OVERVIEW
Original self-locking socket-head fastening hardware
N-014-720-3 is a Genuine VW/Audi M10 x 22 self-locking bolt with an internal hex drive. Confirmed uses include the specified Mk4 Jetta engine-cover fastening point and the TT secondary-air pump bracket attachment listed below.
These are separate applications of the same complete factory number. The bolt supplies the original fastening geometry for its assigned joint; it is sold individually, without a bracket, pump, cover, bushings or additional mounting hardware.
Technical details
- Complete factory number: N-014-720-3.
- Factory specification: M10 x 22 mm, hexagon socket head, self-locking factory designation.
- Design: Cylindrical socket head with internal six-sided drive and factory self-locking specification.
- Quantity supplied: one individual bolt.
Match the original full number and fastening position. The nominal M10 x 22 size does not make it interchangeable with every engine bolt of the same dimensions.
Common reasons to replace
- A rounded hex drive that prevents reliable tightening or service removal.
- Damaged threads, a bent bolt or a compromised bearing surface.
- Missing original hardware, an incorrect substitute or a factory procedure requiring fresh self-locking hardware after removal.
For pump-bracket service, inspect the support, rubber isolators and receiving threads. Vibration or rattling can persist if a mounting bush or bracket is damaged. For a cover attachment, inspect its bushes and spacers before reassembly.
Vehicle fitment
Match the engine and exact fastening role. The Jetta cover attachment and TT pump-bracket entries do not describe the same location.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Volkswagen Jetta | 1999–2001 | 2.0L naturally aspirated gasoline, AEG/AZG/AVH as equipped | Mk4 sedan, FWD; Original configuration | Specified cylinder-block/oil-pan cover fastening position 39 requiring N-014-720-3. 1999 Mk4 from VIN 9M-X-000001 only; not an oil-pan perimeter bolt or drain plug. |
| Audi TT | 2002–2006 | 1.8L turbocharged gasoline, 225 hp | 8N Coupe or Roadster, quattro; 6-speed manual | Original secondary-air injection pump bracket attachment requiring M10 x 22 N-014-720-3. Sold as one bolt; confirm the full bracket fastening quantity. |
Installation guidance
Use the factory removal and tightening procedure for the assigned joint. Support the attached component, start the bolt by hand and retain the specified washers, bushes and spacers.
Follow the factory instructions for self-locking hardware and thread preparation; do not add lubricant or locking compound unless the procedure calls for it. Confirm component security and clearance after service.
Ordering information
New and unused inventory. Sold individually as N-014-720-3. Verify complete part number, engine code, attachment location and quantity before ordering.