OVERVIEW
Factory twelve-point hardware for the specified mounting joint
N-911-291-01 is the Genuine VW/Audi M10x40 twelve-point collar bolt used at the assigned transmission or starter-related mounting positions below. Its external twelve-point head and collar must match the original joint specification.
Fasteners with a similar diameter can have different lengths, head forms and clamping requirements. Match the original factory number and assigned joint rather than choosing a bolt by appearance alone.
Technical details
- Complete factory number: N-911-291-01.
- Factory specification: M10 × 40 twelve-point collar bolt.
- Design: external twelve-point drive head with collar and threaded shank.
- Quantity supplied: one individual bolt.
The nominal thread and length describe the fastener itself. This listing supplies one bolt rather than the full quantity required for an assembly. Matching nuts, washers, brackets and related parts are separate.
Common reasons to replace
- The original bolt is missing after component service.
- Threads are damaged or will not engage correctly.
- The drive head is rounded or otherwise damaged.
- Corrosion or deformation makes the original fastener unsuitable for reuse.
Inspect the mating threads, supported component and associated hardware. A new bolt cannot correct a cracked mounting feature, damaged bracket or stripped receiving thread.
Vehicle fitment
Use only at the assigned factory fastening position on the listed applications. These vehicle entries do not establish compatibility with every fastening point on the vehicle.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi R8 | 2014 | 5.2L gasoline V10; PR TU7 | Coupe or Spyder; quattro | Assigned M10x40 hardware in the starter assembly; confirm original mounting position. |
| Audi S5 | 2013 | 3.0L supercharged gasoline V6 | Cabriolet; quattro; 7-speed S tronic; PR G1D | Assigned engine/transmission connecting M10x40 bolt only. |
| Audi S4 | 2014 | 3.0L supercharged gasoline V6 | B8 sedan; quattro; 7-speed S tronic; PR G1D | Original assigned transmission assembly M10x40 collar bolt only; excludes 6-speed manual arrangement. |
Installation guidance
Follow the exact engine, transmission or starter repair procedure for the assigned joint. Isolate the electrical system when the starter procedure requires it, support affected assemblies and use the correct twelve-point socket. Apply the specified torque and replace other hardware designated for single use.
Check seating and engagement before final tightening. Verify that the serviced assembly is properly secured and that all required functional checks are completed.
Ordering information
One individual genuine bolt. Related nuts, washers, brackets and other assembly components are separate. Confirm VIN and original hardware number.