O2 sensors - what do they do????

[zun]

Zun,

You need to reset your "Consumption 1 or 2 " at your OBC.

When I can call you, to guide me on how to reset the obc?

 

[zun]

guys,

The price is quite reasonable now. I got mine for RM375/pcs at Bavarian Auto. You need 2 pre-cat O2 sensors. So, total RM750.

 

[abuhasan]

guys,

The price is quite reasonable now. I got mine for RM375/pcs at Bavarian Auto. You need 2 pre-cat O2 sensors. So, total RM750.

thanks for the info zun.
hopefully BA kuan open on saturday...

 

[zun]

thanks for the info zun.
hopefully BA kuan open on saturday...

Last I checked with them 2 days ago, they dont have stock. But no harm trying to recheck.

 

[abuhasan]

...ingat sabtu odway bck nk singgah kuantan to get it.

 

[bmw7833]

I am willing to organize the GB but too many different parts number for o2 sensor between BMW model and made me think twice.

 

[bmw7833]

guys,

The price is quite reasonable now. I got mine for RM375/pcs at Bavarian Auto. You need 2 pre-cat O2 sensors. So, total RM750.

Bosch? RM375 is consider cheap. Even we get from outside still need to pay tax and freight cost, save only few bucks, so just buy local aje la.

 

[harbhajan]

O2 sensor (lamda) is the most neglected item coz even it is deteriorated, the engine will still run but not at the optimum level. But then, O2 sensors are pricey in Malaysia (for e39 with BMW logo made by Bosch RM1,200 each and OEM by Bosch RM520.00 each). Bought mine online from a USA site for USD 69.00 each.

why not start a group buy.i am in.tq

 

[alantiong]

i bought 2 units from lambda UK and the result is immediate saving of 10% in fuel consumption. I paid GBP69 per unit.

Smooth Idle and at consant speed. I had my old one around 150K

 

[alantiong]

by the way.. the original one and the one i bought.. both are the same... different packing.. both bosch made in USA

 

[bmw23]

GB Please:rock::rock::rock::rock:

 

[lwloh]

Changed my O2 sensors

Dear all,

I got advised by Herbert when i first got my car last 2 months ago to change my 02 sensor. In fact my mileage was bout 130k km and the car is fine buy took some advise and changed it.
I just changed my 02 sensors last week at Albert, WP Auto. He actually brought it in from Singapore for me. Changed 2 nos of pre-cat 02 sensors which according to him is more important then the post-cat. is cost me RM 810, RM 380 each for the sensor and RM 50 for labour. It's OEM from Bosch. Took out the existing sensors and it's also from Bosch as well with same part no. 0258005259. So if price about tat range, senang ask albert buy from Sing and go pasang there. Maybe you all GB then can be cheaper too.

Some photos for you all to see see look look. Old sensors on left pic, installed sensors in middle pic and new sensors at right pic.
View attachment 18198View attachment 18199View attachment 18200
Happy Chinese New Year to you all.

 

[Alex5522]

Dear all,

Changed 2 nos of pre-cat 02 sensors which according to him is more important then the post-cat.

Bro don't mind to share what's the difference between pre-cat AND post-cat 02 sensor ?
Thanks and Gong Xi Fatt Chai.

 

[IanDaddy]

Anyone tried this test . http://www.zerotohundred.com/newforums/toyota/322013-checking-your-o2-sensor.html

 

[Herbert]

Those who are interested to know more about 02 sensors, go to http://www.boschautoparts.com/OxygenSensors/Pages/OxygenSensorOverview.aspx

 

[abuhasan]

o2 sensor: its really confusing me.

my n42, msport coupe has 5/ o2 sensors
3/called regulating lambda probe & 2/ lambda monitor sensor (as per realoem.com)
by changing all the 5 sensors, someone quoted me at rm 3.6k inclusive labor for OEM Bosch.
is it ok for me to change the 2 lambda monitor sensors first then followed by regulating probe later?
whats the diff between regulating probe & monitor sensor?

 

[zidee]

My ride is E39 525i year 2000

Sometimes when my engine really cold upon starting the engine slightly vibrate. Not smooth. Sometimes engine check light come out. Plug in my PA Soft 1.4 scanner and I get this message in DME module

"Oxygen sensor heater after catalyst bank 1, open circuit"

It indicate that the Post cat sensor need replacement. Send the error message to eBay parts supplier I was recommended with this unit
(http://cgi.ebay.com/ebaymotors/ws/e...584&ssPageName=STRK:MESINDXX:IT#ht_1912wt_854) at USD74.95 per unit. About RM235. Shipment cost reasonable as i ordered other stuff as well. Advised to replace both units

Note : O2 sensor come in pair...2 for pre/before/front cat and 2 after/post/rear cat

I wonder where there is an indicator where is the Bank 1 located so i can still keep sensor from bank 2 which is still working. anybody can advise this?

On the other note about engine slightly vibrate when its cold. I discover that when you run live data from the scanner, the O2 sensor is going through the "heating" process, good sensors heat faster so when some did not "heat" at the same time, its gave wrong reading that makes the engine misfire. Once the engine warm and all the sensors "heated", the engine stable and no engine check lights out. Live data will mark each sensors.

You can live with spoiled O2 sensors but your fuel consumption is not consistent. The longer you wait to replace it, the more you loose money burning unnecessary petrol. Unless you hardly use your ride.

 

[bmw7833]

My ride is E39 525i year 2000

Sometimes when my engine really cold upon starting the engine slightly vibrate. Not smooth. Sometimes engine check light come out. Plug in my PA Soft 1.4 scanner and I get this message in DME module

"Oxygen sensor heater after catalyst bank 1, open circuit"

It indicate that the Post cat sensor need replacement. Send the error message to eBay parts supplier I was recommended with this unit
(http://cgi.ebay.com/ebaymotors/ws/e...584&ssPageName=STRK:MESINDXX:IT#ht_1912wt_854) at USD74.95 per unit. About RM235. Shipment cost reasonable as i ordered other stuff as well. Advised to replace both units

Note : O2 sensor come in pair...2 for pre/before/front cat and 2 after/post/rear cat

I wonder where there is an indicator where is the Bank 1 located so i can still keep sensor from bank 2 which is still working. anybody can advise this?

On the other note about engine slightly vibrate when its cold. I discover that when you run live data from the scanner, the O2 sensor is going through the "heating" process, good sensors heat faster so when some did not "heat" at the same time, its gave wrong reading that makes the engine misfire. Once the engine warm and all the sensors "heated", the engine stable and no engine check lights out. Live data will mark each sensors.

You can live with spoiled O2 sensors but your fuel consumption is not consistent. The longer you wait to replace it, the more you loose money burning unnecessary petrol. Unless you hardly use your ride.

Bro, can i tumpang your order?

 

[Herbert]

Zidee,

The after cat 02 sensors are not important (just to monitor emission) and won't affect the performance of the car.

As for engine vibrate when it's cold, try to clean your MAF with CRC MAF cleaner.

 

[IanDaddy]

o2 sensor: its really confusing me.

my n42, msport coupe has 5/ o2 sensors
3/called regulating lambda probe & 2/ lambda monitor sensor (as per realoem.com)
by changing all the 5 sensors, someone quoted me at rm 3.6k inclusive labor for OEM Bosch.
is it ok for me to change the 2 lambda monitor sensors first then followed by regulating probe later?
whats the diff between regulating probe & monitor sensor?

I think the regulating ones are precat, used to regulate air-fuel mixture. postcat ones are used to monitor the actual emission and cat converter health.
my 2 sen