Denso 234-9012 Air-Fuel Ratio Sensor 4 Wire, Direct Fit, Heated, Wire Length: 7.09â€

The product is exactly what i needed after installed... fix the codes on my sienna, thanks

The media could not be loaded. UPDATE: I believe if you get a check engine light within a week or less of replacing this, you need to change your downstream sensor or replace your coils / spark plugs. This was documented on a youtube video I saw. I changed my downstream sensor and reseated my coil connectors and so far no code. My connector tabs broke off when replacing my spark plugs.I just replaced this on a 2004 awd sienna.Do this by removing y exhaust pipe from bottom. 6 bolts. After that there is plenty of roomBuy the more expensive sensor removal tool that sits near the bottom of the sensor and not the one that looks like a socket.It will pop off easily.It was a slight challenge getting my socket in there but with the right removal tool and firm pressure it comes out easily

my mechanic tested the old ones before he put the new ones in and they were still working just fine so I was able to return these and get my money back but really appreciated that the mechanic said these are really good parts. Thanks.

2009 Toyota Sienna: P0031 HO2S Heater Control Circuit Low (Bank 1 Sensor 1)Check Engine, VSC, Trac lights have been on, was not a loose gas cap (this time)This sensor can be replaced from below. I used a 7/8” wrench and a pry bar.- get the van up on ramps or jack stands- disconnect the wire. I used a small flat screwdriver to spring the retaining tab.- thread the closed end of the wrench over the wire, fiddle with the position till you can get some clearance. This took the most time. Finally I had a good line-up towards the front passenger wheel.- I stuck a pry bar in from the wheel well area and pried against the frame. Got a nice creak of rusty metal and it was not hard to remove and install the new one.

I read some of the reviews here on Amazon to be sure this O2 sensor was for Bank 1 Sensor on my 2007 Toyota Sienna Sienna LE 3.5 Liter engine. And it is. Purchased this 234-9012 Denso seosor and put it on the Sienna. I then drove the Van a good 25 to 30 miles and the check engine light did not came back on so, so far this O2 sensor has worked. You will need the offset O2 Socket to remove this sensor, the socket is a 3/8 inch drive. Removing the sensor is a challenge to unplug and plug this sensor back in. Y ou will need a good bright flashlight to see up in the engine to see the plug /connection, and a small screw driver to push the locking tab over on the plug's electrical socket that is holding the plug of the sensor in the electrical socket. Be patient. Located up inside the engine above the cross frame. Look on youtube to see where this O2 sensor is located, and also download engine diagrams and you will find online that show where all four O2 sensors are located on the engine.

I was skeptical on whether Amazon was selling fake Denso sensors, and almost paid extra to buy it from OReilly's. I did buy the other Oxygen Sensor from OReilly's (needed the A/F and O2 sensor for Bank 1 of Toyota Sienna 2009.). When this one arrived, I carefully examined the box and the part and compared them to the Denso sensor I bought from O'Reillys. I am quite certain that the Amazon one was an authentic Denso part. I also compared it to the original sensor and they are the same (other than the original had an extra Toyota marking on it). I installed it in the vehicle and have had no trouble since (lights went out). The cord was exactly the same length as the sensor it replaced. I think those that claimed to short of a cord don't know the difference between bank 1 and bank 2. On a Sienna, Bank 1 is the back side of the engine, toward the firewall, and Bank 2 is the side of the engine facing toward the front of the car. Since this is not common sense, some other reveiweres likely ordered the wrong part because they had their banks mixed up.

It comes with pre-anti seized compound on the threads protected in a hard plastic cover. That eliminates messy fingers with anti seized all over the place.This Sensor is for Bank 1 sensor 1 hardest part to remove among all the 4 sensors for the 07 Sienna but with the right tools and patience you will get it done.

In short this was purchased to replace a O2 Bank 1 Sensor 1 on a 2007 Toyota Sienna HOWEVER the corresponding original attachment clip from the sensor to the car was updated to a "universal" clip that does not fit on the hard mounted receiver clip on the van. This was not made clear in the product description and thus I wasted my money on a non-returnable item. Buyer Beware!Additionally when I called to speak to the Denso Technical Engineer - AVI MERON I was met with anger, hostility and ignorance as he stated "I don't have to listen to you" and he refused to hear me out even though I discovered by going to Toyota Parts directly that Denso was selling the WRONG part. I want a REFUND, or The Correct Part and as for AVI MERON he should be disciplined as he is an embarrassment to Denso.