TAUTOY O2 Sensor Kit for Honda Accord 2003–2007 L4 2.4L — Upstream & Downstream Pair, OEM Fit

TAUTOY's two-piece O2 sensor kit replaces both upstream and downstream sensors to restore accurate oxygen readings for compatible Honda Accord L4 2.4L engines.

If your vehicle is showing reduced fuel efficiency, inconsistent idle, or a check engine light tied to oxygen-sensor fault codes, replacing both the upstream (pre-cat) and downstream (post-cat) sensors at once can eliminate a common source of drivability problems. This TAUTOY set includes one 234-9040 upstream sensor and one 234-4797 downstream sensor engineered to fit a range of 2003–2007 Honda Accord models with the 2.4L L4 engine, built to OEM fitment specifications and backed by a one-year warranty.

Which Honda models and engines will this sensor pair fit?

This kit is designed specifically for Honda Accord models equipped with the L4 2.4L engine across multiple trims and years. Confirm compatibility by comparing the listed OEM part numbers and model years to your vehicle’s service manual or parts label before ordering.

• Fits Honda Accord 2003–2007 with L4 2.4L engines (DX, LX, EX, SE and special editions where applicable).
• Cross-references OEM numbers like 234-4797 and 234-9040 for verification.
• Includes both upstream (pre-catalytic converter) and downstream (post-catalytic converter) sensors.

How does replacing both upstream and downstream sensors help performance?

Replacing both sensors ensures the engine control unit receives accurate pre- and post-catalyst oxygen readings, which helps the engine computer adjust fuel trim correctly. Installing matched sensors reduces the chance of lingering diagnostic codes and stabilizes fuel delivery and emissions monitoring.

• Restores correct air-fuel ratio feedback to the engine control module.
• Reduces the likelihood of intermittent check-engine light returns after repair.
• Helps maintain emissions system diagnostics and catalytic converter protection.

What build quality and features does the TAUTOY kit offer?

TAUTOY sensors are manufactured with laser-welded stainless steel housings and modern sensing elements to deliver consistent oxygen partial-pressure measurement. The construction emphasizes fit and durability while matching the connector and thread specifications common to the listed OEM references.

• Double laser-welded stainless steel body for corrosion resistance and lifespan.
• Precision sensing element calibrated to provide reliable voltage/resistance signals.
• Direct-fit connectors and threads for straightforward installation without modification.

What warranty and support come with the sensor pair?

The TAUTOY kit includes a one-year limited warranty covering manufacturing defects under normal use. For installation guidance, vehicle-specific fitment questions, or warranty claims, retain your proof of purchase and contact TAUTOY support or the seller directly.

• 1-year limited warranty against defects in materials and workmanship.
• Sold as a two-piece kit (one upstream, one downstream) for matched replacement.
• OEM cross-reference numbers included for easy compatibility checks.

Who is this for: This TAUTOY O2 sensor pair is aimed at DIY mechanics and service shops working on Honda Accords with the 2.4L L4 engine who want a matched upstream/downstream replacement set. It’s suitable for owners addressing oxygen sensor fault codes, poor fuel economy, rough idle, or those performing scheduled emissions-related maintenance and who need direct-fit parts that reference common OEM numbers.