• N-105-449-03 Genuine VW/Audi individual multipoint socket-head mounting bolt, internal multipoint drive, original product photo 1
  • N-105-449-03 Genuine VW/Audi individual multipoint socket-head mounting bolt, socket-head mounting hardware, repeated original archive photo 2
  • N-105-449-03 Genuine VW/Audi individual multipoint socket-head mounting bolt, threaded shank identification, repeated original archive photo 3
  • N-105-449-03 Genuine VW/Audi individual multipoint socket-head mounting bolt, individual factory fastener, repeated original archive photo 4
  • N-105-449-03 Genuine VW/Audi individual multipoint socket-head mounting bolt, head and bearing surface, repeated original archive photo 5
  • N-105-449-03 Genuine VW/Audi individual multipoint socket-head mounting bolt, part-number reference, repeated original archive photo 6
  • N-105-449-03 Genuine VW/Audi individual multipoint socket-head mounting bolt, assigned mounting connection, repeated original archive photo 7
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Genuine VW/Audi

N-105-449-03 Genuine VW/Audi Multipoint Socket Head Bolt

N-105-449-03 Genuine VW/Audi Multipoint Socket Head Bolt

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N-105-449-03

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OVERVIEW

Genuine VW/Audi N-105-449-03 is an individual socket-head bolt with an internal multipoint drive. Its factory nominal specification is M8 × 55. This standard hardware number is assigned to several different original mounting connections; the fitment table identifies the confirmed applications separately.

Technical details and contents

  • Factory part number: N-105-449-03 / N10544903.
  • Nominal threaded fastener specification: M8 × 55.
  • Socket head with internal multipoint drive.
  • Quantity supplied: one bolt.
  • Associated rails, brackets, clamps, seals and other hardware are separate.

The nominal size identifies the functional bolt specification and is not a packaged shipping dimension. Use the correct multipoint tool for the actual drive. A similar-looking bolt with a different length or factory number may not provide the intended thread engagement.

Distinct mounting applications

On the specified Volkswagen VR6 configurations, this bolt is assigned to the fuel-rail mounting assembly. On the listed Audi RS5 applications, it belongs to the alternator and mounting-bracket arrangement. On the first-generation R8 configuration below, it secures the assigned rear anti-roll-bar clamp attachment.

These are separate joints with separate service procedures. The same part number does not make their tightening values, required quantities or access procedures interchangeable. Select the exact attachment and vehicle configuration before ordering or installing the hardware.

Common reasons to replace

  • The bolt is missing during fuel-rail, accessory-bracket or suspension service.
  • The internal multipoint drive is damaged.
  • The threads are worn, cross-threaded or otherwise damaged.
  • The shank is bent or the head no longer seats correctly.
  • The factory repair procedure calls for replacement at the serviced joint.

Inspect the receiving threads and mating component before fitting new hardware. Replacing a bolt will not repair a cracked bracket, damaged rail mounting boss, deteriorated anti-roll-bar bush or stripped threaded hole.

Vehicle fitment

Use the application restrictions to distinguish the mounting point. A model can contain several M8 fasteners with different lengths and functions. Match the original component and engine or body configuration rather than selecting by model name alone.

Vehicle Model years Engine Configuration Application restrictions
Volkswagen Passat 2013–2014 3.6L gasoline VR6 NMS sedan; original fuel-rail mounting attachment; 6-speed DSG; front-wheel drive Fuel-rail socket-head bolt M8 × 55; seven assigned in the assembly. One bolt supplied; excludes four-cylinder gasoline and TDI engines.
Volkswagen Touareg 2014–2015 3.6L gasoline VR6 7P SUV; original 03H fuel-rail mounting assembly; 8-speed automatic; 4Motion Assigned fuel-rail bolt M8 × 55. Excludes 3.0L TDI and Hybrid. Fuel-pump production-date changes are separate from this bolt.
Audi RS5 2013–2014 4.2L naturally aspirated gasoline V8 Coupe; TN8 engine; original alternator bracket attachment; 7-speed S tronic DSG; quattro Assigned M8 × 55 alternator/bracket bolt. Adjacent M8 × 35 and M10 × 60 fasteners have different part numbers.
Audi RS5 2014–2015 4.2L naturally aspirated gasoline V8 Cabriolet; TN8 engine; original alternator bracket attachment; 7-speed S tronic DSG; quattro Original assigned M8 × 55 bolt only. Alternator, bracket, sleeves and other fasteners are separate.
Audi R8 2015 4.2L gasoline V8 or 5.2L gasoline V10 Type 42 Coupe K8C or Spyder K8W; rear anti-roll-bar clamp attachment; 6-speed manual or 7-speed S tronic; quattro Assigned M8 × 55 rear clamp bolts, four per complete assembly. One individual bolt supplied; excludes second-generation R8 from this row.

Installation guidance

Follow the factory repair instructions for the exact connection. Fuel-system work requires the prescribed pressure-relief and cleanliness procedures. Alternator service requires the specified electrical preparation and correct bracket alignment. Suspension work requires proper vehicle support and the tightening sequence for the clamp assembly.

Start the bolt by hand and make sure the mating component is correctly seated. Use the correct multipoint drive tool and the joint-specific torque, angle and renewal instructions. Do not use the bolt to force a misaligned component into position or transfer a tightening value between the different applications shown here.

Ordering information

This listing contains one genuine bolt. Assembly quantities in the table describe the original connection and do not change the quantity supplied. Confirm all additional bolts, nuts, sleeves, gaskets or seals required for the complete repair.