OVERVIEW
Correct washer dimensions for the original joint
N-011-531-7 is a Genuine VW/Audi flat washer with a 13 mm bore, 24 mm outside diameter and 2.5 mm thickness. It is used at specified original fastening points across selected Volkswagen and Audi assemblies.
The washer provides the intended contact area beneath the specified fastener. Its bore, outside diameter and thickness determine clearance and stack height, so replacing it with a generic washer of a different thickness can change how the joint seats.
Technical details
- Complete factory number: N-011-531-7.
- Factory specification: 13 mm inside diameter x 24 mm outside diameter x 2.5 mm thickness.
- Design: Flat annular washer; not a spring washer, crush seal or adjustable gear shim.
- Quantity supplied: one individual washer; associated bolt, nut, bracket and component are not included.
These are functional component dimensions confirmed for this complete factory number. No unverified shipping weight or package dimensions are included.
Common reasons to replace
- A missing washer found during disassembly or inspection.
- A bent, distorted or deeply damaged washer that cannot seat evenly.
- An incorrectly sized substitute that changes the original contact area or fastening stack.
Check the fastener bearing surfaces, receiving component and any specified spacers. Replacing this washer alone does not repair a damaged bolt, worn joint, stripped thread or distorted bracket.
Vehicle fitment
The washer serves different functions across the applications below. Match both the vehicle and the particular fastening point; the table does not authorize use at every M12 joint.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Volkswagen Golf | 1987 | 1.8L gasoline | Mk2, FWD; Original manual gearbox | Gear-housing fastening hardware at the original 13 x 24 x 2.5 washer position; not an internal gear shim. |
| Volkswagen Quantum | 1987 | 2.2L five-cylinder gasoline | B2 sedan or wagon; Original configuration | Starter assembly fastening washer. Match the original M12 fastening point and complete part number. |
| Volkswagen Vanagon | 1987 | 2.1L water-cooled gasoline | T3 van; Original configuration | Rear body-panel mounting hardware only where N-011-531-7 is specified; no panel or bracket included. |
| Volkswagen EuroVan | 1993 | 2.5L inline-five gasoline | T4, FWD; 5-speed manual | Transmission assembly fastening washer at the original 13 x 24 x 2.5 location; check gearbox and repair configuration. |
| Audi 5000 | 1978 | 2.1L five-cylinder gasoline | Type 43 sedan, FWD; Original configuration | Front suspension assembly fastening washer, at catalog location requiring this exact number. |
| Audi 5000 | 1980 | 2.1L five-cylinder gasoline | Type 43 sedan, FWD; Original configuration | Front suspension and wheel-bearing-housing assembly fastening washer, at the specified original joint. |
| Audi 100 | 1989 | 2.3L five-cylinder gasoline | C3 sedan or wagon, original front suspension; Original configuration | Front wishbone attachment washer where the factory catalog specifies N-011-531-7; verify original joint and hardware. |
Installation guidance
Preserve the factory order of washers, spacers and fasteners. Install against clean, sound seating surfaces and follow the tightening procedure for the actual component being serviced.
Do not add extra washers to compensate for an incorrect bolt length or stack this washer as an improvised shim. Inspect the completed joint for correct seating and clearance.
Ordering information
New and unused inventory. One washer is supplied per ordered unit under full factory number N-011-531-7. Confirm the original part number and the quantity required for your specific repair.