Location of components, engine compartment
Not all the following components are necessarily in the car. The components vary between engine types.
| Component | Remarks | |
|---|---|---|
| 1 | Engine coolant temperature (ECT) sensor | |
| 2 | Ground terminal | |
| 3 | Coolant level sensor | |
| 4 | Camshaft reset valve | 5 cylinder turbo: exhaust camshaft, 6 cylinder normally aspirated: intake camshaft, 6 cylinder turbo: exhaust and intake camshafts. |
| 5 | Turbocharger (TC) control valve | Only turbocharged (TC) engines |
| 6 | Camshaft position sensor (CMP) | 5 cylinder turbo: exhaust camshaft, 6 cylinder normally aspirated: intake camshaft, 6 cylinder turbo: exhaust and intake camshafts. |
| 7 | Brake pedal sensor | |
| 8 | Engine speed (RPM) sensor | |
| 9 | Outer temperature sensor | |
| 10 | Power supply terminal | |
| 11 | Fusebox | |
| 12 | Relay box | |
| 13 | Mass air flow (MAF) sensor | Naturally aspirated engines: Also includes the intake air temperature (IAT) sensor |
| 14 | Intake air temperature sensor | Only turbocharged (TC) engines |
| 15 | Boost pressure sensor | Only turbocharged (TC) engines |
| 16 | Canister purge (CP) valve | |
| 17 | Ignition coil | |
| 18 | Injector | |
| 19 | Throttle unit | Also includes the throttle position (TP) sensor |
| 20 | Knock sensor (KS) | |
| 21 | Engine cooling fan (FC) control module | |
| 22 | A/C pressure sensor | |
| 23 | Engine control module (ECM) | |
| 24 | Cooling fan for control modules |