The former Red Devils winger believes the Inter Milan star would “strengthen” United’s midfield since the departure of Paul Scholes.
“He’s a very good player and would add quality to the midfield, and that’s the one department United need to strengthen,” Thomas told talkSPORT. “They’re strong everywhere else.
“It’s a lot of money and a lot of wages, but I think United need him. They’ve lost Paul Scholes, who was a fantastic player, and you have to have that quality.”
The Dutchman, who has been linked with the Premier League champions this summer, would reportedly earn £200,000 a week if he were to move to Old Trafford.
Thomas added: “Sneijder can pass the ball, has good technique and can strike a ball well from free kicks. He could be a danger.”
The 27-year-old has not ruled out a move away from the San Siro.