Friendly tidbit of info regarding O2 sensors
12-23-13, 06:47 PM
#46
Lexus Test Driver
Hey guys, is Denso still considered to be better then NGK today??? Is it a better outperforming brand then NGK when it comes to o2 sensors in 2013? I'm VERY curious! Any MODERN DAY responses PLEASE not tryna CLUTTER the forums!
12-25-13, 06:03 AM
#48
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I have a 99 GS300 and Bank 1 is actually towards the front of the car not driver's side, and bank 2 is towards the firewall. All of them are on the passenger side of the car/engine; 2 by 3 sets of exhaust manifolds.
Therefore, Bank 1 Sensor 1 is upstream/before Cat on the manifold set towards front of the car and Bank 1 Sensor 2 is downstream/after Cat on manifold set towards front of the car, same concept for Bank 2 sensors except they are on the manifold set towards the firewall.
I hope that helps. No such a thing as Driver side or Passenger side; and to "i ride" who posted that picture, our cars don't have V6 engines, but rather Inline-6 engines, and are RWD not FWD.
Therefore, Bank 1 Sensor 1 is upstream/before Cat on the manifold set towards front of the car and Bank 1 Sensor 2 is downstream/after Cat on manifold set towards front of the car, same concept for Bank 2 sensors except they are on the manifold set towards the firewall.
I hope that helps. No such a thing as Driver side or Passenger side; and to "i ride" who posted that picture, our cars don't have V6 engines, but rather Inline-6 engines, and are RWD not FWD.
Uh yea... Maybe YOUR car is an inline 6...But the post i was replying to was about a 430 (which is a v8), and where the drive is is irrelevant.
12-26-13, 06:53 AM
#49
12-26-13, 10:37 AM
#50
Lexus Test Driver
Thank you bro for your share of experience. I think I'm going with Denso too. NGK is a lil more expensive. By a few dollars but I see everyone favors more towards Denso. I'm just installing all new cats+gaskets+o2 sensors. I want to get it right the first time and not look back for a few years on that. I appreciate your input bro!
12-27-13, 04:48 AM
#51
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01-27-14, 07:41 AM
#52
Lexus Test Driver
Installed all gaskets, both cats, and all 4 DENSO o2 sensors last week. After repairing a lil issue with the B1 S1 wiring harness, it's all running good now. 
... I'm so happy to finally say this haha. No CEL for now... Car quiet as a mouse. And gas is being saved tremendously as I drive this car everyday. Anybody with these codes popping up, BEFORE replacing cats, always remember GASKETS AND o2 SENSORS!!!!! Exhaust leaks go hand in hand with o2 sensor codes popping up. Remember that!
... I'm so happy to finally say this haha. No CEL for now... Car quiet as a mouse. And gas is being saved tremendously as I drive this car everyday. Anybody with these codes popping up, BEFORE replacing cats, always remember GASKETS AND o2 SENSORS!!!!! Exhaust leaks go hand in hand with o2 sensor codes popping up. Remember that!
09-21-14, 11:48 PM
#54
I'm planning on getting all 4 Denso o2 sensors from Rockauto for $225.03, shipping included. All sensors are dead, hopefully I can save up and get them soon before I damage my cats.
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