The Chrysler 300 typically has four O2 sensors — two upstream before the catalytic converter and two downstream after it. The exact count can vary by engine and year, but four is the standard configuration for the common V6 and Hemi V8 engines.
Engine options and sensor counts
Below is a breakdown by common engine configurations used in the Chrysler 300, which clarifies when you would expect four sensors versus any notable deviations.
- 3.5L/3.7L V6 era (early models): typically 4 O2 sensors (one upstream and one downstream per bank).
- 3.6L Pentastar V6 (most current models): typically 4 O2 sensors (two upstream, two downstream, one per bank).
- 5.7L Hemi V8 (Performance/Signature trims): typically 4 O2 sensors (two upstream, two downstream, one per bank).
Note: Some regional or special-order variants, such as diesel or market-specific configurations, may differ. If your vehicle has additional catalytic converters per bank or aftermarket exhaust, the number could be higher.
How to confirm on your vehicle
To confirm the exact count for your specific vehicle, consult the service manual for your model year and engine code, or inspect the exhaust system: count the upstream and downstream sensors near each bank of the catalytic converter. OBD-II trouble codes P013x and P014x map to sensor failures on Bank 1 and Bank 2 respectively, which can help identify which sensors exist on your car.
In summary, the Chrysler 300 commonly has four O2 sensors, with the exact setup depending on engine type and year. If you are replacing sensors, buying a set of four is typically correct for most models.
Summary: The standard configuration for a Chrysler 300 is four O2 sensors (two upstream, two downstream). Always verify with your model-year and engine specification, as rare regional variations or aftermarket modifications can alter the count.