HTMXJA Oxygen Sensor Kit for Honda Accord 2008–2012 & Acura TSX 2009–2014 2.4L — Upstream & Downstream OE Fit

HTMXJA’s 2-piece oxygen sensor kit replaces the upstream (2349091) and downstream (2344462) O2 sensors for Honda Accord 2008–2012 and Acura/TSX 2009–2014 with the 2.4L L4 engine.

If your vehicle shows a check engine light, rough idle, or reduced fuel economy, worn oxygen sensors can be a common cause. This HTMXJA kit includes both upstream and downstream sensors matched to OE reference numbers to ensure fitment with Accord 2008–2012 and TSX 2009–2014 L4‑2.4L engines. Built to OEM-style specifications, the sensors monitor exhaust oxygen levels so your engine management system can optimize air-fuel mixture and emissions performance.

How will these sensors fit my 2008–2012 Accord or 2009–2014 TSX?

These sensors are supplied specifically for the 2.4L inline‑4 models and correspond to OE part numbers for direct replacement. The upstream sensor uses reference 2349091 and the downstream uses 2344462, matching factory positions and plug types for a bolt‑in swap without modifications.

• Compatible models: Accord 2008–2012 L4‑2.4L; TSX 2009–2014 L4‑2.4L.
• Upstream (pre‑catalyst): OE reference 2349091.
• Downstream (post‑catalyst): OE reference 2344462.
• Designed to OEM dimensions and connector types for straightforward installation.

What performance changes should I expect after installation?

Replacing faulty O2 sensors restores accurate oxygen readings to the engine control unit, which helps the ECU adjust fuel injection timing and mixture. You may notice steadier idle, improved throttle response, and better fuel economy if the old sensors were degrading.

• Restores accurate air–fuel feedback to the ECU.
• Can reduce rough idling and engine hesitations caused by bad sensors.
• May improve MPG if previous sensors reported incorrect oxygen levels.
• Helps catalytic converter operate efficiently by ensuring proper fuel mixture.

Are these HTMXJA sensors durable and easy to install?

HTMXJA sensors are manufactured from corrosion‑resistant materials and built to environmental safety standards. They come as a matched upstream/downstream pair and are engineered for easy installation using standard O2‑sensor sockets and basic hand tools.

• Constructed with high‑quality, environmentally friendly materials.
• Sold as a matched two‑sensor kit for complete replacement projects.
• Fits OEM mounting points and wiring harnesses—no cutting or splicing required.
• Six‑month limited warranty included; verify OE numbers before purchase.

Which part numbers and cross‑references should I check before buying?

Confirming OE numbers prevents fitment issues. This kit lists both the main OE references and common cross‑numbers used by mechanics and parts suppliers to help you verify compatibility quickly.

• Primary references: 234‑9091 (upstream) and 234‑4462 (downstream).
• Additional cross numbers: 36531‑R40‑A01, 211200‑2758, 250‑54038, SU11740, 36532R40A01.
• Compare with the sticker or service manual on your vehicle to confirm match before ordering.
• Perfect fit to OEM specifications for straightforward replacement.

Who is this for: This HTMXJA 2‑pack is suited to DIY mechanics and professional technicians working on Honda Accord (2008–2012) or Acura/TSX (2009–2014) 2.4L L4 vehicles who need a direct OE‑style upstream and downstream oxygen sensor replacement. It’s a practical choice if you want matched sensors that restore proper engine feedback, improve drivability, and help maintain emissions performance without expensive dealership parts prices. Always confirm your vehicle’s engine code and OE numbers before purchasing to ensure exact compatibility.