Oxygen Sensors for Honda CR-V (2002-2004) 2.4L Upstream

Direct-Fit Upstream Oxygen Sensor for 2002-2004 Honda CR-V

What it Does: The Upstream Oxygen Sensor replaces the degraded factory air-fuel ratio sensor on the 2002-2004 CR-V to restore precision closed-loop fuel metering, correct erratic idle, and recover factory fuel economy.

The Stock Honda CR-V Sensor Degradation and Trim Drift

Over time, the factory upstream sensor on the K24A1 engine succumbs to heavy thermal cycling, carbon blow-by accumulation, and exhaust contamination. As the internal zirconia substrate degrades, its response latency increases, causing the engine control module (ECM) to calculate incorrect short-term and long-term fuel trims. This thermal decay leads to hunting idles, fouled spark plugs, unburned hydrocarbon emissions, and inevitable diagnostic trouble codes like P0134 or P0135.

The Engineering Solution

Engineered to restore critical closed-loop accuracy, this upstream sensor utilizes a fast-acting ceramic planar sensing element paired with an integrated platinum heater for rapid closed-loop activation during cold starts. The assembly features a high-grade 304 stainless steel protective housing double-laser-welded to seal out moisture and prevent exhaust soot contamination. High-temperature PTFE-insulated wiring harness leads eliminate resistance drift and electrical cross-talk, ensuring exact millivolt signal transmission back to the ECU for stoichiometric combustion control.

Technical Specifications

Compatibility

• 2002 Honda CR-V LX, EX (2.4L L4 - Gas)
• 2003 Honda CR-V LX, EX (2.4L L4 - Gas)
• 2004 Honda CR-V LX, EX (2.4L L4 - Gas)

Frequently Asked Questions

Does this fit the RD7 CR-V?
Yes, this is a direct fit for the 2002-2004 Honda CR-V equipped with the K24A1 engine.

Is this a wideband air-fuel ratio sensor or a narrowband sensor?
This unit is the primary upstream wideband air-fuel ratio sensor required for real-time AFR feedback ahead of the catalytic converter.

The Honda Engineering Standard

The K24A1 architecture relies on precise exhaust feedback to balance i-VTEC transition points and stoichiometric efficiency. Fitting an exact-match upstream oxygen sensor restores targeted lambda regulation, eliminating rich-running conditions to preserve your catalytic converter and engine power curve.