N52 post cat lamda

[bigwinn]

Hi all

Anyone changed the two post cat lamda sensors on the n52?

How hard is it to do? I’ve got the crows feet sockets but clearance looks ‘limited’

Cheers

Stuart

 

[ryushe]

When I did mine 1 1/2 months ago, I was able to do three out of four myself with a special sensor socket; both post cats where pretty easy without having to remove a lot besides the plate underneath the car, and the easy to reach pre cat. The lower, harder to reach one (bank 4-6 I think) I had done. Couldn't figure it out with the tools and space I had.

Summary: post cat lambda sensor replacement easy.

 

[j3nks79]

It’s easier if you unbolt the exhaust from the downpipe. Gives you a lot more space.
But depends how rusty the nuts are on the exhaust.

 

[bigwinn]

Cheers chaps

Makes sense

 

[Mike6]

They either come out easily or like mine have to be burnt out and manifold rethreaded. Impossible job on my car and local garage sorted it but I now get a code now and then suggesting air might be getting in around the sensor

 

[j3nks79]

They either come out easily or like mine have to be burnt out and manifold rethreaded. Impossible job on my car and local garage sorted it but I now get a code now and then suggesting air might be getting in around the sensor

Either that or the heat has destroyed the sensors

 

[Mike6]

I doubt it as sensors were new after old ones were burnt out.