Maxfavor O2 Oxygen Sensor Pair for 2002-2004 Honda CR-V 2.4L L4 — Upstream & Downstream Direct-Fit

MAXFAVOR upstream and downstream oxygen sensors (234-9005 & 234-4125) are direct-fit replacements designed to restore proper air–fuel monitoring for 2002–2004 Honda CR-V EX, LX and Base 2.4L models.

If your CR-V is throwing OBD-II fault codes related to O2 sensors or you notice reduced fuel economy and rough idling, a worn oxygen sensor can be the culprit. These MAXFAVOR sensors are built to match factory dimensions and electrical connections for the listed Honda models, offer corrosion-resistant materials, and come as a matched upstream (pre-catalyst) and downstream (post-catalyst) pair to help the engine control module read exhaust oxygen levels accurately.

How do these sensors fit my 2002–2004 Honda CR-V?

The MAXFAVOR pair replaces OE part numbers 2349005 and 2344125 and fits CR-V EX, LX and Base trims with the 2.4L L4 engine. Each sensor is manufactured to align with factory thread size, connector type, and mounting position so they install without major modifications.

• Compatible with model years: 2002, 2003, 2004 (Honda CR-V L4 2.4L)
• OE cross-references: 2349005, 2344125, 36531-PLM-A11, 36531-PLE-305, 36532-PPA-004, 36531-PPA-305, 36531-PPA-A01
• Includes one upstream and one downstream sensor for matched performance
• Direct-fit connectors to avoid splicing or adapters

What improvements should I expect after installation?

Replacing faulty oxygen sensors helps the engine computer fine-tune fuel delivery and emissions control. While results vary by vehicle condition, you can typically expect steadier idle behavior, improved throttle response, and more consistent fuel economy compared with a failing sensor.

• More accurate air–fuel ratio readings for the ECU
• Potential restoration of factory fuel efficiency and smoother idle
• Helps maintain catalytic converter performance by proper monitoring
• Reduces likelihood of persistent O2-related fault codes

How do I install these O2 sensors safely and correctly?

Installation is straightforward for anyone familiar with basic under-vehicle work, but use caution around hot exhaust components. Follow the step sequence: locate and remove the old sensors, compare new parts to ensure match, clean the threads, install and torque to spec, then reconnect the harness and clear any diagnostic trouble codes if present.

• Step 1: Locate upstream and downstream sensor positions and remove with an oxygen-sensor socket
• Step 2: Verify new sensor matches the removed unit before fitting
• Step 3: Clean the sensor port threads, then hand-start and tighten to avoid cross-threading
• Step 4: Reconnect wiring, route harness to prevent rubbing, and clear codes if needed

What should I check before ordering to ensure fitment?

Confirm your vehicle year, engine (L4 2.4L), and trim (EX, LX, Base) match the listed applications. Cross-check the old sensor’s electrical connector and part number to the OE references provided to avoid purchasing the wrong unit.

• Verify your CR-V is a 2002–2004 model with the 2.4L L4 engine
• Compare connector style and thread length with your existing sensors
• Match against OE numbers printed in the product listing before purchase
• Contact support with photos if you have any uncertainty

Who is this for: These MAXFAVOR oxygen sensors are intended for DIY mechanics and professional technicians replacing failing O2 sensors on 2002–2004 Honda CR-Vs with the 2.4L four-cylinder engine. They suit buyers who need a direct-fit upstream and downstream sensor pair that follows OE specifications and want clear fitment cross-references to confirm compatibility before installation.