OVERVIEW
Factory fastener for the specified oil-outlet tube mounting point
N-106-109-02 is a Genuine VW/Audi M8 x 12 mounting bolt. In the confirmed B9 A4 applications below, it secures the specified turbocharger oil-outlet tube attachment.
The tube carries returning oil away from the turbocharger, while the mounting hardware holds its assigned attachment in place. The bolt and the pipe's sealing components serve different functions; a replacement bolt does not include or replace the oil-line seals.
Technical details
- Complete factory number: N-106-109-02.
- Factory specification: M8 x 12 mm factory mounting bolt.
- Design: Compact recessed-drive head and short threaded shank.
- Quantity supplied: one individual bolt.
Match the complete factory number and original attachment. Other bolts shown around the turbocharger secure different components and can have different lengths, head profiles or tightening requirements.
Common reasons to replace
- A damaged drive recess that prevents controlled tightening or removal.
- Damaged threads or a compromised head seating surface.
- Missing hardware or an incorrect substitute found during turbocharger or oil-line service.
Oil leakage can result from a failed seal, damaged tube, distorted attachment or another nearby component. Diagnose the leak and inspect the receiving thread before assuming that a new bolt will resolve it.
Vehicle fitment
These entries describe the specified turbo oil-outlet tube mounting use. Match the original line and complete bolt number for the vehicle.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi A4 | 2017 | 2.0L turbocharged gasoline | B9 sedan, quattro; 6-speed manual or 7-speed S tronic | Original turbocharger oil-outlet tube mounting position specifying N-106-109-02. Confirm complete number and exact attachment; separate pipe seals are not included. |
| Audi A4 | 2017 | 2.0L turbocharged gasoline | B9 sedan, FWD; 7-speed S tronic | Specified original turbocharger oil-outlet tube mounting point requiring N-106-109-02. Confirm exact hardware number and original oil-line arrangement. |
Installation guidance
Allow the engine and turbocharger to cool before service. Follow the factory access, oil-line handling, seal-replacement and tightening procedures for the exact engine.
Start the bolt by hand, avoid twisting the pipe and replace the applicable seals when instructed. Complete the prescribed oil-level and leak checks after assembly.
Ordering information
New and unused inventory. Sold individually as N-106-109-02. Confirm VIN, engine, attachment location and quantity before ordering.