Engine management system (BPG, BGB, BWE, BUL and BYK from August 2004; BWT from June 2006; BPJ from November 2006) (Audi A4 B7)

1-1 Fuses, power supply
* until October 2004.;
** since November 2004.;
*** for models with manual transmission;
**** for models with AT, see AT diagram;
***** step-by-step modification

1-2 ECM, Engine Component Power Relay, ECM Motronic Power Relay, Fuses
* models with AT AG6;
** models with CVT01J/0AN

1-4 ECM, injectors, left powertrain mount solenoid valve
* until October 2004.;
** since November 2004.;
*** models with AT AG6

1-5 Solenoid valve for regulating the boost pressure, Solenoid valve 1 EVAP
* models with a diagnostic pump for the system;
** N₂76 replaced by N₂90

1-5 ECM, lambda probes

1-6 ECM, CKP sensor, Knock sensor

1-7 ECM, absolute altitude sensor, IAT and ECT sensors, intake manifold flap potentiometer, low-pressure fuel pressure sensor, intake manifold flap actuator

1-8 ECM, Boost Pressure Sensor, CMP Sensor, Fuel Pressure Sensor, Intake Manifold Pressure Sensor

1-9 ECM, Air Flow Meter, Intake Camshaft Control Valve 1

1-10 ECM, Brake Light Sensor, Accelerator Pedal Position Sensor, Throttle Body Module *See ABS system diagram; **for models with manual transmission

1-11 ECM, ignition coils, engine oil level and temperature sensor

1-12 ECM, control unit in the instrument panel insert, AT control unit
* for models with AT AG5;
** for models with CVT01JCAT;
*** cancelled for models without AT

1-13 Control unit in the instrument panel insert, fuel pump control unit, fuel system filling pump, fuel reserve sensor No.2
* Connector cancelled for AWD models;
** for AWD models;
*** ground signal output

1-14 Control unit in instrument panel insert, low coolant level sensor, engine oil pressure sensor
* for models from 2006.;
** for models from August 2004.