TAUTOY Upstream & Downstream O2 Oxygen Sensor Kit for Honda Accord 2003-2007 2.4L — 2-Piece OEM Fit, Stainless-Steel

TAUTOY supplies a matched pair of upstream and downstream oxygen (O2) sensors engineered to restore accurate air–fuel readings for Honda Accord 2003–2007 2.4L engines.

These two sensors—one upstream (pre-catalyst) and one downstream (post-catalyst)—are built to match factory fit and function for many 2.4L Accord variants. They use a stainless-steel housing with robust welding and proven sensing elements to deliver stable voltage feedback to the engine control module (ECM). Included are common OEM reference numbers so you can confirm compatibility before installation.

Which Honda models and engines will these sensors fit?

They are intended for Honda Accord models with the 2.4L L4 engine from model years 2003 through 2007, covering sedan and coupe trims listed below. Always verify the OEM part cross-reference or the vehicle’s existing sensor numbers to ensure exact fitment.

• Compatible trims: DX, EX (Coupe & Sedan), LX (Coupe & Sedan), LX Special Edition, SE, Value Package.
• Engine: L4 2.4L (K24 family) applications.
• Years covered: 2003–2007 (specific trims noted in product specifications).

What OEM numbers and replacements do these sensors cover?

Each sensor in the set maps to widely used factory references, making them suitable replacements for a number of original part numbers. Check your current sensor or service manual to match references.

• Replaces: 234-4797 (downstream) and 234-9040 (upstream).
• Also cross-references: 13704, 2344363, 36531RAAA01, 36531RAAA02, 36532RAAA01, 36532RAAA02, 36532RAAA11, 36532RAD305, 36532RADL11, 36532RADL12.
• Sold as a 2-piece kit to refresh both pre- and post-catalyst sensing for balanced readings.

How do these sensors affect engine performance and diagnostics?

Oxygen sensors supply the ECM with precise measurements of exhaust oxygen content so the fuel trim can be adjusted. Replacing worn or faulty sensors helps return fuel control to the intended range and supports cleaner combustion and steadier engine behavior.

• Restores accurate air–fuel feedback to the ECM for better fuel trim control.
• Can reduce rough idle, hesitations, or drivability issues caused by erratic sensor readings.
• Helps pass emissions checks when sensors are the cause of elevated readings or diagnostic trouble codes.

What are the build quality and warranty details?

These TAUTOY sensors feature a laser-welded stainless-steel housing and sensor elements designed for corrosion resistance and reliable signal output. The package includes a one-year limited warranty for manufacturing defects.

• Construction: double laser-welded stainless-steel body for durability.
• Performance: designed for precise oxygen partial-pressure sensing and consistent voltage output.
• Warranty: 1 year against manufacturing defects (terms apply).

Who is this for: This 2-piece TAUTOY O2 sensor kit is aimed at Honda Accord owners, DIY mechanics, and independent shops needing a direct-fit upstream and downstream replacement for 2.4L models from 2003–2007. If your vehicle shows OBD-II codes related to oxygen sensors, exhibits fuel economy loss, or you want to proactively replace aging sensors, this matched pair provides a cost-effective way to restore proper exhaust sensing and help your engine management system operate as designed.