A4 Mk1
| Secondary air system - exploded view of components |
| 1 - | Combination valve for secondary air (right-side) |
| q | Fitting location → Fig. |
| q | Checking → Chapter |
| q | Removing and installing → Chapter |
| 2 - | Gasket |
| q | Renew |
| 3 - | 10 Nm |
| 4 - | 22 Nm |
| 5 - | Y piece |
| 6 - | Secondary air inlet valve -N112- |
| q | Fitting location → Fig. |
| q | Checking → Chapter |
| 7 - | 6 Nm |
| 8 - | From vacuum reservoir |
| q | Fitting location: in front left wheel housing beneath liner |
| 9 - | Combination valve for secondary air (left-side) |
| q | Fitting location → Fig. |
| q | Checking → Chapter |
| q | Removing and installing → Chapter |
| 10 - | Gasket |
| q | Renew |
| 11 - | Connection |
| 12 - | Gasket |
| q | Renew |
| 13 - | Pressure hose |
| q | Check that it is securely seated |
| q | Press together at front to release |
| 14 - | O-ring |
| q | Renew |
| 15 - | Connecting pipe |
| q | To combination valves for secondary air inlet |
| q | Removal and installation involve taking out intake manifold → Chapter |
| 16 - | Connection |
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Note
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