Sebastian Vettel has described the reliability problems that prevented him from clinching victory in Bahrain and Australia as "massively infuriating".

The young German qualified on pole position in the first two races and showed the best outright pace, leading the way in both races.

In Bahrain Vettel suffered a spark plug issue and had his race in Melbourne ruined by brake failure, a problem which he says was caused by an ill-fitting wheel.

"Well, we had a problem with the brakes of the left front tyre.

"As I understand it the tyre was not fixed properly and therefore had too much play and damaged the brake disc.

"It started two laps before - I wanted to pit but the next lap it was improving again so the decision was made to keep me out, and then it was too late.

"I was sort of flying sparks on the left front wheel - probably this was visible on TV - then I tried to brake cautiously.

"At one point the tyre locked and that was the end of it.

"It is massively infuriating and in my mind I'm using the 's' word."

With the Malaysian grand prix scheduled for this coming weekend, Vettel said he would like nothing more than to go home.

However, the Red Bull driver, whose 2009 title charge was also hampered by reliability issues with Renault's engines, said there is some comfort in knowing that he couldn't have prevented the issues from arising.

"It gives a certain satisfaction to know that from my side I couldn't have made anything different or better and I think until the moment when the trouble started we'd done a great job," said Vettel.

"That's a cold comfort. I would have rather left Melbourne with 50 points on my side instead of 12.

"We have a very fast car - that is a fact. We just have to make sure that we see the chequered flag.

"But it is only the second race so there is no need to get nervous. "We just have to see that we have a good car at hand for the second half of the season."