[cfv265]

Hello all,
I'm preparing to do some DIY work on my 2012 Audi A5 Quattro 2.0.
I just want to be 100 percent certain before I proceed. Seems pretty straightforward.
The two O2 sensors I plan on replacing.
Can you verify the right BOSCH part numbers for Upstream and Downstream and that the locations I have marked in the photo are indeed correct?

Thanks so much!

 

[DrGER]

Upstream: VAG 1K0998262L (list $308); Bosch 0258017178
Downstream: VAG 1K0998262T (list $250); Bosch 16002

 

[findalex]

Seems a little early for needing new O2 sensors. At those prices, are you certain they're the problem?

I had a inefficient catalytic converter error (check engine light) show up 2 weeks ago. The diag process mentioned a potentially bad O2 sensor. You can use VCDS to do real time monitoring of the sensor readings... but I was lazy and just put in a bottle of Gumout Regane fuel system cleaner. The code never came back.