The 25-year-old defender joined Newcastle in 2013 and was on the books of the Magpies until 2017 when he moved to Young Boys on a permanent contract.
The Switzerland international did not have a great time at St. James’ Park, as the defender made only a handful of appearances the first team and had injury issues.
Mbabu had a period on loan at Rangers in 2015, and after a loan spell at Young Boys, he joined the Swiss club on a permanent contract.
The defender, who is now at Wolfsburg in the Bundesliga, failed to make a huge impact at Rangers, and he has now looked back on his spells at Ibrox and at Newcastle.
Mbabu told France Football about his time at Newcastle: “When you arrive at a mythical English club at the age of 17, you have stars in your eyes.
“I saw Ben Arfa, Cabaye and Sissoko, you are like a kid. What I hadn’t realised is that there was still a huge amount of work to be a first-team player.
“I remember that I had a great first game against Chelsea. I told myself ‘Woah, I’ve made it, it’ll go well’. One week later, I played against Manchester City and I injured myself.
“I said ‘Why me?’. My body wasn’t ready to continuously have such intensity. I took my time to become the physical beast I am today. There’s a lot of work.”
Mbabu told France Football about his time at Rangers: “Four of us arrived over there. The manager who brought us in resigned two weeks later for family reasons.
“A new manager came in with his ideas, and I never even made the bench. I was able to play a lot of games in a row for the reserves, though, and it had been a while since that had happened. I still left there with some positives.”
According to WhoScored, Mbabu has made 11 starts and two substitute appearances in the Bundesliga for Wolfsburg so far this season, scoring one goal and providing one assist in the process.
The 25-year-old has also made five appearances in the Europa League and has played twice in the DFB Pokal for the German club this campaign, according to WhoScored.