OVERVIEW
Factory hollow bolt for the specified turbocharger oil connection
N-021-075-6 is the Genuine VW/Audi banjo bolt used at the assigned turbocharger oil pipe connection on the 4.0T applications below. Its hollow passage and cross-drilling allow fluid to pass through the fitting while the bolt retains the connection.
A banjo bolt performs a fluid-routing function as well as a fastening function. Passage arrangement, working length and sealing surfaces must suit the original fitting, making an ordinary solid bolt or a different banjo bolt unsuitable without exact factory confirmation.
Technical details
- Complete factory number: N-021-075-6.
- Factory specification: Factory banjo-bolt part N-021-075-6.
- Design: hollow hexagon-head fastener with cross-drilled fluid passage.
- Quantity supplied: one individual banjo bolt.
Match the complete factory number and exact oil-line connection. The required sealing rings and tightening specification belong to that connection and must be checked separately in the repair procedure.
Common reasons to replace
- The hollow bolt or its fluid passage is damaged.
- The threads are stripped or cross-threaded.
- The hexagon head or sealing-bearing surface is damaged.
- Contamination or corrosion prevents proper inspection and cleaning.
- The applicable factory repair procedure requires replacement.
Inspect the banjo fitting, oil pipe, sealing faces and receiving threads. Determine the source of leakage or an oil-supply concern before replacing hardware; a new bolt alone does not correct a damaged line or an underlying lubrication fault.
Vehicle fitment
The table retains the confirmed 4.0T TV7 engine branch and original oil-pipe application. Other engines in the same vehicle family may use different hardware.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi S6 | 2014 | 4.0L twin-turbocharged gasoline V8; TV7 | C7 sedan; quattro; Assigned turbocharger oil pipe banjo connection | TV7 engine branch; original N0210756 oil-pipe connection only. |
| Audi S7 | 2013 | 4.0L twin-turbocharged gasoline V8; TV7 | C7 Sportback; quattro; Assigned turbocharger oil pipe banjo connection | TV7 engine branch; original N0210756 oil-pipe connection only. |
| Audi A8 | 2015 | 4.0L twin-turbocharged gasoline V8; TV7 | D4 sedan; standard or long wheelbase; quattro; Assigned turbocharger oil pipe banjo connection | 4.0T TV7 only; excludes 3.0T, TDI and W12 branches. |
| Audi S8 | 2015 | 4.0L twin-turbocharged gasoline V8; TV7 | D4 sedan; quattro; Assigned turbocharger oil pipe banjo connection | Original N0210756 oil-pipe connection only; confirm engine and assembly position. |
Installation guidance
Follow the factory turbocharger oil-line procedure. Keep the fluid passage clean, install the specified new sealing rings and tighten the connection to the exact factory requirement. Avoid introducing debris or excess sealing compound into the oil circuit.
Complete the prescribed lubrication and engine-start checks, then inspect the connection for leakage. Confirm proper oil-system operation before returning the vehicle to service.
Ordering information
One genuine banjo bolt supplied. Sealing rings, oil pipe, turbocharger and oil are separate. Confirm the original number, exact connection and required quantity.