OVERVIEW
Factory hexagon bolt for the V8 coolant bracket
N-911-409-01 is the Genuine VW/Audi M10 x 75 hexagon bolt specified at the coolant pump bracket connection on the listed 4.2L V8 applications.
The cooling assembly contains several fastener sizes. This bolt secures the assigned bracket connection and should be selected by its complete part number, engine code and mounting position.
Technical details
- Complete factory number: N-911-409-01.
- Factory specification: M10 x 75 mm.
- Design: externally driven hexagon-head threaded bolt.
- Quantity supplied: one individual bolt.
M10 is the nominal thread diameter and 75 mm is the factory bolt length. The listed assemblies call for three bolts at this connection; this listing supplies one. Pump cover screws and sealing rings have their own specifications.
Common reasons to replace
- The bolt is missing after coolant pump or bracket service.
- Threads are damaged or cross-threaded.
- The hexagon head is rounded or the bearing face is damaged.
- Corrosion prevents the fastener from seating and tightening correctly.
- The installed bolt has the wrong length or engagement for the original connection.
Check the bracket, mating threads and mounting surfaces before fitting new hardware. Repair damaged threads or cracked components as required. A replacement bolt does not correct coolant leaks caused by failed seals or a worn pump.
Vehicle fitment
The engine restriction is essential. Match the exact coolant bracket connection below; similar models with other engines use different parts.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Volkswagen Phaeton | 2006 | 4.2L gasoline V8; PR T81 | Sedan; 4Motion; Automatic | Assigned coolant-system bracket connection, bracket 077121235N; not W12 hardware. |
| Volkswagen Touareg | 2004 | 4.2L gasoline V8; PR T88 | 7L SUV; 4Motion; 6-speed automatic | Assigned coolant pump bracket connection; not VR6 or diesel hardware. |
Installation guidance
Follow the vehicle-specific coolant pump and bracket procedure. Let the engine cool before opening the cooling system. Align the bracket, start the bolt by hand and use the specified tightening sequence and torque for the exact connection.
If cooling-system components were opened, renew the specified seals, refill with the approved coolant and perform the required bleeding and leak checks. Verify bracket seating before returning the vehicle to service.
Ordering information
One genuine bolt per order. Coolant pump, bracket, seals and additional bolts are separate. Confirm VIN, engine and required quantity.