Pulled an 0171 lean mixture fault.
Car starts, idles and pulls great. No lag or hesitation, outstanding gas milage, no excessive carbon or black smoke from the tail pipes.
Smoke tested but no vacuum leaks.
Cleaned fairly new (18/mo) MAP sensor.
My 02 sensor was in the yellow last year so I suspect that its probably due.
Anyone who has replaced theirs found a reasonably priced replacement with good results?
Any experience or input is very much appreciated.

EDIT: Although I still welcome any input - I've found a fairly/competitive reasonable price for a Genuine Mini 02 sensor from one of the contributing vendors here on NAM.
TIA

 

No MINI experience but with several Porsche cars I just had the original sensors replaced with sensors sourced from the factory, through the dealer parts department.

The factory sensors gave good service life -- but they are wear items when it comes right down to it -- and the replacement sensors were fine. In one car in over 317K miles I replaced the O2 sensors several times. The original factory sensors lasted to around 80K miles. Thereafter subsequent sets lasted 80K miles or more. With another car the original factory sensors lasted to 132K miles. (One sensor had a heater circuit fail and I replaced all 4 sensors.) I don't know how the replacement sensors fared as I sold the car at around 161K miles.

 

I am running these, with no issues, on my 05 R53. Yes they are the same for both.

 

Hey - Thanks for the feedback guys - and the link.
Funny - my Mini friend from the city said: "just buy the NTK or check RockAuto. No need to spend that kind of money on OEM. Your just gonna be replacing it every few years anyway and it's easy enough to do."...
I replied "Yes - but there's a lot to be said about 'once and done.' ". His response was (rather funny but true); "Really? - There aint no such thing as "once and done" on a Mini!" ()

This is the first and only car I've owned to have 02 sensors or emission control components (pre 80s'). I've known little about emissions related stuff up until recent years working on this car.

 

what kills me are some of the sensors you can get the OE replacement and some have to be OEM.