The Argentinian has suffered two cruciate knee injuries already but despite revealing concerns over his fitness, Redknapp is keen to secure the playmaker's services.
A number of players have struggled to make a full recovery and re-establish themselves after successive knee injuries and the QPR boss cited Bolton's Stuart Holden as a recent unfortunate victim.
"I hope not, but look at Holden, the boy at Bolton - he's done his knee again," Redknapp said.
"He [Holden] had just come back. He'd been out now for about two years and he was a smashing player.
"It's very difficult, but hopefully Ale will come back fine - he's strong and a good lad with a good attitude. We'll wait and see."
Despite admitting his fitness fears, Redknapp revealed he is already in talks with chief executive Phil Beard over extending 27-year-old Faurlin's stay at Loftus Road.
"I spoke to Phil this week about giving him another contract," he added.
"We believe in him. He was playing fantastic before he got injured. If anyone will come back, he will."
Faurlin, who joined Rangers from Argentinian side Insituto in 2009, is out of contract come the end of the season.