Ferrari driver Sebastian Vettel says it is his own fault he didn't qualify higher than sixth for the British Grand Prix, adding the gearbox issues experienced so far this weekend are a "high priority".

Vettel made errors on both his runs in the top-ten shootout and with a five-place grid penalty to serve, following another gearbox failure in final practice, it means the German will line-up in a lowly 11th.

"For sure I was on a good lap on the first one, the first attempt [in Q3] and then obviously I lost the rear in Stowe. I was able to catch it but the majority of the lap time was lost," he recalled.

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"Then on the second approach I started similar to the first, but I just went in a little too deep and wide in Turn 1 and then it was difficult to recover from there. So, I didn't have good laps in qualifying when it mattered. I think the pace was actually okay and we were able to split the Red Bulls, but we didn't in the end. That's a shame."

Meanwhile, Vettel confirmed the gearbox problem in final practice was the same as that which occurred on Friday.

"We need to understand [it] because we had the same failure yesterday and this morning. We need to have a look," he stated.

Asked if it could be a problem in the race, he replied: "I think we took some precautions coming into qualifying and we didn't have the failure in qualifying. We didn't see the failure on Kimi's car [either]. I am fairly confident it will be fine tomorrow but we did get caught out twice with the same problem."

"Yeah, we didn't have it before [coming here], so it might be something related to the track," he added.

"It happened also in the same place, the beginning or end of the lap onto the main straight. We need to have a look and really understand what happened. Rest assured we are looking into that and it is a very high priority because it cost us five positions today. It is something we need to fix, plus if it happens in the race you don't finish."