OVERVIEW
Genuine 20 mm cap for the assigned cylinder-head opening
N-011-901-7 is the Genuine VW/Audi end cap specified at the original 20 mm cylinder-head position on the configurations below. It closes its assigned opening as part of the original engine assembly.
An engine can contain several end caps with different diameters and installation requirements. Match this complete factory number and the actual opening rather than selecting a replacement solely by a general description such as core plug or freeze plug.
Technical details
- Complete factory number: N-011-901-7.
- Factory specification: 20 mm nominal factory diameter.
- Design: formed engine end cap.
- Quantity supplied: one individual end cap.
The 20 mm designation is the nominal component size. This is separate from the 36.6 mm and other caps found elsewhere in the engine. Correct bore preparation and seating are necessary to restore the original closure.
Common reasons to replace
- Leakage has been traced to the assigned capped opening.
- The original cap is damaged or distorted.
- Corrosion has compromised the cap.
- The cap has been removed during cylinder-head service.
- An incorrect plug was fitted during a previous repair.
Inspect the receiving bore, seating area and surrounding casting. Damage to the bore or casting requires separate repair; a new cap cannot compensate for a cracked or oversized opening.
Vehicle fitment
Match the exact engine, body configuration and original 20 mm cylinder-head opening in the table. The 2005 A4 application requires the stated B7 VIN branch.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi A4 | 2005, 2007 | 3.2L FSI gasoline V6; PR D2G | B7 sedan or Avant; quattro; Original cylinder-head 20 mm end-cap location | Only original N0119017 20 mm position; 2005 B7 VIN from 8E-5-400001. |
| Audi A4 | 2008 | 3.2L FSI gasoline V6; PR D2G | Cabriolet; quattro; Original cylinder-head 20 mm end-cap location | 3.2 FSI Cabriolet only; original N0119017 20 mm position. |
| Audi S5 | 2009 | 4.2L FSI gasoline V8; PR D0A | Coupe; quattro | Original 20 mm cylinder-head cap position only; not the V6 Cabriolet. |
| Audi A8 | 2007 | 4.2L FSI gasoline V8; PR MN5 | D3 sedan; standard or long wheelbase; quattro | Original 20 mm cylinder-head cap position only; not earlier multipoint-injection V8 or W12 positions. |
| Audi A6 | 2007–2008 | 3.2L FSI gasoline V6; PR D2G | C6 sedan; front-wheel drive or quattro; Avant with quattro | Original 20 mm cylinder-head end-cap position only; confirm original engine and cap number. |
| Volkswagen New Beetle | 2009 | 2.5L gasoline five-cylinder; PR TQ7 | Convertible; front-wheel drive | Original 20 mm cylinder-head end-cap position only; 14 mm and 36.6 mm caps are separate. |
Installation guidance
Follow the engine-specific factory procedure for cap removal, bore preparation and installation. Use the required installation tool, seating depth and sealant only where specified. Avoid damaging the surrounding casting or driving the cap beyond its specified position.
Complete the leak checks and any fluid-level restoration required for the serviced passage. Verify the cap is seated correctly before returning the engine to service.
Ordering information
One genuine end cap is supplied. Sealants, installation tools, cylinder-head parts and other caps are not included. Confirm the original number, bore and quantity required.