Lewis Hamilton is demanding answers after another engine failure at the Malaysia Grand Prix.

The three-time world champion had a number of issues with his Mercedes power unit at the start of the year, leading to him taking a number of penalties at the Belgian Grand Prix in order to build a stockpile of spare engines.

However, a new engine was fitted to his car prior to third practice in Malaysia but it expired on lap 41 of the race.

Of the eight Mercedes-engined runners in the Malaysia Grand Prix, Hamilton was the only one to suffer a problem with his power unit and now the Brit is asking questions as to why it is him suffering the most.

I just can't believe that it's only been my engines that have been blowing... something's not right," he said. "My question is to Mercedes. Someone need to give me some answers because this is not acceptable."

"I've just got to move on. The guys did a fantastic job this weekend, we did everything we could. I did everything I could," he added. "I just can't believe that there's eight Mercedes cars and only my engines that have been going this year. Something just doesn't feel right. There's nothing I can do about it."

"It's a brand new engine. I've done one race with it. I did P3 with it and qualifying, it's a brand new engine out of the new three that I had."