HTMXJA Oxygen Sensor Kit for Honda Accord & Acura TSX 2.4L — Upstream + Downstream OE Fit (2349091/2344462)

Two direct-fit oxygen sensors (upstream 2349091 and downstream 2344462) designed to restore accurate air-fuel monitoring on 2008–2012 Honda Accord and 2009–2014 Acura TSX with the 2.4L L4 engine.

If your check engine light, fuel economy, or emissions test results point to a failing oxygen sensor, this HTMXJA two-piece kit replaces both the upstream (pre-catalyst) and downstream (post-catalyst) O2 sensors with parts matching OEM fit and function. Each sensor is manufactured to meet vehicle-specific dimensions and electrical references so you can swap them in without cutting, splicing, or reprogramming. The package includes the OE reference numbers and fits commonly referenced part listings for a straightforward selection process.

How do these sensors improve driving performance?

Replacing worn oxygen sensors returns accurate lambda readings to your engine control unit, allowing the ECU to maintain the intended air-fuel ratio. Better sensor feedback reduces rough idling and inconsistent throttle response and helps the catalytic converter operate more effectively.

• Upstream sensor (OE 2349091) provides real-time exhaust oxygen levels for fuel trim corrections.
• Downstream sensor (OE 2344462) monitors catalyst efficiency after the converter.
• Tighter air-fuel control improves fuel economy and drivability.

Will these parts fit my specific Honda or Acura model?

These sensors are made for Honda Accord 2008–2012 and Acura TSX 2009–2014 with the 2.4L L4 engine. Confirm your existing OE numbers or vehicle year/make/model before ordering to ensure compatibility.

• Upstream OE references: 234-9091, 2349091, 36531-R40-A01, 211200-2758.
• Downstream OE references: 234-4462, 2344462, 36532-R40-A01, 250-24833.
• Designed to match OEM thread, connector type, and sensing characteristics.

How easy is installation and what should I expect?

Installation is intended to be plug-and-play for vehicles with matching OEM connectors and threads; most home mechanics can perform the swap with basic tools. Use anti-seize on threads if not pre-applied, torque to manufacturer specs, and clear diagnostic trouble codes after installation to verify operation.

• Direct-fit design avoids cutting or wiring changes.
• Follow factory torque and sensor gap recommendations where applicable.
• Clear any stored codes and run a short drive cycle to confirm functioning.

What warranty and quality assurances come with these sensors?

HTMXJA provides a six-month warranty covering manufacturing defects. The sensors are built from environmentally safe materials and are produced to OEM-equivalent specifications so they fit and perform like factory replacements.

• Six-month limited warranty from date of purchase.
• Manufactured materials meet environmental safety considerations.
• Packaged as an upstream and downstream matched set for balanced emissions control.

Who is this for: This two-piece HTMXJA oxygen sensor kit is for Honda and Acura owners, DIY mechanics, and repair shops that need a reliable, economical replacement for failing O2 sensors on 2008–2012 Accord and 2009–2014 TSX models with the 2.4L inline-4. If your vehicle exhibits reduced fuel mileage, rough idle, or failed emissions checks and the OE numbers match the listings provided, this kit delivers a direct-fit option to restore proper exhaust sensing and engine trim control.