N-904-411-03 Genuine VW/Audi Front Flange Shaft Bolt - M10 x 20

Genuine VW/Audi front flange shaft bolt, part number N-904-411-03. This original M10 x 20 socket-head fastener serves the assigned axle-to-transmission flange attachment on the configurations below. It is supplied individually for front axle, flange shaft or related drivetrain service.

Technical details

• Original number: N-904-411-03 / N90441103.
• Published nominal size: M10 x 20.
• Internal multi-point drive in the pictured socket head.
• Specified application: original front flange shaft hardware in the axle-to-transmission attachment.
• The exact-number catalog recommends replacement whenever the bolt is removed.
• One bolt supplied. Axle, flange shaft, seals and other mounting hardware are separate.

Correct flange hardware retains the assigned component in its original drivetrain arrangement. This fastener is distinct from the larger outer axle bolt at the wheel hub and from other fasteners used around the axle assembly.

Match N90441103 at the actual attachment before ordering. Transmission design and axle arrangement can change the required hardware within the same vehicle family. The nominal thread size alone does not establish suitability for every flange or axle position.

Common reasons to replace

Renew the bolt when its connection is released during axle or flange service, following the catalog recommendation and applicable factory replacement requirements. Replace missing hardware, damaged threads, a rounded drive recess, deformation or corrosion affecting reliable installation.

Previous repairs can leave an incorrect substitute or a fastener damaged by an unsuitable drive tool. Inspect the complete flange attachment and obtain the correct original hardware before reassembly.

Inspect mating threads and flange components alongside the bolt. A new fastener cannot repair a damaged flange shaft, stripped mating threads, worn axle joint or leaking shaft seal. Correct the diagnosed fault before completing the attachment.

Drivetrain vibration, noise or fluid leakage requires inspection of the axle, joints, flange and associated components. Replacing this bolt alone does not restore a worn joint or correct a seal failure.

Installation and service notes

Follow the factory procedure for the exact axle and transmission. Identify the assigned flange shaft bolt before releasing the connection, and support affected components as directed so the axle and associated joints are not strained.

Inspect mating threads and attachment surfaces. Correct damaged components and establish the prescribed assembly position before installing new hardware. Start the bolt by hand without cross-threading.

Use the correctly sized drive tool fully engaged in the actual socket recess. Follow the factory tightening requirement and any specified assembly sequence for this exact flange attachment, together with the required thread preparation.

Do not transfer a tightening value from the outer wheel-hub bolt, another axle joint fastener or an unrelated M10 bolt. Follow the original repair information for the actual transmission and flange arrangement.

If the fastener binds or the component does not seat normally, inspect alignment, thread condition and hardware selection before continuing. Do not compensate for a damaged connection by increasing tightening force.

Complete the prescribed drivetrain operating and leakage checks after service. Confirm all affected axle and flange hardware is installed and nearby components have their required clearance. This listing supplies one original bolt; select other axle hardware and seals separately.

Fitment

Confirm original N90441103 at the actual front flange shaft attachment before ordering. One bolt supplied.