Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Component Location, Engine Control Module (ECM) [2011-2012, B5254T5]
Not all components described below are installed in the vehicle. This varies between different engine types.
|  | Component | Located at/on: |
| 1 | Injectors (5 x) | Intake manifold. |
| 2 | Intake camshaft reset valve | Engine, timing belt side, by camshaft. |
| 3 | Exhaust camshaft reset valve | Engine, timing belt side, by camshaft. |
| 4 | A/C pressure sensor | Air conditioning (A/C) system high pressure pipe (thin pipe). |
| 5 | Air conditioning (A/C) pressure switch | Air conditioning (A/C) system low pressure pipe (thick pipe). |
| 6 | Turbocharger (TC) control valve | The turbocharger (TC). |
| 7 | Ignition coil (5 x) | The cylinder head. |
| 8 | Evaporative emission system (EVAP) valve | Intake manifold. |
| 9 | Camshaft position (CMP) sensor, intake | Engine, flywheel side, by the camshaft. |
| 10 | Camshaft position (CMP) sensor, exhaust | Engine, flywheel side, by the camshaft. |
| 11 | Integrated relay/fusebox | Â |
| 12 | Engine speed (RPM) sensor | Above the flywheel. |
| 13 | Mass air flow (MAF) sensor | The air cleaner (ACL) module. |
| 14 | Engine coolant temperature (ECT) sensor | The thermostat housing. |
| 15 | Engine control module (ECM) | The air cleaner (ACL) module. |
| 16 | Knock sensor (KS) | The cylinder block under the air cleaner (ACL) module. |
| 17 | Engine cooling fan (FC) control module | Â |
| 18 | Oil pressure switch | Lower front edge of the engine. |
| 19 | Boost pressure sensor | The charge air cooler (CAC) upper right-hand section. |
| 20 | Throttle unit | The engine intake manifold. |
| 21 | Fuel pressure sensor/fuel temperature sensor | Fuel rail right face. |
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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