| A | Battery |
| B | Starter |
| C | Alternator |
| C1 | Voltage regulator |
| D | Ignition/starter switch |
| F18 | Radiator fan thermo-switch |
| J207 | Starter inhibitor relay |
| J743 | Direct shift gearbox mechatronics |
| S131 | Fuse 1 |
| S132 | Fuse 2 |
| S133 | Fuse 3 |
| S134 | Fuse 4 |
| S138 | Fuse 5 |
| S164 | Fuse -3- (30), in fuse box/battery |
| T3e | 3-pin connector, black, on main fuse box/battery |
| T4b | 4-pin connector, in engine compartment, left |
| T6m | 6-pin connector, brown, in plenum chamber |
| T10b | 10-pin connector, grey, in plenum chamber |
| T20a | 20-pin connector, on direct shift gearbox mechatronics |
| 1 | Earth strap, battery - body |
| 2 | Earth strap, gearbox - body |
| * | Model year 2003 |
| ** | From model year 2004 onwards |
| # | Models with direct shift gearbox 02E |
| D | Ignition/starter switch |
| F2 | Door contact switch, driver's side |
| G79 | Accelerator pedal position sender |
| G185 | Accelerator pedal position sender -2- |
| J17 | Fuel pump relay |
| J220 | Motronic control unit |
| J743 | Direct shift gearbox mechatronics |
| S5 | Fuse in fuse box |
| S231 | Fuse 31 in fuse box |
| T6m | 6-pin connector, brown, in plenum chamber |
| T10b | 10-pin connector, grey, in plenum chamber |
| T10g | 10-pin connector, blue, in plenum chamber |
| T20a | 20-pin connector, on direct shift gearbox mechatronics |
| 277 | Earth connection -3-, in interior wiring harness, behind dash panel |
| A2 | Positive (+) connection (15), in dash panel wiring harness |
| A38 | Positive (+) connection -2- (15a), in dash panel wiring harness |
| B154 | Connection -1- (TK (door contact)), in interior wiring harness |
| * | Up to model year 2003 |
| C10 | Suppression filter |
| C22 | Interference suppression choke for airbag |
| E3 | Hazard warning light switch |
| E45 | Cruise control system switch |
| F | Brake light switch |
| F47 | Cruise control system brake pedal switch |
| J220 | Motronic control unit |
| J234 | Airbag control unit |
| J429 | Central locking control unit |
| M9 | Brake light bulb, left |
| M25 | High level brake light bulb |
| S13 | Fuse in fuse box |
| S15 | Fuse in fuse box |
| T10a | 10-pin connector, white, in plenum chamber |
| T10e | 10-pin connector, black, in plenum chamber |
| T10ae | 10-pin connector, on cruise control system switch |
| A125 | Connection (crash signal), in dash panel wiring harness |
| B131 | Connection (54), in interior wiring harness |
| B135 | Connection (15a), in interior wiring harness |
| B185 | Connection -2- (54), in interior wiring harness |
| * | Models with cruise control system |
| G39 | Lambda probe |
| G70 | Air mass meter |
| G130 | Lambda probe downstream of catalytic converter |
| J220 | Motronic control unit |
| T4g | 4-pin connector, in engine compartment, right, for lambda probe downstream of catalytic converter |
| T6m | 6-pin connector, brown, in plenum chamber |
| T6q | 6-pin connector, in engine compartment, right, for lambda probe |
| T10a | 10-pin connector, white, in plenum chamber |
| Z19 | Lambda probe heater |
| Z29 | Lambda probe heater, downstream of catalytic converter |
| D102 | Connection -2-, in engine compartment wiring harness |
| G108 | Lambda probe 2 |
| G131 | Lambda probe 2 downstream of catalytic converter |
| J220 | Motronic control unit |
| T4p | 4-pin connector, in engine compartment, right, for lambda probe 2 downstream of catalytic converter |
| T6s | 6-pin connector, in engine compartment, right, for lambda probe 2 |
| T10g | 10-pin connector, blue, in plenum chamber |
| Z28 | Lambda probe 2 heater |
| Z30 | Lambda probe 2 heater, downstream of catalytic converter |
| D102 | Connection -2-, in engine compartment wiring harness |
| J220 | Motronic control unit |
| J271 | Motronic current supply relay |
| N30 | Injector, cylinder 1 |
| N31 | Injector, cylinder 2 |
| N32 | Injector, cylinder 3 |
| N33 | Injector, cylinder 4 |
| N83 | Injector, cylinder 5 |
| N84 | Injector, cylinder 6 |
| T2m | 2-pin connector, wiring duct, in engine compartment, left |
| T6m | 6-pin connector, brown, in plenum chamber |
| T14i | 14-pin connector, in engine compartment, left |
| A139 | Connection -3- (15), in dash panel wiring harness |
| D101 | Connection -1-, in engine compartment wiring harness |
| D140 | Connection (injectors), in engine wiring harness |
| J220 | Motronic control unit |
| J492 | Four-wheel drive control unit |
| J569 | Brake servo relay |
| S237 | Fuse 37 in fuse box |
| S279 | Hydraulic pump relay fuse |
| T6m | 6-pin connector, brown, in plenum chamber |
| T8d | 8-pin connector, for four-wheel drive control unit |
| T10a | 10-pin connector, white, in plenum chamber |
| V192 | Vacuum pump for brakes |
| 132 | Earth connection -3-, in engine compartment wiring harness |
| 238 | Earth connection -1-, in interior wiring harness, near luggage compartment light |
| 249 | Earth connection -2-, in interior wiring harness |
| A98 | Positive (+) connection -4- (30), in dash panel wiring harness |
| B156 | Positive (+) connection -4- (30), in interior wiring harness |
| D78 | Positive (+) connection -1- (30a), in engine compartment wiring harness |
| • | CAN bus (data wire) |
| J220 | Motronic control unit |
| N70 | Ignition coil 1 with output stage |
| N127 | Ignition coil 2 with output stage |
| N156 | Intake manifold change-over valve |
| N291 | Ignition coil 3 with output stage |
| N292 | Ignition coil 4 with output stage |
| T10x | 10-pin connector, orange, in plenum chamber |
| 18 | Earth point, on cylinder block |
| 281 | Earth connection -1-, in engine wiring harness |
| 283 | Earth connection -2-, in engine wiring harness |
| A27 | Connection (speed signal), in dash panel wiring harness, near micro-central electrics |
| D173 | Connection (87), in engine wiring harness |
| E87 | Control and display unit for air conditioner |
| J220 | Motronic control unit |
| N205 | Inlet camshaft timing adjustment valve -1- |
| N318 | Exhaust camshaft timing adjustment valve -1- |
| N323 | Ignition coil -5- with final output stage |
| N324 | Ignition coil -6- with final output stage |
| P | Spark plug connector |
| Q | Spark plugs |
| T10x | 10-pin connector, orange, in plenum chamber |
| T14i | 14-pin connector, in engine compartment, left |
| T17 | 17-pin connector, behind dash panel, right, to air conditioner wiring harness |
| 131 | Earth connection -2-, in engine compartment wiring harness |
| 281 | Earth connection -1-, in engine wiring harness |
| 283 | Earth connection -2-, in engine wiring harness |
| D173 | Connection (87), in engine wiring harness |
| G28 | Engine speed sender |
| G40 | Hall sender |
| G61 | Knock sensor 1 |
| G163 | Hall sender 2 |
| J104 | ABS with EDL control unit |
| J220 | Motronic control unit |
| J743 | Direct shift gearbox mechatronics |
| T3d | 3-pin connector, grey, in engine compartment |
| T3k | 3-pin connector, black, in engine compartment |
| T10a | 10-pin connector, white, in plenum chamber |
| T20a | 20-pin connector, on direct shift gearbox mechatronics |
| 220 | Earth connection (sender earth), in engine wiring harness |
| A121 | Connection (high bus), in dash panel wiring harness |
| A122 | Connection (low bus), in dash panel wiring harness |
| D103 | Connection -3-, in engine compartment wiring harness |
| D141 | Connection (5V), in engine wiring harness |
| G2 | Coolant temperature sender |
| G62 | Coolant temperature sender |
| G66 | Knock sensor 2 |
| G186 | Throttle valve drive (electric power control) |
| G187 | Throttle valve drive angle sender -1- (electric power control) |
| G188 | Throttle valve drive angle sender -2- (electric power control) |
| G266 | Oil level thermo sender, service interval |
| J220 | Motronic control unit |
| J338 | Throttle valve module |
| S11 | Fuse in fuse box |
| T2an | 2-pin connector, black, in engine compartment |
| T14i | 14-pin connector, in engine compartment, left |
| 132 | Earth connection -3-, in engine compartment wiring harness |
| 220 | Earth connection (sender earth), in engine wiring harness |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| 283 | Earth connection -2-, in engine wiring harness |
| 608 | Earth point, in centre of plenum chamber |
| B157 | Positive (+) connection -3- (15a), in interior wiring harness |
| D103 | Connection -3-, in engine compartment wiring harness |
| J220 | Motronic control unit |
| J299 | Secondary air pump relay |
| N79 | Heater element (crankcase breather) |
| N80 | Activated charcoal filter system solenoid valve 1 (pulsed) |
| N112 | Secondary air inlet valve |
| T6m | 6-pin connector, brown, in plenum chamber |
| T10x | 10-pin connector, orange, in plenum chamber |
| V101 | Secondary air pump motor |
| 12 | Earth point, in engine compartment, left |
| 283 | Earth connection -2-, in engine wiring harness |
| D80 | Positive (+) connection (87a - for activated charcoal filter system solenoid valve), in engine compartment wiring harness |
| L39 | Connection (air conditioner pressure switch) -1-, in Climatronic wiring harness |
| G65 | High pressure sender |
| G250 | Power steering sensor |
| J220 | Motronic control unit |
| J293 | Radiator fan control unit, in engine compartment, front left |
| N220 | Exhaust flap valve |
| T14b | 14-pin connector, connector A on J293 |
| T14i | 14-pin connector, in engine compartment, left |
| V51 | Continued coolant circulation pump |
| 188 | Earth connection -3-, in air conditioner wiring harness |
| 283 | Earth connection -2-, in engine wiring harness |
| G | Fuel gauge sender |
| G6 | Fuel pump (pre-supply pump) |
| G169 | Fuel gauge sender -2- |
| S228 | Fuse 28 in fuse box |
| S229 | Fuse 29 in fuse box |
| S234 | Fuse 34 in fuse box |
| S243 | Fuse 43 in fuse box |
| T14i | 14-pin connector, in engine compartment, left |
| 269 | Earth connection (sender earth) -1-, in dash panel wiring harness |
| 277 | Earth connection -3-, in interior wiring harness, behind dash panel |
| A99 | Connection -1- (87), in dash panel wiring harness |
| A100 | Connection -2- (87), in dash panel wiring harness |
| * | Models with front-wheel drive |
| ** | Models with four-wheel drive |
| *** | Wiring in fuel tank |
| C10 | Suppression filter |
| D2 | Immobilizer reading coil |
| F1 | Oil pressure switch |
| F9 | Handbrake warning switch |
| J285 | Control unit with display in dash panel insert |
| K3 | Oil pressure warning lamp |
| K83 | Fault warning lamp for self-diagnosis/exhaust emissions |
| T14i | 14-pin connector, in engine compartment, left |
| T32 | 32-pin connector, blue, on dash panel insert |
| T32a | 32-pin connector, green, on dash panel insert |
| 277 | Earth connection -3-, in interior wiring harness, behind dash panel |
| A76 | Connection (diagnosis wire K), in dash panel wiring harness |
| A115 | Connection (handbrake warning), in dash panel wiring harness |
| • | CAN bus (data wire) |
| * | Models with front-wheel drive |
| ** | Models with four-wheel drive |
| E87 | Control and display unit for air conditioner |
| G17 | Ambient temperature sensor |
| G106 | Ambient temperature indicator |
| J285 | Control unit with display in dash panel insert |
| T12a | 12-pin connector, behind dash panel, right |
| T17 | 17-pin connector, behind dash panel, right, to air conditioner wiring harness |
| T32a | 32-pin connector, green, on dash panel insert |
| 97 | Earth connection -1-, in air conditioner wiring harness |
| 112 | Earth connection -2-, in air conditioner wiring harness |
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