I was wondering if LS430 O2 sensor or Oxygen Sensor is a common problem ? Because Ive repaired and replaced more than 8 units of them with the same problem?... when it appears Checked engine i diagnos with the computer, the same problem on every each unit.

When that happens I could only replaced new oxygen sensors then it never happens. Isnt O2 sensor or Oxygen sensors suppose to lasts a very long time?

There are 4 pieces of oxygen sensors 2 pieces front and 2 pieces at the rear... the faulty ones are the front ones. The rear ones hardly have that problem.

Anyhow if you must know the parts here i can provide you with it part numbers

Front O2 sensors -Left side = 89465-50130
-Right side = 89465-50120

Rear 02 sensors -Both are the same part numbers

= 89465-50140

Failed or worn out oxygen sensors can cause:
Failed Emission Tests
Increased Fuel Consumption
Failed Catalytic Converters
Poor Driveability
Increased Emissions

Okay ... any of u guys have that kinda problem? Let ud share and be aware of it :)

rockerfella174
Brunei Darussalam.

Well, i have not had that problem yet on my ls430, but plenty of cars we get in the shop have the costomer complaining about poor fuel economy. The o2 sensor is one of the first items we check. The reason is that it gets heated to over 300 degrees and have the micro chips were out quickly. I just dont see why Lexus would overlook the quality of the o2 sensor on the LS models, see as how there is not a lot of cost-cutting on Lexus cars

I cant do more on that badO2 sensors usually the front ones rear are hardly a problem
... so i just replace them ...

Rockerfella174

My mechanic mentioned that 9/10 times it is due to a faulty O2 sensor. When i replaced one of my Lexus oxygen sensor (http://www.lxpartsconnection.com/lexusoxygensensor.html), it cost me $224 for just the part. i called a few local lexus dealerships to get the cheapest price. highest i was qouted was 280 plus tax.. i would go through the warranty if i were you.. if not, i suggest you call around and check prices. also, i don't think it's a good idea to buy one of those universal o2 sensors.

i've had nothing but o2 sensor problems. i've used jobber and oem parts on my 2001 IS300 and the car still hesitates and back fires once in a while. i've replace the two sensors before the cat 3 times, that's 6 sensors so i'm thinking it's either wiring to the sensor or sell the thing. anyone else have the problem that i have?

(2001 IS300)ok, i finally found the fix for my constant replacement of 02 sensors, i have a $99 OBDII tool and it told me that i have had a slow oxyegen sensor banks 1 and 2 for the last 1 year. i have replaced 6 sensors and finally decided to ask the dealers. their tools are able to read deeper and give live readings, it was a lean mixture code as well as the 02 sensors, they cleaned my mass air flow sensor and replaced the leaky gasket. the car drives like it should again. no more hesitation and no more codes.