OVERVIEW
Genuine VW/Audi front flange shaft bolt, part number N-104-135-01. This M8 x 28 socket-head bolt secures the specified front inner axle assembly to the transmission flange. Correct flange hardware helps keep the joint seated in its intended position during drivetrain operation.
Technical details
- Original part number: N-104-135-01 / N10413501.
- Published nominal bolt size: M8 x 28.
- Internal hex drive with a washer beneath the head, as shown in the original product photograph.
- Cataloged earlier number: N0447041.
- One bolt supplied; axle, CV joint, flange and remaining hardware are separate.
- The confirmed application below is restricted to manual transmissions.
The inner axle joint transfers drive through the transmission flange connection. This fastener belongs to that joint attachment; it is separate from the large outer axle bolt at the wheel hub. Verify the original number at the actual mounting position before choosing replacement hardware.
Common reasons to replace
Renew the bolt when servicing the attached axle or CV joint where the repair procedure calls for new hardware. Replacement is also appropriate for a missing fastener, damaged threads, a rounded hex recess, visible deformation or corrosion affecting secure assembly.
An axle joint that has been removed for boot replacement, transmission work or another repair provides an opportunity to inspect its hardware and mating flange. A driver that has slipped in the internal hex can leave damage that makes reliable tightening or future removal difficult.
Vibration, clicking and grease leakage require diagnosis of the axle, boot, joint and attachment. A replacement bolt cannot correct a worn CV joint or damaged flange. Identify the cause before reassembling the connection.
Installation and service notes
Match the original part number, bolt length, head arrangement and transmission configuration. The same vehicle family can use different joint hardware; nominal M8 diameter alone does not establish compatibility.
Follow the factory procedure for the exact axle and transmission. Clean and inspect mating contact surfaces and threaded holes as directed, and avoid trapping contamination between the joint and flange. Keep the required washer arrangement in place.
Seat the joint correctly and start the bolt by hand in undamaged mating threads. Use a correctly fitting hex driver fully engaged in the recess. Tighten the complete attachment in the prescribed sequence using the specified torque and any required additional angle.
Do not infer a tightening value from the M8 x 28 designation. Thread treatment, replacement requirements and tightening instructions depend on the actual assembly. Follow the applicable repair information rather than transferring specifications from a wheel-hub bolt or another transmission.
Inspect the remaining fasteners and flange for damage before completing service. This listing contains one bolt, not a complete axle hardware kit; order the quantity required by the actual repair.
Fitment
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Volkswagen Passat GLS | 2004–2005 | 1.8L turbocharged gasoline, AWM | B5.5 Sedan, front-wheel drive; Manual transmission only | Specified front inner axle-to-transmission flange bolt. Confirm original N10413501 and flange arrangement; automatic transmission applications excluded. |
| Volkswagen Passat GLS | 2004–2005 | 1.8L turbocharged gasoline, AWM | B5.5 Wagon, front-wheel drive; Manual transmission only | Specified front inner axle-to-transmission flange bolt. Confirm original N10413501 and flange arrangement; automatic transmission applications excluded. |
Confirm the original bolt number and exact axle-to-transmission flange connection before ordering. One bolt supplied.