Replacing O2 sensors

[ussrdefiant]

Hey all,

I am a happy 1998 750iL owner. It already has 225k on the odo and have replaced the maf sensors. It seems fuel efficiency is going down a bit and apparently it is recommended to replace o2 sensors every 90k or so.

My question is do I need to reset something in the computer after replacing the sensors or is a " battery nap" sufficient. Or not neccesary all together.

I do not have inpa so would have to go to a dealer...

Thanks in advance

Sent from my GT-N7000 using BF.com

[justanewbie]

Hi

Ideally, would be good to reset adaptations after but not strictly necessary if you have no dash warning lights.

[psjr]

Hi

Ideally, would be good to reset adaptations after but not strictly necessary if you have no dash warning lights.

NO!
DO NOT reset adaptations on the V12.

[7thDimension]

NO!
DO NOT reset adaptations on the V12.

Why not?

[purplecty]

Because itll be expensive when it is fried... Never reset a v12

[BMWpower7]

I reset EML adaptation data on my 750, many times.

[driftshop]

^^ Really? I hear i fscks up the EML and you need a new one for 2k?

I'm thinking of getting an old one off EBay DE and trying it out.

Will I need to VIN code the EML if I install it?

IMHO, When I changed the oxy sensors, I just drove it as per normal. Don't expect much fuel economy improvement unless you're ones are totally gone.

[ussrdefiant]

There are no warning lights so it is more preventive maintenance. I would assume the computer adjusts to new sensors but resetting adaptations would make the change quicker...

Nobody ever preventivly replaces their oxygen sensors???

Sent from my GT-N7000 using BF.com

[driftshop]

I change them in my cars when fuel economy is no good. Some cars respond well, other's not so much.

E38 is a costly exercise to replace the oxygen sensor with genuine bosch items, around $400 for all 4 sensors if you go for an OEM bosch unit.

[IcemanBHE]

In with popcorn....

http://i795.photobucket.com/albums/yy233/IcemanBHE/BS/Pocorn.gif

[BMWpower7]

[QUOTE=driftshop;25437918]^^ Really? I hear i fscks up the EML and you need a new one for 2k?

I'm thinking of getting an old one off EBay DE and trying it out.

Will I need to VIN code the EML if I install it?

Yes, i do that with INPA, than i reset EML adaptation data at first time. the throttles was lost, they was non response for my leg than i was puting the gas pedal, engine was just idling and i got 2 errors in EML CONTROL MODULE, it has happened for you too?

[purplecty]

I wouldnt risk it. It'll relearn the new adaptations overtime...

[BMWpower7]

i relearn my throttles at least four times and it works fine. you no need to replace your EML control module!!!

[M I C H A E L]

Just replace 02's nothing else is needed.