OVERVIEW
Genuine VW/Audi collared hex bolt, part number N-102-683-04. This original M8 fastener has multiple specified mounting uses. The fitment table separates confirmed accessory-belt tensioner and pendulum-mount applications so the hardware can be matched to the exact repair.
Technical details
- Original part number: N-102-683-04 / N10268304.
- Published nominal size: M8 x 45 mm.
- External hexagonal head with a collar beneath the head.
- Cataloged earlier number: N10268302.
- One bolt is supplied. Tensioner, belt, mount, bracket and other hardware are separate.
- Matching thread diameter alone does not establish compatibility; the length, head geometry and specified location must match.
Common reasons to replace
Replace a missing bolt or one with damaged threads, a rounded head, visible deformation or corrosion that has compromised its condition. Renew any fastener that the factory procedure requires replacing after removal.
For a belt-tensioner repair, inspect the tensioner, pulley, belt and mounting surfaces together. Belt noise or improper tracking can come from worn bearings, a defective tensioner or incorrect alignment. A new mounting bolt does not correct those conditions.
For a pendulum-mount repair, inspect the mount and its attachment points. Excessive drivetrain movement can result from deteriorated mount material or a damaged bracket. Replacing the bolt alone is not a remedy for a worn mount.
Keep the fasteners organized by mounting position during disassembly. Similar-looking M8 bolts can have different lengths and specifications. An incorrect replacement can create poor engagement or interfere with the receiving component.
Installation and service notes
Use the factory procedure for the exact engine, transmission and assembly. For belt work, release tension using the prescribed method and confirm belt routing. For mount work, support the drivetrain as directed before removing hardware.
Inspect mating threads and surfaces, align the component and start the bolt by hand. Follow the required tightening specification and sequence for that particular mounting point. Do not transfer a belt-tensioner torque value to a pendulum-mount attachment or infer a torque from the M8 diameter.
Use thread treatments and companion replacement hardware only when the applicable repair instructions call for them. Check the required number of bolts for the actual job; this listing supplies one bolt rather than a complete hardware kit.
After belt service, verify component seating, belt routing and tracking. After mount service, verify mounting alignment, secure attachment and drivetrain clearance. Continue diagnosis if noise or excess movement remains.
Fitment
| Vehicle | Model years | Engine | Chassis and transmission | Application restrictions |
|---|---|---|---|---|
| Volkswagen R32 | 2004 | 3.2L VR6 gasoline | Mk4, 4Motion; 6-speed manual | Pendulum-mount hardware; confirm original subframe attachment position and required bolt count. |
| Volkswagen R32 | 2004 | 3.2L VR6 gasoline | Mk4, 4Motion; 6-speed manual | Accessory-belt tensioner hardware; match the original mounting position. This row covers a separate use from the pendulum mount. |
| Audi A3 | 2006–2008 | 2.0L turbo FSI gasoline, BPY | 8P, front-wheel drive; 6-speed manual | Accessory serpentine-belt tensioner hardware; match original fastener position. FSI engine only for this profile. |
| Volkswagen GTI | 2002–2005 | 1.8L turbo gasoline, AWP | Mk4, front-wheel drive; 5-speed automatic | Accessory-belt tensioner hardware; engine code must be AWP. Match the original attachment position. |
Confirm the original bolt number, engine code and exact attachment position before ordering. One bolt is supplied.