Faulty O2 Sensor for LS430

Old 03-06-2007, 09:39 PM
Thread Starter
Join Date: Mar 2007
Posts: 24
Default Faulty O2 Sensor for LS430

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:
[ul][*]Failed Emission Tests[*]Increased Fuel Consumption[*]Failed Catalytic Converters[*]Poor Driveability[*]Increased Emissions [/ul]

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

Brunei Darussalam.

Old 09-13-2007, 06:42 PM
Join Date: Sep 2007
Posts: 4
Default RE: Faulty O2 Sensor for LS430

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
Old 09-13-2007, 07:45 PM
Thread Starter
Join Date: Mar 2007
Posts: 24
Default RE: Faulty O2 Sensor for LS430

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

Old 09-15-2007, 01:23 AM
Join Date: Sep 2007
Posts: 12
Default RE: Faulty O2 Sensor for LS430

My mechanic mentioned that 9/10 times it is due to a faulty O2 sensor. When i replaced one of my Lexus oxygen sensor, 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.
Old 05-02-2010, 11:31 PM
Junior Member
Join Date: May 2010
Posts: 2
Default 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?
Old 05-29-2010, 06:21 PM
Junior Member
Join Date: May 2010
Posts: 2

(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.
Related Topics
Thread Starter
Last Post
Off Topic
04-21-2010 03:54 AM
Lexus LX
05-10-2008 06:46 PM
New Member Area
04-22-2008 07:58 PM
Lexus ES
10-31-2007 12:18 PM
General Tech Help
01-03-2007 12:16 AM

Thread Tools
Search this Thread
Quick Reply: Faulty O2 Sensor for LS430

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.