OVERVIEW
Genuine flat washer for the assigned factory attachment
The N-011-527-21 Genuine VW/Audi washer provides the specified flat bearing surface at the verified factory connections below. Its nominal 10.5×21×2 size identifies the original hardware.
This washer is used in several different assemblies. The table identifies the verified attachment for each vehicle configuration. A vehicle match does not mean it replaces every washer on that vehicle, and this flat washer is not a sealing ring or lock washer.
Technical details
- Complete factory number: N-011-527-21.
- Factory specification: 10.5 × 21 × 2.
- Design: flat washer with circular clearance opening.
- Quantity supplied: one individual washer.
The nominal specification identifies the opening, outside diameter and thickness. Those dimensions affect clearance and bearing contact. Do not substitute a washer with a different thickness or diameter merely because it fits over the same bolt.
Common reasons to replace
- The original washer is missing after service.
- The washer is bent or distorted.
- The bearing surface is damaged.
- The washer has excessive corrosion or physical damage.
- A previous repair used a washer with the wrong dimensions.
Inspect the bolt, retained component and mating surface before fitting replacement hardware. A new washer cannot repair a distorted bracket, damaged mounting face or incorrect bolt. Restore the original hardware arrangement for the selected connection.
Vehicle fitment
Each row names a different original assembly assigned N01152721. Observe the quattro, long-wheelbase and engine restrictions. The R8 exhaust uses other washers as well, including a different thicker item.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Audi A4 | 2008 | 2.0L turbocharged gasoline inline-four | B7 sedan or Avant; quattro; PR 1X1; Original rear-axle support assembly | Original rear-axle assembly washer position assigned N01152721, 10.5×21×2; quattro 1X1 only. |
| Audi A4 | 2008 | 3.2L FSI gasoline V6 | B7 sedan or Avant; quattro; PR 1X1; Original rear-axle support assembly | Original rear-axle assembly washer position assigned N01152721, 10.5×21×2; quattro 1X1 only. |
| Audi A8 L | 2006 | 4.2L gasoline V8 | D3 long-wheelbase sedan; quattro; PR K8L; Original underbody trim/heat-shield attachment | Original washer position assigned N01152721; long-wheelbase K8L only for this application. |
| Audi A8 L | 2006 | 6.0L gasoline W12 | D3 long-wheelbase sedan; quattro; PR K8L; Original underbody trim/heat-shield attachment | Original washer position assigned N01152721; long-wheelbase K8L only for this application. |
| Audi A6 | 2004 | 3.0L gasoline V6; PR T15 | C5 sedan with front-wheel drive or quattro; Avant with quattro; Original alternator bracket attachment | Original T15 alternator bracket washer position assigned N01152721, 10.5×21×2; not every washer in the accessory drive. |
| Audi R8 | 2015 | 4.2L FSI gasoline V8 | Type 42 coupe or Spyder; quattro; Original exhaust mounting arrangement | Original exhaust hardware position assigned N01152721 10.5×21×2. Distinct from thicker 10.5×25×4 N0154027 washer. |
| Audi R8 | 2015 | 5.2L FSI gasoline V10 | Type 42 coupe or Spyder; quattro; Original exhaust mounting arrangement | Original exhaust hardware position assigned N01152721 10.5×21×2. Distinct from thicker 10.5×25×4 N0154027 washer. |
Installation guidance
Follow the factory procedure for the selected attachment. Fit the washer at its original position and orientation, with the specified bolt and associated hardware. Use the tightening specification for that exact connection.
Verify component seating and secure mounting. Complete the functional, clearance or leak checks required by the serviced assembly. Do not transfer bolt torque values between the different applications listed here.
Ordering information
Supplied as one genuine washer. Bolts, nuts, brackets, panels and a complete hardware set are not included. Confirm the original number and quantity required for the selected attachment.