Lambda sensors before cat question

[Sql_RS4]

I get fault codes from both lambda sensors before cat so I guess it is time to replace them. Also got some wrong fuel mix faults, car was in limp mode almost all the time, so I believe it is connected as I heard these probes are used to achieve appropriate mix, right?

And here is my question, I know part number is 078906265M but do I need to buy two items of this number?

I just checked catalogue pic and it looks like it is one element, consisting of 2 probes - or am I wrong?

Stealers want like 250 EUR so it really makes difference if I need to buy one or two.

Thanks in advance!

[Virdee Autos]

No you need to buy 2 of the 265M if you intened to change both front lambda sensors.