OEM help

[rmoconnor41]

Morning
I have studied the OEM site but can’t see the rear O2 sensor on it.
Please could someone help with the genuine part number.
The vehicle sat in the rain for several weeks and then these codes appeared. Coincidence?

 

[t-tony]

Are you for the MAF (air mass sensor) or O2 sensor ?

Tony.

 

[Andyboy]

I have a pair of good M54 manifold 02 sensors from a 2002 Z3 2.2i.

 

[rmoconnor41]

Are you for the MAF (air mass sensor) or O2 sensor ?

Tony.

Hi
The MAF sensor was replaced about 2 years ago. Is the code indicating a failure (again). Previously the car wouldn’t keep running unless I unplugged it.
Looking at an O2 sensor

 

[t-tony]

Did you fit a genuine MAF or aftermarket?

Tony.

 

[rmoconnor41]

Did you fit a genuine MAF or aftermarket?

Tony.

After market chosen by BMW specialist

 

[rmoconnor41]

Did you fit a genuine MAF or aftermarket?

Tony.

 

[t-tony]

I don't recognise that brand personally, many people say with a MAF, however painful, its best to buy genuine or at least OEM. At 2 years old it could easily be the issue.
I can't connect standing in the rain with either fault tbh.

Tony.

 

[Andyboy]

Only two MAF's are guaranteed to work - OE (Bosch or Siemens) or febi which is the genuine thing with the logos ground off.

Anything else is a waste of time, including some 'known good brands' like Bremi etc.