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.
1998 Buick Century CustomFACTORY OEM SERVICE PROCEDURE
Component Locations
COMPONENT LOCATIONS (VIN M)
| Component | Location | |
|---|---|---|
| A/C Compressor Relay | Right Rear Of Engine Compartment | |
| A/C Pressure Sensor | Right Front Of Engine Compartment | |
| Camshaft Position (CMP) Sensor | Front Top Of Engine | |
| Convenience Center | Left Of Steering Column, Behind Instrument Panel | |
| Crankshaft Position (CKP) Sensor | ||
| 7X | Right Front Side Of Engine | |
| 24X | Lower Front Of Engine | |
| Cruise Control Module | Front Of Dash | |
| Data Link Connector | Under Left Side Of Instrument Panel | |
| EGR Valve | Right Front Of Engine | |
| Engine Coolant Temperature ECT) Sensor | Top Rear Of Engine | |
| Engine Oil Level Switch | Rear Bottom Of Engine | |
| Engine Oil Pressure Sensor | Right Front Corner Of Engine | |
| EVAP Canister Purge Solenoid | Top Rear Of Engine | |
| EVAP Canister Vent Solenoid | Right Front Corner Of Engine Compartment | |
| Fuel Injectors | In Intake Manifold | |
| Fuel Pump Relay | Right Rear Of Engine Compartment | |
| Fuel Tank Pressure Sensor | Front Of Fuel Tank | |
| Idle Air Control (IAC) Valve | Top Front Of Engine | |
| Ignition Control Module | Left Rear Of Engine Compartment | |
| Intake Air Temperature (IAT) Sensor | Left Rear Of Engine | |
| Knock Sensor | Left Rear Of Engine | |
| Manifold Absolute Pressure MAP) Sensor | Front Top Of Engine | |
| Mass Airflow (MAF) Sensor | Left Front Of Engine | |
| Oxygen Sensors (O2S) | ||
| Pre-Converter | Top Rear Of Engine, In Left Exhaust Manifold | |
| Post-Converter | Center Of Passenger Compartment, Rear Of Catalytic Converter | |
| Powertrain Control Module (PCM) | Right Side Of Instrument Panel, Near Steering Column | |
| Throttle Position (TP) Sensor | Top Front Of Engine | |
| Transaxle Range Switch | Left Rear Of Engine Compartment | |
| Vehicle Speed Sensor | Right Rear Of Engine | |
Factory Service Tools
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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