OVERVIEW
Genuine VW/Audi upper headlight mounting bolt, part number N-910-636-01. This original fastener secures the assigned top attachment of the headlight housing. It is supplied individually for replacement of missing or damaged lamp mounting hardware.
Technical details
- Original number: N-910-636-01 / N91063601.
- Published nominal size: M5 x 16.
- Internal six-lobe drive with the pictured rounded head and broad bearing washer arrangement.
- Original application: upper headlight housing attachment.
- One required at this position per headlight; one bolt supplied.
- Headlight housing, brackets and other mounting fasteners are separate.
The bolt clamps the designated lamp attachment against its intended mounting surface. Correct thread engagement and head contact help the housing remain seated in its original position. A similar-looking body screw can have a different thread form, length or bearing surface.
This mounting bolt is separate from bulb retainers, headlight adjustment components and the other bolts around the housing. Match the original number at the upper attachment rather than choosing hardware from the headlight assembly's overall appearance.
Common reasons to replace
Replace a bolt with damaged threads, a rounded drive recess, a distorted head, missing hardware or corrosion affecting sound installation. Incorrect mounting hardware left from a previous repair should be corrected after the original attachment is identified.
Headlight removal or bracket service can expose the upper bolt for inspection. Renew damaged hardware and replace the bolt whenever the applicable factory procedure requires replacement after removal.
A loose or misaligned headlight requires inspection of its complete mounting arrangement. A new bolt cannot repair broken housing tabs, a cracked bracket, damaged receiving threads or an electrical lighting fault. Correct the diagnosed defect before installing replacement hardware.
Installation and service notes
Follow the factory procedure for the vehicle's headlight housing and mounting configuration. Support the housing as required before removing its attachment hardware, and protect the electrical connectors and wiring during access.
Inspect the upper mounting tab, bracket, receiver and contact surfaces before installation. Confirm that the housing is aligned and that the original fastener number matches this position. Do not use a bolt to pull a broken or misaligned mounting tab into place.
Start the bolt by hand into sound threads. Use the correct six-lobe driver fully seated in the recess, and apply the tightening requirement specified for this exact lamp attachment. Do not transfer a torque from another body fastener with a similar nominal diameter.
Follow the factory thread preparation and renewal instructions. Preserve the specified bearing arrangement and do not add washers or thread treatments unless required by the applicable procedure.
Inspect the remaining lamp mounting hardware and replace other damaged components as needed. This listing supplies one upper bolt rather than a full set of headlight fasteners.
After assembly, complete the required housing seating, lighting and headlight aim checks. Mounting hardware holds the assembly in place but does not substitute for the prescribed adjustment procedure. Diagnose any remaining movement before returning the vehicle to service.
Fitment
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Volkswagen GTI | 2006–2008 | 2.0L turbocharged FSI gasoline, BPY | Mk5 hatchback, front-wheel drive; 6-speed manual | Assigned original upper headlight housing attachment requiring N91063601. One required at this position per headlight; one bolt supplied. Other lamp hardware separate. |
| Volkswagen GTI | 2006–2008 | 2.0L turbocharged FSI gasoline, BPY | Mk5 hatchback, front-wheel drive; 6-speed DSG | Assigned original upper headlight housing attachment requiring N91063601. One required at this position per headlight; one bolt supplied. Other lamp hardware separate. |
Confirm N91063601 at the upper headlight attachment. One bolt supplied.