Direct Fit for Honda Accord F23A4 Engine

This oxygen sensor is compatible with:

Honda Accord

• 2.3L L4
• F23A4 Engine Only

Compatible with select model years and configurations using OEM part numbers:

• 36531-PAA-L21
• 36531-PAA-L22
• 36531-PAA-L23
• 36531-PAA-307

Always verify engine code before ordering, because Honda built approximately 47 versions of the same engine just to keep parts stores emotionally unstable.

[PRECAUTIONS PURCHASE]: Please use Amazon’s Your Garage function and verify the fitment of the autopart by the year/make/model of your vehicle and the OE number of the replaceable part.

What Does an Upstream O2 Sensor Do?

The upstream oxygen sensor monitors the air-to-fuel ratio entering the engine and sends data to the ECU for fuel adjustment.

When the sensor fails, symptoms may include:

• Poor fuel economy
• Rough idle
• Hesitation during acceleration
• Check engine light
• Failed emissions testing
• Rich or lean fuel conditions

Basically, your engine starts making decisions like a Craigslist tuner build with vacuum leaks.

[SOLUTION]: Beef up engine efficiency performance and fuel economy.Reduce CO2 and other harmful emission.

Key Features

Heated Air Fuel Ratio Sensor

The built-in heating element allows the sensor to reach operating temperature faster for:

• Improved cold starts
• Better fuel management
• Reduced emissions
• Faster ECU feedback response

Direct OEM Replacement

Designed to replace factory Honda oxygen sensors without modification.

Durable Construction

Built to withstand:

• High exhaust temperatures
• Vibration
• Long-term engine heat cycles
• Daily driving abuse

Because F-series Hondas somehow survive decades of neglect, low oil, and questionable modifications.

[OE STANDARD]: The entire DrCax oxygen sensors are built to succeed in or exceed OE specifications, subject to strict quality keep an eye on testing. Every component either matches or improves on the OE design to verify fast and easy installation with superior conceivable performance and dependability.

Why Replace a Faulty Oxygen Sensor?

A bad upstream O2 sensor can dramatically affect engine performance and fuel economy. Replacing it can help:

• Restore MPG
• Improve throttle response
• Reduce emissions
• Eliminate CEL codes
• Improve idle quality

And yes, it may finally stop your Accord from smelling like unburned fuel at stoplights. How do I test my Honda oxygen sensor? Check out this guide here.

[REPLACEMENT PART NUMBER]:234-9025, 36531-PAA-L21, 36531-PAA-L22, 36531-PAA-L23, 36531-PAA-307, 24809

Installation Notes

Installation is relatively straightforward for most DIY mechanics:

• Disconnect battery
• Remove old sensor
• Install new sensor
• Connect factory harness
• Clear ECU codes

Using an O2 sensor socket is highly recommended unless you enjoy punching radiators accidentally.

[BUY WITH CONFIDENCE]: DrCax oxygen sensors comes complete with a One year after-sales service.If the sensor ever fails on your car,please tell us if you want a replacement. Save money and time by profiting from this after-sales service.

Final Thoughts

The 234-9025 Upstream Heated O2 Sensor is a solid replacement option for Honda Accord models equipped with the F23A4 engine. Whether you’re fixing a check engine light, restoring fuel economy, or simply trying to keep your daily driver alive through another year of rising gas prices, replacing a failing oxygen sensor is one of the smartest maintenance repairs you can make.

Especially on older Hondas that refuse to die out of pure spite.