OVERVIEW
Genuine Front Upper Ball Joint Retaining Hardware
The N-909-413-01 Genuine VW/Audi self-locking collar nut retains the front upper control-arm ball-joint stud at the wheel-bearing housing on the matched applications below. Its integrated collar provides the specified seating surface, and its self-locking construction is part of the original joint's fastening arrangement. This listing supplies one nut.
Technical Details
- OEM part number: N-909-413-01.
- Thread specification: M12 × 1.5.
- Head style: external hexagon with an integrated collar.
- Type: self-locking nut.
- Matched position: front upper control arm/ball-joint stud at the wheel-bearing housing, catalog position 15.
- Quantity supplied: one nut. The matched front assembly specifies two, one for each side.
The thread size and mounting position matter. Lower ball-joint, tie-rod and upper-arm inner mounting hardware can have different dimensions and part numbers. Match the original nut to the correct stud instead of ordering by vehicle name or appearance alone.
Common Reasons to Replace
- The self-locking nut is removed during upper control-arm or steering-knuckle service and the repair procedure calls for renewal.
- The hexagon is rounded or damaged and cannot be tightened with reliable tool engagement.
- Internal threads are damaged, cross-threaded or corroded.
- Existing hardware is missing or has been replaced with an unidentified nut that does not match the original fastening arrangement.
A replacement nut restores the correct attachment hardware when the surrounding components remain serviceable. It does not repair a worn ball joint, a damaged stud or a worn mounting seat. Inspect those components when diagnosing front suspension play, clunks or steering instability.
Vehicle Fitment
Fitment applies to the specified original front upper ball-joint attachment. The Q7 factory catalog changes this position to WHT-003-950 at November 1, 2010. For a 2011 vehicle, confirm the actual build date and original mounting hardware; the year alone is insufficient.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi Q7 | 2007–2010 | 3.6L V6 gasoline | 4L SUV; original front upper control-arm-to-wheel-bearing-housing joint; quattro; no transmission-specific restriction at this joint | Front upper ball-joint retaining nut, M12 × 1.5, catalog position 15. Factory production cutoff: before November 1, 2010. The 2011 rows apply only to vehicles built before that cutoff; later arrangement specifies WHT-003-950. Verify original stud, suspension and VIN. |
| Audi Q7 | 2007–2010 | 4.2L V8 gasoline | 4L SUV; original front upper control-arm-to-wheel-bearing-housing joint; quattro; no transmission-specific restriction at this joint | Front upper ball-joint retaining nut, M12 × 1.5, catalog position 15. Factory production cutoff: before November 1, 2010. The 2011 rows apply only to vehicles built before that cutoff; later arrangement specifies WHT-003-950. Verify original stud, suspension and VIN. |
| Audi Q7 | 2009–2010 | 3.0L V6 TDI diesel | 4L SUV; original front upper control-arm-to-wheel-bearing-housing joint; quattro; no transmission-specific restriction at this joint | Front upper ball-joint retaining nut, M12 × 1.5, catalog position 15. Factory production cutoff: before November 1, 2010. The 2011 rows apply only to vehicles built before that cutoff; later arrangement specifies WHT-003-950. Verify original stud, suspension and VIN. |
| Audi Q7 | 2011 | 3.0L supercharged V6 gasoline | 4L SUV; original front upper control-arm-to-wheel-bearing-housing joint; quattro; no transmission-specific restriction at this joint | Front upper ball-joint retaining nut, M12 × 1.5, catalog position 15. Factory production cutoff: before November 1, 2010. The 2011 rows apply only to vehicles built before that cutoff; later arrangement specifies WHT-003-950. Verify original stud, suspension and VIN. |
| Audi Q7 | 2011 | 3.0L V6 TDI diesel | 4L SUV; original front upper control-arm-to-wheel-bearing-housing joint; quattro; no transmission-specific restriction at this joint | Front upper ball-joint retaining nut, M12 × 1.5, catalog position 15. Factory production cutoff: before November 1, 2010. The 2011 rows apply only to vehicles built before that cutoff; later arrangement specifies WHT-003-950. Verify original stud, suspension and VIN. |
| Volkswagen Touareg | 2004–2005 | Gasoline or TDI with the original matched front suspension | 7L SUV; original front upper control-arm-to-wheel-bearing-housing joint; Original drivetrain; mounting-position fitment depends on the suspension joint | Factory front suspension catalog position 15. Verify M12 × 1.5 original upper ball-joint stud and exact nut part number; not a lower ball-joint or rear suspension nut. |
Installation and Ordering Notes
Use the factory repair procedure for the exact vehicle, suspension and ball-joint assembly. Follow its instructions for new locking hardware and the specified tightening sequence. A universal torque value, lubrication treatment or reuse allowance is not supplied here because those details must be taken from the applicable repair instructions.
Control arms, ball joints, wheel-bearing housings, bolts and other hardware are sold separately. Inspect the stud threads before fitting a new nut and confirm that the nut seats correctly. The seven-image gallery repeats the available original photograph with individual descriptive metadata. Those images show the same single nut.