| D | Ignition/starter switch |
| E132 | Traction control system switch |
| J104 | ABS with EDL control unit |
| J218 | Combi-processor in dash panel insert |
| K86 | Traction control system warning lamp |
| N55 | ABS hydraulic unit |
| S7 | Fuse in fuse box/relay plate |
| T10b | 10-pin connector, orange, left connector point, A pillar |
| T10ap | 10-pin connector, grey, right connector point, A pillar |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 81 | Earth connection -1-, in dash panel wiring harness |
| 135 | Earth connection -2-, in dash panel wiring harness |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A19 | Connection (58d), in dash panel wiring harness |
| A91 | Connection (signal for dash panel insert), in dash panel wiring harness |
| A104 | Positive (+) connection -2- (15), in dash panel wiring harness |
| * | Only models with ABS, EDL and ASR/TCS |
| ** | Applicable up to 1999 model year |
| *** | Applicable from model year 2000 |
| **** | Only applies to ABS with EDL |
| G44 | Rear right speed sensor |
| G45 | Front right speed sensor |
| G46 | Rear left speed sensor |
| G47 | Front left speed sensor |
| J104 | ABS with EDL control unit |
| N55 | ABS hydraulic unit |
| T10b | 10-pin connector, orange, left connector point, A pillar |
| T16 | 16-pin connector, diagnostic connector |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| * | Only models with ABS, EDL and ASR/TCS |
| ** | Only applies to ABS with EDL |
| *** | Only models with front-wheel drive |
| **** | Only models with quattro four-wheel drive |
| J104 | ABS with EDL control unit |
| J402 | Operating electronics control unit, navigation |
| N55 | ABS hydraulic unit |
| N99 | ABS inlet valve, front right |
| N100 | ABS outlet valve, front right |
| N101 | ABS inlet valve, front left |
| N102 | ABS outlet valve, front left |
| N133 | ABS inlet valve, rear right |
| N134 | ABS inlet valve, rear left |
| N135 | ABS outlet valve, rear right |
| N136 | ABS outlet valve, rear left |
| N166 | EDL change-over valve, front right |
| N167 | EDL outlet valve, front right |
| N168 | EDL change-over valve, front left |
| N169 | EDL outlet valve, front left |
| T10ap | 10-pin connector, grey, right connector point, A pillar |
| 44 | Earth point, lower part of left A pillar |
| 100 | Earth connection -1-, in ABS wiring harness |
| A127 | Connection (rear left speed sensor), in dash panel wiring harness |
| A128 | Connection (rear right speed sensor), in dash panel wiring harness |
| * | Only models with radio navigation system |
| ** | Only models with EDL/EDL and ASR/TCS |
| J104 | ABS with EDL control unit |
| J217 | Automatic gearbox control unit |
| J... | Engine control units |
| N55 | ABS hydraulic unit |
| T10b | 10-pin connector, orange, left connector point, A pillar |
| T10m | 10-pin connector, black, connector point, electronics box, plenum chamber |
| T10x | 10-pin connector, red, right connector point, A pillar |
| T10ap | 10-pin connector, grey, right connector point, A pillar |
| T15g | 15-pin connector, brown, right connector point, A pillar |
| T15m | 15-pin connector, red, connector point, electronics box, plenum chamber |
| A45 | Connection (engine speed signal), in dash panel wiring harness |
| A140 | Connection (ASR (TCS)), in dash panel wiring harness |
| * | See applicable engine version |
| ** | Only models with ABS, EDL and ASR/TCS |
| *** | Only models with automatic gearbox |
| **** | Only applies to models with 2.7 litre/2.8 litre engine (Motronic) and automatic gearbox |
| ***** | Only applies to models with 2.8 litre engine (Motronic) and manual gearbox |
| F | Brake light switch |
| J104 | ABS with EDL control unit |
| J105 | ABS return flow pump relay |
| J106 | Relay for ABS solenoid valves |
| N55 | ABS hydraulic unit |
| S13 | Fuse in fuse box/relay plate |
| T10b | 10-pin connector, orange, left connector point, A pillar |
| S53 | ABS hydraulic pump fuse |
| V39 | ABS return flow pump |
| 100 | Earth connection -1-, in ABS wiring harness |
| A18 | Connection (54), in dash panel wiring harness |
| A32 | Positive (+) connection (30), in dash panel wiring harness |
| G34 | Brake lining/pad wear sender, front left |
| G35 | Brake lining/pad wear sender, front right |
| G36 | Brake lining/pad wear sender, rear left |
| G37 | Brake lining/pad wear sender, rear right |
| T2 | 2-pin connector, red, rear right |
| T2a | 2-pin connector, red, rear left |
| T10ap | 10-pin connector, grey, right connector point, A pillar |
| 100 | Earth connection -1-, in ABS wiring harness |
| * | Does not apply to RS4 models |
| ** | Applies to RS4 models only |
