passed emission test in flying colors
so I thing O2 sensor should be fine

i have 1997 850 its 20 valve non turbo
and I think its take to much fuel
i cant go lower than 11L per 100km on HWY
everything looks ok
no check engine light,
new distributor cup
new rotor
new wire
pvc system done 15 000 km ago
new spark plugs
wheel alignment done
any clue?
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my 2 catalic empty inside what if I replace them with 2 aftermarket
magnaflow or just instal one dual inlet ?

I need to replace catalytic converter and O2 sensors former owner drove with out working O2 sensor I know to buy it from a dealer its a fortune any suggestion wich aftermarket cat. will work properly and let me pass emission? can I put 2 pipes in to one cat? witch O2 sensor should I buy? are those w...

they fixed shifting problem but message left (transmission service required)

I think work ok.
I just bought this car week ago previews owner told me that this tranny was rebuild 2 years ago but they never get rid of this worning.
he said they fix the problem was something with 3 gear

I have this massage 1999 Volvo s80 transmission service required
any idea what does it mean?
do I have to rebuild tranny ?
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Thank You
I will try to buy now one from Amazon acording to bosh specification.

I replaced first one,
So You mean I should buy it from a dealer?
Its like 314Doll. its crazy .
so I think if this is only solution I will drive witch engine light on .
that's sad .

I have code P0133
change O2 sensor bosh bought it on ebay new.
cant find any leak
I can drive around 80km light come, reset drive 80km light again
any idea what to do next?