OVERVIEW
Genuine Front Upper Control Arm Mounting Hardware
The N-102-861-02 Genuine VW/Audi self-locking collar nut is used with the matched front upper control-arm fastening hardware on the applications listed below. This listing supplies one original part-number nut for a specific suspension mounting position.
Technical Details
- OEM part number: N-102-861-02.
- Thread specification: M10 × 1.5.
- Configuration: hexagon nut with an integral seating collar.
- Retention design: self-locking.
- Matched application: front upper control-arm mounting hardware in the referenced assembly.
- Related fasteners in that assembly include N-104-253-02 arm bolts and N-034-790-8 pinch bolts.
- Quantity supplied: one nut. Related bolts, control arms and other pieces are sold separately.
The collar provides the specified seating surface at the matched joint, while the self-locking design provides resistance to loosening when installed correctly. Correct retention still depends on the proper mating bolt, undamaged threads, correct seating and the vehicle-specific tightening procedure. A nut with a similar diameter is not automatically suitable for the same mounting position.
Common Reasons to Replace
- The nut has been removed during upper control-arm or associated suspension service and the repair procedure requires new locking hardware.
- Threads are stripped, cross-threaded or damaged by corrosion.
- The hexagon is rounded and no longer provides reliable tool engagement.
- The original nut is missing or has been replaced with incorrectly specified hardware.
- The collar or seating surface is visibly damaged and cannot seat properly.
Inspect the mating bolt, bushings and mounting surfaces at the same time. A new nut does not repair a worn ball joint, split bushing, damaged pinch-bolt bore or stripped bolt. Suspension noises, alignment changes and steering movement require diagnosis of the complete assembly.
Vehicle Fitment
The following entries apply to the matched front upper control-arm hardware. The suspension fastener position controls compatibility; engine size alone does not identify this nut. Confirm the original part number and chassis generation before ordering.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi A4 | 1997–2001 | Original engine; fitment at this upper control-arm mounting position is not engine-specific | B5/8D with the matched original front upper control-arm assembly; Original manual or automatic drivetrain; match suspension fastener position | M10 × 1.5 self-locking collar nut used with the matched upper control-arm hardware: N-104-253-02 arm bolts and N-034-790-8 pinch bolts in the referenced assembly. Verify original nut and suspension arrangement; not a blanket replacement for every M10 nut on the vehicle. |
| Audi A4 | 2002–2005 | Original engine; fitment at this upper control-arm mounting position is not engine-specific | B6/8E; through chassis 8E-5-400000 with the matched original front upper control-arm assembly; Original manual or automatic drivetrain; match suspension fastener position | M10 × 1.5 self-locking collar nut used with the matched upper control-arm hardware: N-104-253-02 arm bolts and N-034-790-8 pinch bolts in the referenced assembly. Verify original nut and suspension arrangement; not a blanket replacement for every M10 nut on the vehicle. |
| Audi A4 | 2005–2008 | Original engine; fitment at this upper control-arm mounting position is not engine-specific | B7/8E; from chassis 8E-5-400001 with the matched original front upper control-arm assembly; Original manual or automatic drivetrain; match suspension fastener position | M10 × 1.5 self-locking collar nut used with the matched upper control-arm hardware: N-104-253-02 arm bolts and N-034-790-8 pinch bolts in the referenced assembly. Verify original nut and suspension arrangement; not a blanket replacement for every M10 nut on the vehicle. |
| Volkswagen Passat | 1998–2005 | Original engine; fitment at this upper control-arm mounting position is not engine-specific | B5/B5.5 with the matched original front upper control-arm assembly; Original manual or automatic drivetrain; match suspension fastener position | M10 × 1.5 self-locking collar nut used with the matched upper control-arm hardware: N-104-253-02 arm bolts and N-034-790-8 pinch bolts in the referenced assembly. Verify original nut and suspension arrangement; not a blanket replacement for every M10 nut on the vehicle. |
Ordering and Installation Notes
This listing supplies the original N-102-861-02 revision. The later N-102-861-10 replacement appears in a wider catalog, and its entire application range is not assigned to this earlier nut. Other suspension, exhaust or drivetrain uses of an M10 collar nut need their own original-part check.
Follow the factory procedure for supporting the vehicle, removing the relevant suspension hardware, renewing locking fasteners and tightening the joint. Where the procedure requires tightening a bushing joint at the specified suspension position, follow that instruction. No universal torque or lubrication instruction is supplied because the exact joint and mating bolt determine the procedure.
A complete upper-arm service kit may contain multiple nuts; this product contains one. Count the hardware needed for the planned repair before ordering. The seven-image gallery repeats the available original archive photo with distinct descriptive metadata. The repeated photos do not indicate additional nuts or a complete control-arm kit.