The German was forced to pull over on the side of the track in the closing minutes of the evening session after reporting a gearbox failure on his SF16-H.
It is not the first time that Vettel has been sidelined with that kind of problem this year, but the four-time world champion says he was not using his race gearbox, so the issue will not result in a grid drop on Sunday.
“It’s not ideal obviously on a Friday but it shouldn’t have an impact,” the 29-year-old told TV crews after returning to the paddock.
“It was quite interesting to look at the other cars. Usually I’m quite happy if I don’t get the chance but today I think it was interesting even though it was only a couple of laps. I think we got most of the homework done so we should be happy.
“I think it was a better Friday for us, actually it was a very good Friday. [In FP1] on a hot track we struggled a bit, this evening things calmed down, the car calmed down. So it was actually quite good, I felt quite happy.
“On the long run I struggled a bit with the fronts early on, maybe I was a bit too aggressive, but overall the car felt good to be honest. I think we should have good pace.
“Hopefully tomorrow we have similar feeling in quali and put the car where it belongs and then we should have a good race.”