

• Clicking or popping noises from a worn CV joint
• Vibration during acceleration from axle wear
• Torque transfer issues at the rear left wheel hub
• Boot or joint wear that affects driveline smoothness
• Fitment problems when replacing the original BMW 540i xDrive axle

Installation Notes and Tips

Confirm rear left position, 713 mm length, and spline counts before installation. Compare the removed axle to the replacement part to verify joint diameter and spline configuration match the vehicle application. Inspect surrounding driveline components, hub interfaces, and seals for wear before completing the repair.

Quality Assurance

GKN Automotive is a global driveline systems supplier, and this Loebro axle reflects OE-focused engineering used in premium vehicle applications. Part number 306557 is built to match the specified BMW 540i xDrive rear left application.