Chip tuning box in BMW 5 Series Forum Posted March 21, 2020 Hi all i have a 2018 520d and was wondering if anyone has ever use a removable chip tuning box. Do they work, are they safe and are they untraceable. Any help would be most appreciated.
Chip tuning box
in BMW 5 Series Forum
Posted
Hi all
i have a 2018 520d and was wondering if anyone has ever use a removable chip tuning box. Do they work, are they safe and are they untraceable. Any help would be most appreciated.