Denso 234-4011 Oxygen Sensor Compatibility Guide: Does it Fit Your Honda or Acura?

If you are looking for the Denso 234-4011 (or its OEM equivalent) oxygen sensor, you are likely driving one of the legendary Honda or Acura models from the late 90s or early 2000s.

This specific sensor is one of the best-selling auto parts in history because it fits a wide range of incredibly reliable engines. However, buying the wrong sensor is a common mistake.

In this guide, we will confirm if part number 234-4011 fits your vehicle, explain why it's critical for fuel economy, and show you how to replace it yourself to save over $100.

(Experiencing rough idle or poor MPG but no code yet? Read our [👉 Ultimate Guide to Bad O2 Sensor Symptoms] to diagnose the issue first.)

Compatibility List: Does it Fit My Car?

The 234-4011 is a 4-Wire Upstream Oxygen Sensor designed primarily for Honda's 4-cylinder engines.

Here is the master fitment list. If your car is on this list, this is the part you need:

Honda Models

  • Honda Accord (1998-2002):

    • 2.3L EX / LX / DX (F23 Engine)

  • Honda CR-V (1997-2001):

    • 2.0L (First Generation)

  • Honda Civic (1996-2000):

    • 1.6L EX / HX (Check your trim level, some DX models use a different sensor)

  • Honda Odyssey (1999-2004):

    • 3.5L V6 (Often fits as Upstream)

  • Honda Prelude (1997-2001):

    • 2.2L

Acura Models

  • Acura CL (1997-1999): 2.3L & 3.0L

  • Acura Integra (1994-2001): 1.8L (GS-R / LS / Type R)

  • Acura TL (1999): 3.2L

(Note: Fitment can depend on whether your car is a "California Emissions" or "Federal Emissions" model. Always check the part number on your old sensor or contact us to verify.)

[👉 Shop the 234-4011 Replacement Sensor Here - Guaranteed Fit]

Technical Specs: Why is 234-4011 So Special?

This sensor is an Upstream (Pre-Cat) sensor. Its job is to measure the oxygen content in the exhaust immediately after it leaves the engine.

  • Location: Upstream (Sensor 1)

  • Wires: 4 (2 Black for Heater, 1 Blue for Signal, 1 White for Ground - colors may vary by brand but function is same)

  • Mounting: Flange Type (Two bolt holes)

Wait, what is Upstream?
It is crucial not to confuse this with the Downstream sensor. The 234-4011 controls your fuel mixture.
(Read our explainer: [👉 Upstream vs. Downstream O2 Sensors Explained])

Cost Comparison: Dealer vs. Automotive Leader

If you go to a Honda dealership, they will look up the original part number (e.g., 36531-PPA-305 or 36531-P2E-A01).

  • Dealership Price: Typically $180 - 

    250∗∗forthesensor+∗∗
    150 labor.

     

  • Our Price: You can get the exact same performance from our OEM-grade replacement for under $40.

Because this is a 4-wire heated sensor, it is simple and robust. There is no need to pay the "Honda Logo Tax" on the box. Our sensors use the same ceramic sensing technology to ensure your Check Engine Light stays off.

Your Potential Savings: Approx. $250+

[👉 Check Price for 234-4011 Replacement Sensor]

Quick Installation Guide

The best part about the 234-4011 sensor is that it is usually very accessible (right on the exhaust manifold in the engine bay).

  1. Safety: Let the engine cool down completely.

  2. Unplug: Disconnect the plastic electrical connector.

  3. Remove: Remove the two 12mm or 10mm bolts (or unscrew it if it's threaded) holding the sensor flange.

  4. Install: Place the new gasket, insert the new sensor, and tighten the bolts evenly.

  5. Connect: Plug in the new connector.

(For a more detailed walkthrough, check our guide: [👉 How to Install Oxygen Sensor: A Step-by-Step DIY Guide])

Conclusion

The 234-4011 is the unsung hero keeping millions of older Hondas and Acuras running efficiently. If you have a rough idle, poor gas mileage, or a P0134/P0135 code on one of the vehicles listed above, this simple replacement will restore your engine's performance.

Don't overpay at the dealer. Get the right part, at the right price.

[👉 Buy Your 234-4011 Replacement Sensor Now]

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