Oxygen sensors faulty?

[E39 Ian]

E39 540i 3/1997 pre-vanos

How do I know if my oxygen sensors hare faulty? Is there a test I can do with voltmeter/test light?

If I need replacement ones - where can I get - the stealers want R2599 + VAT - I cannot afford that! No way!

Your advise and assistance would be appreciated!

 

[rick540]

Go to Goldwagen

They sell bosch generics in a kit about R750----- Works perfectly The one you want is the universal LSH-05

 

[E39 Ian]

Fantastic news:excited:

Any ideas on DIY testing? :mmm:

 

[P1000]

Short answer: No, not really.
The sensor only gives out a sensible reading at exactly 14.7 AFR, so you will need a test mixture if you want to test it. At 14.7 it should have a reading of about 0.45V. Anything richer will be >0.75V and leaner will be <0.2V
But if it the car has more than 160kkm then it is most likely dead.

You can also try bosch directly, but you might need a bosch part number. Then you will have a OEM one, but at ~half the dealer price

 

[freerider]

Short answer: No, not really.
The sensor only gives out a sensible reading at exactly 14.7 AFR, so you will need a test mixture if you want to test it. At 14.7 it should have a reading of about 0.45V. Anything richer will be >0.75V and leaner will be <0.2V
But if it the car has more than 160kkm then it is most likely dead.

You can also try bosch directly, but you might need a bosch part number. Then you will have a OEM one, but at ~half the dealer price

nice, a new member thats clued up welcome :wave: