O2 Oxygen Sensor Upstream Downstream for Dodge Ram 2500 (2003-2010) 5.7L

Direct-Fit O2 Oxygen Sensor Set for 2003-2010 Dodge Ram 2500 (DH/DJ)

What it Does: The Direct-Fit Oxygen Sensor Set replaces degraded pre- and post-catalytic sensors on the 2003-2010 Dodge Ram 2500 to restore accurate stoichiometric air-fuel feedback and resolve emissions-related check engine lights.

The Stock Dodge Ram 2500 Sensor Degradation

Factory oxygen sensors on the heavy-duty DH/DJ platform endure severe thermal cycling and sustained exhaust gas temperatures during towing and hauling. Over time, carbon particulates, oil vapor, and fuel additives contaminate the porous ceramic zirconia electrolyte. This fouling blunts sensor response times, causing the powertrain control module (PCM) to miscalculate short- and long-term fuel trims (STFT/LTFT). The resulting rich or lean drift triggers poor fuel economy, rough cold idle, sluggish throttle tip-in, and diagnostic trouble codes including P0130, P0161, P0420, and P0430.

The Engineering Solution

This 4-piece set provides complete upstream and downstream bank coverage for the 5.7L HEMI V8. Manufactured with dual-layered protective sleeves and premium planar zirconia sensing elements, these sensors deliver rapid millivolt switching speeds to maintain precision closed-loop control. Each unit features factory-spec harness lengths, high-temperature wire shielding, and OE-pinned weather-pack connectors to eliminate cutting or splicing. Threaded bodies match OEM bungs for clean, leak-free sealing in high-vibration exhaust manifolds and downpipes.

What's Included

• 2 Upstream Oxygen Sensors (Pre-Catalytic)
• 2 Downstream Oxygen Sensors (Post-Catalytic)

Technical Specifications

Compatibility

• 2003-2010 Dodge Ram 2500 5.7L V8 (ST, SLT, Laramie, Power Wagon, TRX4)

Frequently Asked Questions & Fitment Warnings

Does this fit the DH/DJ Ram 2500?

Yes, this is a direct fit for the 2003-2010 Dodge Ram 2500 equipped with the 5.7L HEMI gas engine. Does not fit 5.9L or 6.7L Cummins Turbo Diesel models.

Do I need to clear PCM trouble codes after replacement?

Yes, clear stored trouble codes with an OBD-II scan tool and complete an engine drive cycle to reset fuel adaptation tables.

The Dodge Heavy-Duty Standard

Built to handle extreme towing duty and severe thermal punishment, these direct-fit sensors maintain precise fuel mapping under heavy load to safeguard your catalytic converters and restore reliable torque output.