wrong lambda??

[A80Avant]

i have bought a lambda sensor from the ebay from a certain dealer that was said to be good,and after mentioning the make of the car and the audi part number he sent me this lambda sensor!!! Is it usable on the RS2 or should i send it back??

also bosch part number lambda:0258003957(which im using now) is also different than the part number on the lambda i bought from audi dealer(seen on the picture)

[pixsaudisex2]

the top one is the same as the one on my s2... is it the top or bottom one he sent you..

[A80Avant]

it is the bottom one.
the answer i got is that this is a universal unit and it does the job.However it came without the plugs and it is not wise to make cables of the lambda unit,because the signal changes.Also i have bought a universal unit before and it didnt work....
i hope i can either get my money back,or get them to send me the right lambda

[Audi Parts Guru]

The bottom one is fitted to many Alfa Romeo's