When AC-12 go to the workshop, there are two black BMW 5-series estates - latest model G31. In a shot from behind the vehicles, the second of the two is shown as an older E61 BMW 5-series, before the original G31 appears again when they park up.
Carmichael states that Tommy Hunter was killed by his own organisation in 2014. This is wrong because the ambush actually happened in 2013 but the series wasn't released until 2014.