The four-time F1 world champion Vettel switched to Aston Martin after leaving Ferrari for 2021, but was unable to collect any points in his first two races.
Vettel dropped out on his Q1 debut for Aston Martin in Bahrain, finishing 15th and qualifying 13th at Imola before retiring late due to a transmission problem.
The German driver was outqualified in both races by his teammate Lance Stroll and has spoken about his need to take the time to get up to speed with the AMR21 car and build his confidence.
Aston Martin team boss Szafnauer said Vettel struggled with instability at the rear of the corner at the entrance to the curve because he had not found enough consistency with the car.
“It’s a little bit here in particular [of] Having instability back into the corner, but I think the biggest difficulty is the variability in it, ”said Szafnauer.
“So if it does the same thing over and over again, then you can go to the limit and stay there and drive a little faster.
“But if it’s variable and you don’t know what to expect, I think that’s the problem.
“The more you drive a car, the more you feel it or with it, the more you can predict such things. It’s just a question of how long you sit. “
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Aston Martin was vocal about its struggles at the start of the season due to the rule changes for 2021 that reduced downforce.
Szafnauer felt that Vettel’s lack of confidence was due to the lost downforce for 2021, but that upcoming upgrades would try to fix that.
“This cure will come from doing a lot of good work in the wind tunnel and just bringing in new parts of the car in the next races to get some of the load back that we lost at the rear,” said Szafnauer.
“That’s exactly where it comes from.
“There is a way. For example, you will see some improvements in the next race, and there will be some other upgrades after that too.
“So it won’t be the last.”
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