Wiring Diagram AUDI A3 2004 - Selector lever lock solenoid - gear selector light bulb

| D | Ignition/starter switch |
| J217 | Automatic gearbox control unit |
| L19 | Gear selector light bulb |
| N110 | Selector lever lock solenoid |
| S7 | Fuse in fuse box/relay plate |
| S11 | Fuse in fuse box/relay plate |
| S13 | Fuse in fuse box/relay plate |
| S15 | Fuse in fuse box/relay plate |
| S231 | Fuse in fuse box |
| T10b | 10-pin connector, grey, in plenum chamber |
| 10 | Earth point, in plenum chamber |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| 249 | Earth connection -2-, in interior wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A23 | Connection (30al), in dash panel wiring harness |
| B149 | Positive (+) connection -2- (15a), in interior wiring harness |
Wiring Diagram AUDI A3 2004 - Multi-function switch
| E87 | Control and display unit for air conditioner/Climatronic |
| F | Brake light switch |
| F125 | Multi-function switch |
| J217 | Automatic gearbox control unit |
| J220 | Motronic control unit |
| J361 | Simos control unit |
| T10b | 10-pin connector, grey, in plenum chamber |
| T10x | 10-pin connector, orange, in plenum chamber |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| B185 | Connection -2- (54), in interior wiring harness |
| D84 | Connection (automatic gearbox), in engine compartment wiring harness |
| * | Only applies to models with engine codes APG, AUM |
| ** | Only applies to models with engine codes AVU, BFQ |
| *** | Models with air conditioner |
Wiring Diagram AUDI A3 2004 - Gearbox speed sender - gearbox oil temperature sender - vehicle speed sender
| G38 | Gearbox speed sender |
| G68 | Vehicle speed sender (inductive sender, 2 connections) |
| G93 | Gearbox oil temperature sender |
| J217 | Automatic gearbox control unit |
| N88 | Solenoid valve 1 |
| N89 | Solenoid valve 2 |
| N90 | Solenoid valve 3 |
| N91 | Solenoid valve 4 |
| N92 | Solenoid valve 5 |
| N93 | Solenoid valve 6 |
| N94 | Solenoid valve 7 |
| T3 | 3-pin connector, near vehicle speed sender |
Wiring Diagram AUDI A3 2004 - Starter inhibitor and reversing light relay
| B | Starter |
| D | Ignition/starter switch |
| J17 | Fuel pump relay |
| J217 | Automatic gearbox control unit |
| J226 | Starter inhibitor and reversing light relay |
| M16 | Reversing light bulb, left |
| M17 | Reversing light bulb, right |
| T6m | 6-pin connector, brown, engine compartment, in plenum chamber |
| T10b | 10-pin connector, grey, in plenum chamber |
| T10x | 10-pin connector, orange, engine compartment, in plenum chamber |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| A87 | Connection (RF (reversing light)), in dash panel wiring harness |
| A98 | Positive (+) connection -4- (30), in dash panel wiring harness |
| B156 | Positive (+) connection (30a), in interior wiring harness |
| B239 | Positive (+) connection -1- (50), in interior wiring harness |
| * | Only applies to models with engine code APG |
| ** | Only applies to models with engine codes AVU, BFQ |
| *** | Only applies to models with engine code AUM |
Wiring Diagram AUDI A3 2004 - Combi-processor in dash panel insert
| J217 | Automatic gearbox control unit |
| J218 | Combi-processor in dash panel insert |
| J220 | Motronic control unit |
| J361 | Simos control unit |
| T10 | 10-pin connector, white, engine compartment, in plenum chamber |
| T10b | 10-pin connector, grey, in plenum chamber |
| T16 | 16-pin connector, black, centre console compartment (diagnostic connector) |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| A50 | Positive (+) connection (30as), in dash panel wiring harness |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| B116 | Connection (58d), in interior wiring harness |
| * | Only applies to models with engine codes APG, AUM |
| ** | Only applies to models with engine codes AVU, BFQ |
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