Despite problems Ferrari satisfied with KERS so far

Ferrari technical director Aldo Costa has said he is "satisfied" with the to-date performance of Formula One's new KERS system, although he fears that further troubles could lie ahead after problems in testing.

The team saw its running on the second day of this week's test session in Bahrain hit by a KERS failure that left Kimi Raikkonen parked in the garage for the best part of three hours.

Costa warned that the team could run into more problems with the new electrical system ahead of the season-opening Australian Grand Prix.

"We're coming close to the end of this long test session here in Bahrain and the days are more and more intense," he said.

"We have to exploit what the rules permit in terms of tests, as far as reliability, development and research in terms of performance are concerned.

"There might be some problems ahead, like the ones we've had over the two days with the completely new components of the KERS or with experiments, like the ones we had on the gearbox.

"As far as the KERS is concerned I have to say that we're quite satisfied with what we've seen so far, although there's still a lot of work to do." Yahoo! Sports