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🔥 Master your engine’s balance with precision power ⚙️
The Denso 234-9040 Air Fuel Ratio Sensor uses a zirconium solid electrolyte to deliver highly accurate air-fuel ratio measurements within a 10:1 to 20:1 range. Engineered for durability, it withstands temperatures up to 1200°C and features a flange mount design for easy installation. Trusted by professionals and backed by Denso’s global expertise, this sensor ensures optimal engine efficiency and performance.

| ASIN | B000PWTIUG |
| Best Sellers Rank | #59,226 in Automotive ( See Top 100 in Automotive ) #10 in Automitive Electrical Air & Fuel Ratio |
| Brand | Denso |
| Brand Name | Denso |
| Country Of Origin | China |
| Customer Reviews | 4.6 out of 5 stars 465 Reviews |
| Global Trade Identification Number | 00042511112643 |
| Included Components | Air Fuel Ratio Sensor |
| Item Dimensions | 14.6 x 5.6 x 4.8 centimeters |
| Item Type Name | Air Fuel Ratio Sensor |
| Item Weight | 0.2 Pounds |
| Item dimensions L x W x H | 14.6 x 5.6 x 4.8 centimeters |
| Item weight | 0.2 Pounds |
| Manufacturer | Denso |
| Material | Zirconium |
| Material Type | Zirconium |
| Measurement Accuracy | [High] |
| Measurement accuracy | [High] |
| Measuring Range | 10:1 - 20:1 |
| Model | 234-9040 |
| Mounting Type | Flange Mount |
| Output Type | Push-Pull |
| Part Interchange Info | 234-9040 |
| Part Number | 234-9040 |
| Specific Uses For Product | automotive, electrical |
| Style | Modern |
| Style Name | Modern |
| UPC | 042511112643 |
| Upper Temperature Rating | 1200 Degrees Celsius |
S**S
Good
Good
J**N
Quality product
2003 Accord, work great. No issues perfect oem fit.
R**S
Own works like a charm . Honda 2.4
Perfect ND stock quality sensor , upstream B1S1 . No more light. Perfect lone honda dealer . It’s ND original too . Perfect clips , threads and stainless steel quality , as to be expected . Forget made in China others .
P**Y
Denso O2 sensor
OEM part for an 06 Honda Accord. Worked once installed. Check engine light is now off. I did install it myself and saved on labor cost. There are videos on you tube that will help you. I did order the special socket which you will definitely need to remove n retighten the the threaded end. The other end snaps out and in. You can also rent the socket at your local automotive store. It’s crammed in there but is doable if you know how to use a socket and wrench and wiggle it in to lock in place. Otherwise hire a local mechanic you may know to save a little or pay the high labor price at a shop if that’s your last resort. Good luck and I hope this part lasts for another 170k miles.
S**C
Tel que l'original.
Ça prend absolument le bon outil pour enlever le l'existant et remettre le nouveau, une fois installé ça fonctionne très bien.
B**3
Great fit and works good.
My check engine was coming on randomly and intermittently so checked engine codes while light was on and showed up stream 02 sensor fault. Called local part stores and looked at amazon for good 02 sensors, found and ordered this one. Looks just like original 03 Honda Accord upstream air fuel ration sensor (O2 sensor). Not the cheapest sensor I could find but the cheapest for a good reputable brand. Installation was fairly easy, would have been even easier with 02 sensor socket, but just had to bend heat shield a little for wrench to fit on sensor. Engine light went off after 25 miles of driving, or could have reset with code reader. Works great and $40 cheaper than local parts stores.
Trustpilot
4 days ago
2 weeks ago