Most common location: You'll find at least one, and likely two (one upstream and one downstream of the catalytic converter), on the exhaust manifold pipes, near the engine. They are typically threaded into the exhaust system.
To be certain:
1. Consult your vehicle's repair manual: This is the best resource. The manual will have diagrams showing the precise location of all sensors.
2. Use a repair database: Online databases like AllDataDIY or Mitchell 1 (subscription required) provide detailed diagrams and repair information for your specific vehicle.
3. Visually inspect: Look underneath the vehicle near the exhaust manifold. Oxygen sensors are usually cylindrical and have a wire harness attached. Be cautious as the exhaust system is hot when the engine has recently run.
Remember to let the engine cool completely before attempting any inspection or repair work near the exhaust system.
