Need help to order e39 lambda sensor

Was looking to purchase a bosch sensor for my e39 as one of them has failed but cannot narrow down what I need
The error says high voltage before kat bank 1
So best price I found with free delivery is micks garage at 98 euro which is good price
Does anyone know exactly which part I need ?

Also the temp needle slowly moves over to the red and back to centre When sitting in traffic
There is coolant and no leak so what could be the possible culprit?
Any advice appreciated thanks

Sent from my SM-G925F using Tapatalk

Overheating could be a worn water pump.

I think there's sensors before and after the cat, if you check out realoem you should be able to identify it from that.


Sent from my iPhone using Tapatalk

Might change the pump also
Will see if it's OK
Needle acts a bit funny so it hard to gauge what's happening but for Google it seems to be a common. E39 issue

Sent from my SM-G925F using Tapatalk

If its going into the red in traffic only also check fan clutch, just had a look at the thread there and its a smashing looking car you have there. :)

So regarding the o2 sensor as I said In original post ita bank 1 before cat

So from looking on micks garage at bosch ones which would be oem quality I presume
There are 2 I narrowed it down to
The item description says
" in front of catalyst "

And the second one says " post cat"

I just want to be sure but it's the first one I need?
Car has four sensors

2 x 990mm length and 2 shorter ones
But I'm not sure from the real oem diagram which is before or after cat
Thanks


Sent from my SM-G925F using Tapatalk
[hr]
http://images.tapatalk-cdn.com/15/10...235aef2b06.jpgAttachment 5285[IMG][IMG][IMG][IMG][/IMG][/IMG][/IMG][/IMG]

Sent from my SM-G925F using Tapatalk

Quote:

---

Originally Posted by claudio

So regarding the o2 sensor as I said In original post ita bank 1 before cat

So from looking on micks garage at bosch ones which would be oem quality I presume
There are 2 I narrowed it down to
The item description says
" in front of catalyst "

And the second one says " post cat"

I just want to be sure but it's the first one I need?
Car has four sensors

2 x 990mm length and 2 shorter ones
But I'm not sure from the real oem diagram which is before or after cat
Thanks


Sent from my SM-G925F using Tapatalk
[hr]
http://images.tapatalk-cdn.com/15/10...235aef2b06.jpg

Sent from my SM-G925F using Tapatalk

---

Sent from my SM-G925F using Tapatalk

What ECU does your e39 have Siemens or Bosch?

Not sure have to see if real oem has some info on that

Sent from my SM-G925F using Tapatalk

Bosch Lambda, 85 euros to your door
http://www.ebay.co.uk/itm/0258003477-BOSCH-OXYGEN-SENSOR-LS3477-LAMBDA-SENSOR-BRAND-NEW-GENUINE-PART-/151656991718?fits=Car+Make%3ABMW|Cars+Type%3A525i&hash=item234f760be6:g:EV0AAOSwNSxVNoZk

In these sort of situations where you need a part, but not sure which exactly or what type, you go to realoem.com, enter your car details, go through diagrams, find a part you think you need to replace and get a part number. Then start searching for it.
So what part number is it? Or what year and engine is in your car?

Got sorted on mister auto for the exact part for 83 euro , need to shop around for these type of parts as prices vary so much for the same thing

Sent from my SM-G925F using Tapatalk