Oxygen Sensors for Chrysler 300 (2011-2013) 3.6L Upstream & Downstream

Direct-Fit Replacement Oxygen Sensor Set for 2011-2013 Chrysler 300 (LD)

What it Does: The complete 4-piece oxygen sensor kit monitors pre- and post-catalytic exhaust gas concentrations on the 2011-2013 Chrysler 300 to restore closed-loop fuel trim accuracy and resolve catalytic efficiency fault codes.

The Stock Chrysler 300 Sensor Degradation

Factory zirconia O2 sensors on the Pentastar 3.6L degrade over thermal duty cycles and exhaust soot exposure. Over time, the internal sensing elements suffer from silica contamination and thermal fatigue, leading to sluggish voltage response rates. This delay prevents the powertrain control module (PCM) from properly managing stoichiometric air-fuel ratios, resulting in rich or lean fuel trim drift, engine hesitation, reduced gas mileage, and diagnostic trouble codes such as P0130 through P0161, or false-positive catalyst efficiency codes like P0420 and P0430.

The Engineering Solution

This comprehensive set provides both upstream air-fuel ratio monitors and downstream catalyst diagnostic sensors built with planar ceramic cores and rapid-heating internal elements. Each sensor features double-laser-welded stainless steel bodies to guard against exhaust heat stress and moisture intrusion. Designed to replace OEM reference numbers 234-4545 and 234-4547, these units feature pre-calibrated resistance, exact-length high-temp harness sheathing, and OE-style 4-pin weather-pack connectors for a plug-and-play installation without wire splicing or pin depinning on the LD chassis.

What's Included

• 2 Upstream Oxygen Sensors
• 2 Downstream Oxygen Sensors

Technical Specifications

Compatibility

• 2011 Chrysler 300 3.6L V6 (All Trims)
• 2012 Chrysler 300 3.6L V6 (All Trims)
• 2013 Chrysler 300 3.6L V6 (All Trims)

Frequently Asked Questions & Fitment Warnings

Does this fit the LD 300?

Yes, this is a direct fit for the 2011-2013 Chrysler 300 equipped with the Pentastar 3.6L engine.

Should anti-seize be applied to the threads during installation?

Apply high-temperature anti-seize exclusively to the sensor threads while keeping the sensing tip completely clean, and clear stored PCM fault codes post-install.

The Chrysler Caliber

Engineered to handle domestic sedan muscle and long-distance touring demands, this replacement set restores precise throttle responsiveness, prevents bore washing from rich fuel conditions, and preserves catalytic converter longevity.