Dad-of-two Gaffney suffered a broken collar-bone after being “catapulted” into the air when he was struck by the player’s Lamborghini.
He was treated in hospital before being allowed home while £230,000-a-week Fofana was breathalysed at the scene on the King’s Road in Chelsea, West London.
The French international centre-back, 23, passed the test and was allowed on his way as he was not deemed to be at fault for the accident.
Gaffney, 45, only found out Fofana was the driver later while sources said the player was “unaware” of the I’m A Celeb star’s identity.
A source said: “It was a nasty accident and Dean said afterwards that he was lucky to be alive and was counting his blessings.
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“He’d just left a nightspot and was trying to get in a black cab when the Lamborghini hit him in the midriff, catapulting him into the air.
“He was out cold and his mates were all really worried. The emergency services gave him pain relief and he was patched up in hospital.
“At the time, he did not realise who the driver was but was told later that it was Wesley Fofana. Dean’s a Brentford fan and joked about a star of a rival club taking out a well-known fan of their neighbours!”
The source said Gaffney, who played Robbie Jackson in BBC’s Eastenders, had never spoken about the December 2022 accident because there was “no blame attached” and it “was not anybody’s fault”.
A spokesman for Gaffney declined to comment.
Representatives for Chelsea FC and Fofana did not comment.