BMW 120D 2018 Oxygen Sensor Fault

[talksr]

Just looking for some ideas on what would have caused this?

I had owned my used120d 2018 for three hours after collecting it from the BMW dealership and the emissions amber light came up on the car. It is all under warranty with BMW so not an issue in terms of me having to spend anything.

But the dealership got back to me today saying they have identified the fault and it was a faulty oxygen sensor.

Does anyone have any ideas on why on earth a part like this would fail so early on?
The car has only done 12k.
Just wondering if the previous owner has hammered it all the time, or if it is just a genuine worn part?

[RUSSELLM]

We’ve had them knackered from brand new.

They’re surprising delicate, for how they look.

[talksr]

RUSSELLM said:

We’ve had them knackered from brand new.

They’re surprising delicate, for how they look.

Ok well that is good to know.
Are they quite expensive? I don't know anything about the cost as it is being done under warranty.

[RUSSELLM]

I’ve never bought one, but there’s hundreds at work, and I’ve had to replace them from time to time.

It’s placed in such a way, that it’s a serviceable item. Look’s like thirty quid’s worth to me .... No doubt they cost a lot more.

Edited by RUSSELLM on Wednesday 5th June 14:35

[talksr]

RUSSELLM said:

I’ve never bought one, I’m in manufacturing, so there’s hundreds at work, and I’ve had to replace them from time to time.

It’s placed in such a way, that it’s a serviceable item. Look’s like thirty quid’s worth to me .... No doubt they cost a bit more.

Edited by RUSSELLM on Wednesday 5th June 14:33

Thank you. Just good to know once the warranty period expires as these are all things I may well end up having to pay for!

[gizlaroc]

I just did the pre and post cat o2 sensors on a b47 20d and they were £243.15 each, no one else apart from BMW had stock. Plenty advertised at £180 each or so, but no one has them.