QIJIAUTO Upstream & Downstream O2 Oxygen Sensor Kit for Honda Accord 2008–2012 — Heated 2PCS, Direct-Fit

QIJIAUTO two-piece upstream and downstream heated oxygen sensor kit restores accurate air-fuel monitoring for compatible Honda Accord and Acura TSX models.

These two replacement oxygen sensors (one upstream/front and one downstream/rear) are designed as direct-fit heated sensors for Honda Accord 2.4L model years 2008–2012 and Acura TSX 2.4L 2009–2014. Built with a protective coating and silver-alloy mating for installation durability, the kit addresses common sensor failures that trigger fault lights, rough idle, and reduced fuel economy when the original sensors age or become contaminated.

How will replacing both upstream and downstream sensors affect engine performance?

Replacing both sensors helps the engine control unit regain accurate oxygen readings before and after the catalytic converter, allowing better fuel trim corrections and smoother driveability. You’ll notice more consistent throttle response and fewer ECU-driven adjustments once valid sensor data is restored.

• Restores accurate oxygen measurement for closed-loop fuel control
• Reduces ECU corrective fuel trims and search cycles
• Helps steady idle and improves acceleration smoothness

What are the key specifications and how do they match my vehicle?

These are heated (4-wire) threaded sensors with female connectors and two different harness lengths (approximately 360mm and 280mm) to match upstream and downstream placements. They are manufactured to fit the original mounting size so they replace OE items such as part numbers 234-9091 (upstream) and 234-4462 (downstream).

• Sensor type: Heated, 4-wire design for quicker warm-up
• Wire harness lengths: ~360mm and ~280mm to suit front and rear positions
• Mounting: Threaded OEM-style fitment for direct replacement

How durable are these QIJIAUTO sensors and what protections do they include?

The sensors incorporate a protective surface treatment to resist contamination and poisoning from exhaust byproducts, plus a silver-alloy joint to aid a secure, corrosion-resistant connection during installation. These design choices increase service life compared with untreated units and reduce the chance of premature failure due to exposure.

• Protective coating to limit sensor poisoning and deposits
• Silver alloy joint for reliable, long-lasting electrical and mechanical connection
• Engineered for sustained operation in harsh exhaust environments

Which vehicles are compatible and how should I verify fitment?

This two-piece sensor kit is specifically made for Honda Accord 2.4L models from 2008 through 2012 and Acura TSX 2.4L from 2009 through 2014. Before buying, confirm your vehicle’s engine size, model year, and current OE part numbers to ensure proper match; these sensors are not intended for other Honda platforms like CR-V.

• Compatible: Honda Accord 2.4L (2008–2012)
• Compatible: Acura TSX 2.4L (2009–2014)
• Not compatible with Honda CR-V or other unrelated engine variants

Who is this for? This QIJIAUTO O2 sensor pair is aimed at DIY mechanics, independent repair shops, and owners of the specified Honda Accord and Acura TSX models who need a cost-effective, direct-fit replacement for malfunctioning oxygen sensors. If your vehicle shows a check engine light with O2-related codes, experiences rough idling, or has increased fuel usage and you confirmed the engine and year fitment, this kit provides the upstream and downstream sensors necessary to restore proper exhaust sensing. Always verify OEM part numbers and connector type prior to installation and follow proper torque and anti-seize recommendations when fitting threaded exhaust components.