OVERVIEW
Long factory bolt for the specified starter connection
N-103-344-03 is the Genuine VW/Audi M10 x 135 hex collared bolt used at the assigned starter and transmission connection on the confirmed V10 applications below.
The long shank and original bearing geometry suit a specific mounting stack. Starter assemblies can use more than one bolt length, so confirm this complete part number and exact location before ordering.
Technical details
- Complete factory number: N-103-344-03.
- Factory specification: M10 x 135 mm.
- Design: external hexagon head, collared bearing face and long shank with threaded end.
- Quantity supplied: one individual bolt.
M10 is the nominal thread diameter and 135 mm is the catalog length. This listing supplies the individual mounting bolt; it does not include the starter, solenoid, nuts or other bellhousing hardware.
Common reasons to replace
- The original bolt is missing following starter or gearbox work.
- Threads are stripped or cross-threaded.
- The hexagon head is rounded or damaged.
- The shank is bent or the collar no longer seats correctly.
- Corrosion or incorrect hardware prevents correct tightening.
Inspect the starter mounting flange, mating threads and contact surfaces before installation. Incorrect seating can affect starter alignment. Diagnose starting faults separately rather than assuming that new mounting hardware will repair a failing starter.
Vehicle fitment
Match the exact engine and connection below. Other engine versions and adjacent starter bolts use different hardware.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi S8 | 2008 | 5.2L gasoline V10; PR T8E | D3 sedan; quattro; 6-speed automatic | Assigned starter mounting bolt N10334403; M10 x 135 mm. Other starter mounting bolts differ. |
| Audi S6 | 2008–2009 | 5.2L gasoline V10 | C6 sedan; quattro; 6-speed automatic; PR G0R | Assigned M10 x 135 bolt at the transmission/starter connection only. |
Installation guidance
Follow the factory starter service procedure and isolate electrical power as required before working at the starter. Support and align the assembly, start the bolt by hand and use the specified tightening sequence and torque.
Check that the starter sits squarely and that wiring terminals and nearby hoses are correctly routed. Verify normal starting operation after the repair.
Ordering information
Sold individually as one genuine bolt. Confirm VIN, engine, exact mounting position and required quantity.