GKN Loebro 306358 CV Axle Assembly - Front Left

OE-Style Front Left CV Axle for BMW xDrive

GKN Loebro 306358 is a front left CV axle assembly built for BMW xDrive applications that need precise torque transfer and OE-level driveline geometry. It uses GKN Automotive Face Spline technology to reduce connection complexity while maintaining strong wheel-hub engagement.

Compatible with select BMW 230i xDrive, 330i xDrive, 430i xDrive, 440i xDrive, M240i xDrive, and other xDrive models listed below, this axle is engineered around the original fitment dimensions and spline counts for accurate replacement service.

Key Features

• Part number 306358
• Front left CV axle assembly for BMW xDrive driveline service
• Compressed length: 21.653 in.
• Inboard spline quantity: 27
• Outboard spline quantity: 31
• Inboard joint type: Plunging Joint AAR
• Outboard joint type: Fix Ball Joint UF with Face Spline connection
• Axle nut thread size: M16x1.5x72
• Axle nut not included
• OE technology from GKN Automotive

Product Details

GKN Loebro 306358 is built for front left applications where the axle must transmit torque smoothly while accommodating suspension movement and steering input. The Face Spline hub connection is used in premium driveline designs because it simplifies the shaft-to-hub interface and supports efficient power delivery at the wheel. This part cross-references 7638777 and 31607597693 for the same application.

Use this axle on BMW 230i xDrive, BMW 330i xDrive, BMW 430i xDrive, BMW 440i xDrive, BMW M240i xDrive, BMW 320i xDrive, BMW 328i xDrive, BMW 328d xDrive, BMW 335i xDrive, BMW 340i xDrive, BMW 428i xDrive, BMW 435i xDrive, and related listed models when the original front left axle matches the stated spline and length specifications. Part number 306358 is also referenced in OE-style replacement searches for BMW xDrive front axle service.

Common Problems This Axle Can Address

• Clicking or popping during turns from worn CV joints
• Vibration under acceleration from a damaged axle shaft
• Grease leakage from a failed axle boot or joint seal
• Clunking or looseness in the front driveline
• Loss of smooth torque transfer to the front wheel hub

Installation Notes and Tips

Verify the vehicle’s front left position, compressed length, spline counts, and axle nut thread size before installation. Confirm Face Spline hub connection requirements and compare the original axle to the replacement part number 306358 to ensure correct application. Inspect related hub, seal, and mounting surfaces during service so the new axle seats properly and operates without binding.

Quality Assurance

GKN Automotive supplies driveline technology to premium vehicle manufacturers, and this Loebro axle reflects that OE-focused engineering approach. It is built to match the original application requirements for BMW xDrive front left service.

• Fits 2021 BMW 230i xDrive, Front Left
• Fits 2021 BMW M240i xDrive, Front Left
• Fits 2017-2020 BMW 230i xDrive, Front Left
• Fits 2017-2020 BMW 430i xDrive, Front Left
• Fits 2017-2020 BMW 430i xDrive Gran Coupe, Front Left
• Fits 2017-2020 BMW 440i xDrive, Front Left
• Fits 2017-2020 BMW 440i xDrive Gran Coupe, Front Left
• Fits 2017-2020 BMW M240i xDrive, Front Left
• Fits 2017-2019 BMW 330i GT xDrive, Front Left
• Fits 2017-2019 BMW 330i xDrive, Front Left
• Fits 2017-2019 BMW 340i GT xDrive, Front Left
• Fits 2019 BMW M240i xDrive, Front Left
• Fits 2013-2018 BMW 320i xDrive, Front Left
• Fits 2014-2018 BMW 328d xDrive, Front Left
• Fits 2016-2018 BMW 340i xDrive, Front Left
• Fits 2015-2016 BMW 228i xDrive, Front Left
• Fits 2014-2016 BMW 328i GT xDrive, Front Left
• Fits 2013-2016 BMW 328i xDrive, Front Left
• Fits 2014-2016 BMW 335i GT xDrive, Front Left
• Fits 2014-2016 BMW 428i xDrive, Front Left
• Fits 2015-2016 BMW 428i xDrive Gran Coupe, Front Left
• Fits 2014-2016 BMW 435i xDrive, Front Left
• Fits 2015-2016 BMW 435i xDrive Gran Coupe, Front Left
• Fits 2015-2016 BMW M235i xDrive, Front Left
• Fits 2013-2015 BMW 335i xDrive, Front Left