HTMXJA Oxygen O2 Sensor Kit for 2003-2007 Honda Accord L4 2.4L — Upstream & Downstream Pair, OEM Fit

HTMXJA 2-piece oxygen sensor set replaces upstream OE#234-9040 and downstream OE#234-4797 for 2003–2007 Honda Accord L4 2.4L, restoring accurate air-fuel feedback for the engine control system.

This kit includes one upstream (pre-catalytic) and one downstream (post-catalytic) O2 sensor engineered to match the fit and function of the original equipment for Honda Accord 2003–2007 with the 2.4L L4 engine. Each sensor is built from corrosion-resistant materials, wired to OEM-style connectors, and supplied to simplify direct replacement without cutting or splicing. The sensors help the vehicle’s engine control module (ECM) receive precise exhaust oxygen readings so it can adjust fuel delivery and monitor catalytic converter efficiency.

How do these sensors fit my 2003–2007 Accord 2.4L?

The HTMXJA sensors are designed to match the factory mounting points and electrical connectors for the Accord L4-2.4L. Verify your vehicle’s OE numbers before ordering to ensure compatibility.

• Direct replacements for OE# 234-9040 (upstream) and 234-4797 (downstream).
• Compatible with listed reference numbers such as 13704, 2344363, 36531RAAA01, and others.
• Plug-and-play fit with no modifications required when matched to the correct model year and engine.

What performance change can I expect after installing them?

Fresh oxygen sensors deliver more accurate voltage signals to the ECM, which helps the engine manage fuel trim more precisely. That can contribute to smoother idle, more consistent throttle response, and better long-term fuel consumption under typical driving conditions.

• Improved exhaust oxygen measurement for better fuel-air ratio control.
• Enhanced feedback to the ECM that supports stable engine operation.
• Better monitoring of catalytic converter function via the downstream sensor.

Are these sensors easy to install and what tools are needed?

The sensors are manufactured to OEM-style specifications for straightforward replacement. Basic hand tools and an O2 sensor socket make the swap quick for a DIYer or mechanic.

• Typical install requires an O2 sensor socket, ratchet, and penetrating oil for stuck fittings.
• Wiring uses the vehicle’s factory connector — no splicing needed when matched correctly.
• Installation time is usually under an hour for both sensors with standard garage tools.

What warranty and compatibility checks should I know about?

HTMXJA supplies a six-month warranty with this pair of sensors. Before purchasing, confirm your vehicle’s year, engine code, and OE part numbers to avoid fitment issues.

• Six-month limited warranty from HTMXJA covering manufacturing defects.
• Confirm OE numbers (234-9040, 234-4797) and vehicle model before ordering.
• Designed to meet OEM specifications for seamless replacement without adapters.

Who is this for: This two-piece HTMXJA oxygen sensor set is intended for Honda Accord owners and independent repair shops replacing faulty upstream or downstream sensors on 2003–2007 Accord L4 2.4L models. It’s suited to DIY mechanics looking for an OEM-style, plug-and-play replacement and professional technicians requiring reliable, cost-effective sensor parts that align with factory fitment and connector type.