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I just got a call from Lexus since my car is in the shop for electrical problems. They told me that they need to replace all the o2 sensors. The price was $2400!!! Now I don’t have that and I’m thinking of replacing them myself... can anyone in the forum tell me how hard is the job? And do y’all know the locations and do y’all know the numbers of the sensors so I can get it done? Thanks in advance family!!!!
As long as you have a simple mechanical knowledge and posses the access to tools and a way to lift the vehicle, then sure you should. Just purchase an import O2 sensor socket and have an appropriate socket wrench to use to remove the O2s with.
I highly recommend using factory replacement Denso sensors. Sidenote, when I replaced my factory headers with an aftermarket set, I went ahead and replaced all four of my O2 sensors. Was < $400 for all four.
The replacement sensors should come with anti-seize which I highly recommend you using.
Bank 1, Sensor 1 (RH, Upstream): Lexus Part No. 89467-30020, Denso Part No. 234-9058, NTK Part No. 24833
Bank 2, Sensor 1 (LH, Upstream): Lexus Part No. 89467-30010, Denso Part No. 234-9051, NTK Part No. 24833
Bank 1, Sensor 2 (RH, Downstream): Lexus Part No. 89465-30730, Denso Part No. 234-4521, NTK Part No. 24840
Bank 2, Sensor 2 (LH, Downstream): Lexus Part No. 89465-53230, Denso Part No. 234-4518, NTK Part No. 24842
Generally speaking, my preference in terms of quality would be Lexus, Denso, then NTK; as far as price, Denso or NTK will both be significantly cheaper than Lexus. Denso makes the Lexus sensors, and so are basically the same as the original sensors for a fraction of the price. As Gville mentioned, they're likely the way you should go.
the quote is kinda high I think because they have to basically have to remove the driver seat and remove the carpet to access the O2 sensor under the driver side seat.If you do DIY it, me and my buds just cut a small slit in the carpet and slid the o2 sensor through. It's under the seat so nobody is going to see it anyways.
the quote is kinda high I think because they have to basically have to remove the driver seat and remove the carpet to access the O2 sensor under the driver side seat.If you do DIY it, me and my buds just cut a small slit in the carpet and slid the o2 sensor through. It's under the seat so nobody is going to see it anyways.
This is NOT necessary. You can simply pull down the carpet nearest the trans tunnel down towards the seats enough to be able to gain access to the factory O2 connection, sensor connection, and the rubber boot in the foot-well.
This is NOT necessary. You can simply pull down the carpet nearest the trans tunnel down towards the seats enough to be able to gain access to the factory O2 connection, sensor connection, and the rubber boot in the foot-well.
Haha i guess this would've been useful a month or two ago. I looked at the DIYs and they always mentioned removing the carpet, removing center console stuff or etc.
This is NOT necessary. You can simply pull down the carpet nearest the trans tunnel down towards the seats enough to be able to gain access to the factory O2 connection, sensor connection, and the rubber boot in the foot-well.
Can someone elaborate on the steps or specific location to gain access to the back 2 O2 Sensor connectors. I am trying to replace the 2 downstream O2 sensors thinking it would be super easy, and once I put the car on the lift and went to replace them I realized the darn wiring harness is up inside the car. I can pull back the carpet, but I am looking for a little more detail so I don't pull away too much or break anything in the process. I have a 2010 IS350 RWD. Thanks! Danais350
**Anyone in the Wisconsin area that does it and/or midpipe work let me know. I got an invidia midpipe I am trying to swap out from stock but the darn bolts are rusted on so I need help to get them torched off. Thanks!**
Thanks... i can't believe something that typically doesn't last the lifetime of the car would have been made so damn frustrating to gain access too.
Some people have said you don't need to remove the seats and dont need to remove all the carpet. Some say to just peel back the carpet against the mid console wall since that is where the connector is. Anyone try this rather then tear apart the entire carpet and seats to access the plug? Thanks!
Some people have said you don't need to remove the seats and dont need to remove all the carpet. Some say to just peel back the carpet against the mid console wall since that is where the connector is. Anyone try this rather then tear apart the entire carpet and seats to access the plug? Thanks!
I just did this last weekend replaced both rear 02 sensors. Bank 1 sens 2 kept on showing pending p0420 after repeating several ECU resets. I knew It was not the cat converter as the car still runs great. The only issues was probably a lazy rear 02. I'm at 90k miles so its probably was due. When the pending status would show up performance was affected. Some people say Toyota doesn't use rear o2 for fuel trims. I think they actually do to help preserve the cat from failure. So for what I found online mentioned it too.
So for the AWD 250 front driver seat has to be unbolted. You can position the seat in the middle of the track, and remove the 4 bolts. Remove the wire harness under the seat. Then just lay the seat backwards. Pull the carpet all the way until it's about where the front inner track front bolt sits. That's how far back the connector is.
Passenger just peel the carpet back connector is pretty much near the front of the console. The seat must be moved all the way back too.
Last you need the 02 sensor tool 1/2" drive 50mm deep, and it will make the install a breeze.
I just did this last weekend replaced both rear 02 sensors. Bank 1 sens 2 kept on showing pending p0420 after repeating several ECU resets. I knew It was not the cat convetter as the car still runs great. The only issues was probably a lazy rear 02. I'm at 90k miles so its probably was due. When the pending status would show up performance was affected. Some people say Toyota doesn't use rear o2 for fuel trims. I think they actually do to help preserve the cat from failure. So for what I found online mentioned it too.
So for the AWD 250 front driver seat has to be unbolted. You can position the seat in the middle of the track, and remove the 4 bolts. Remove the wire harness under the seat. Then just lay the seat backwards. Pull the carpet all the way until it's about the front inner track front bolt resides. That's how far back the connector is.
Passenger just peel the carpet back connector is pretty much near the front of the console. The seat must be moved all the way back too.
Last you need the 02 sensor tool 1/2" drive 50mm deep, and it will make the install a breeze.
Do you know if the Driver Side O2 connector is the same on the IS350 as it is on the AWD 250? Where the seat must be unbolted? Again I read on the forums to just pull back from middle console and that the gas pedal can get slightly in the way. I am just curious if all the IS's are the same location or different by 350 vs 250 and RWD vs AWD. I have a 350 RWD.
Do you know if the Driver Side O2 connector is the same on the IS350 as it is on the AWD 250? Where the seat must be unbolted? Again I read on the forums to just pull back from middle console and that the gas pedal can get slightly in the way. I am just curious if all the IS's are the same location or different by 350 vs 250 and RWD vs AWD. I have a 350 RWD.
If you can poke your head under and check where the cable runs into the body. You can see how far back the connector will be. I assume it's in the same location for all IS250/350 for the driver side. The connection is pretty much located on the floor board. I don't see how it could be reached via pulling the carpet from the center console.
06-04-19, 11:42 AM
Need O2 sensor numbers
