The collision took place at Turn 4 during Lap 1 of the Spanish Grand Prix last weekend. The Danish driver came in contact with Lewis Hamilton as he tried to overtake around the outside for P6.
Directly after the incident, it could be heard on the team radio that Magnussen blamed Hamilton, saying the Brit intentionally opened up his steering.
But his allegations changed, after he later clarified that the remarks were made in the heat of the moment. He watched the incident days after the race, which made him state that he believed the Mercedes driver was innocent.
Magnussen said he now thinks it was just unlucky circumstance that caused the clash, and in retrospect he wished he had left more space between both of them.
Ahead of the Monaco Grand Prix, the Haas driver spoke about the topic: "I had a chance to look at it and of course I changed my view on that.
“I had the feeling when I was on the track that he opened the steering. But that's not what happened. He just got in the slipstream of the Ferrari and understeered a tiny bit.
"I was super close to him. I didn't give him much room for error, I gave no margin. So, we touched. It was unfortunate."
The Dane also said that he had no regrets about attempting a lap one pass like that one, but his regret is in his trajectory not bit slightly different.
"I just wish I had turned in one millisecond later," said the Haas driver. "But also in a corner like that, if you're going to go around the outside, you want to be as close to him as possible. You don't want to go too wide and go on to the dirty part of the track. That's what I did.
"We touched unfortunately. There was also a lot of bad luck in that. If I had just been a little bit further forward when we hit, we would have hit rim to rim and it would have been different.
"But unfortunately I just hit with his side at the tyre and it was a puncture. It was bad luck. I wish I had given him slightly more room."