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Just wanted to give an alternative to all this as everyone seems to have skipped the seemingly obvious path to fixing drivability issues with their £60k+ RRP car..
Recently had my 67 plate M4 CP updated by BMW to latest stock software and it has completely changed the car in many of the ways described in the thread so far regarding GTS software
(They also replaced the carbon prop shaft and parts of the diff under warranty since they were bad/broken)
Car was awful before -
Jerking/kangarooing in 1st gear
Slamming gears in when changing up - to the point of throwing the back end out sometimes
Lazy going 1st to reverse and back again
Jerky/snatchy setting off slowly when parking
Awful setting off quickly from standstill
All of this has been sorted by the software update and prop/diff being fixed
That being said I am still tempted by GTS updates, but firstly - don't just assume problems are down to software when so many of these cars have diff and propshaft issues and years worth of software updates waiting, and don't assume you need to pay someone for special software when BMW might be able to sort it for you for free
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