OVERVIEW
Original clip nut for cooling air duct retention
N-904-190-03 is the Genuine VW/Audi clip nut assigned to the cooling air duct attachment on the confirmed Audi A8 applications below. Its folded clip form provides the receiving fastening point at the original duct mounting location.
The clip fits over the designated mounting edge and aligns with the mating fastener. Correct clip geometry matters: a generic nut can fail to locate on the edge or leave the duct attachment incorrectly supported.
Technical details
- Complete factory number: N-904-190-03.
- Factory specification: M4 × 15 × 17.5 factory clip-nut designation.
- Design: folded metal clip nut with central fastening opening.
- Quantity supplied: one individual clip nut.
The catalog dimensions identify the hardware specification, rather than a shipping package size. This listing supplies the individual clip nut; the air duct, radiator, fan assembly and mating screw are separate components.
Common reasons to replace
- The clip is missing after cooling-system or front-end service.
- The fastening opening no longer retains the correct screw.
- The folded clip has spread or fractured.
- Corrosion or physical damage prevents secure seating.
- A loose duct is traced to a damaged or missing attachment clip.
Check the duct mounting edge and mating fastener before installation. A cracked duct or enlarged mounting hole may require additional repairs; a replacement clip will not restore damaged plastic attachment features.
Vehicle fitment
Use at the original cooling air duct clip position on the listed 4.2L applications. Confirm the original clip specification and mounting arrangement; this is not a universal replacement for every clip on the vehicle.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi A8 | 1998 | 4.2L gasoline V8 | D2 sedan; quattro | Cooling air duct retaining clip; original assigned N90419003 position only. |
| Audi A8 | 1999 | 4.2L gasoline V8 | D2 sedan; quattro | Cooling air duct retaining clip; original assigned N90419003 position only. |
| Audi A8 | 2002 | 4.2L gasoline V8 | D2 sedan; quattro | Cooling air duct retaining clip; original assigned N90419003 position only. |
| Audi A8 | 2003 | 4.2L gasoline V8 | D2 sedan; quattro | Cooling air duct retaining clip; original assigned N90419003 position only. |
Installation guidance
Follow the relevant cooling air duct removal and installation procedure. Fit the clip squarely over the assigned edge, align the screw hole and use the correct mating screw. Avoid forcing a misaligned fastener or overtightening against the duct.
Confirm the duct is properly located and all original attachments are secure. Check clearance to the fan and surrounding cooling components before returning the vehicle to service.
Ordering information
One individual genuine clip nut. Air duct, mating screw and other cooling components are separate. Confirm VIN and original hardware number.