I know this question has been asked aces times but I'm thinking about getting a 'box' to boost the performance of my 520d. The 525 / 530 where out of the question in terms of cost for me and the performance of the 2 liter isn't terrible but I've heard the these chips are reliable and work well without damaging the cars. A remap is out if the question as I don't want to invalidate the warranty.
Does anyone have any experience of them? I'm thinking the DTUK one which alters boost as sell as fuel. It's the CRD -T which a 2 channel system. I'd just remove it prior to servicing just in case. Insurance company aren't asking for any more on the premium either. Not to everyone's tastes I suppose but thought worth asking on here?
F11 520D M Sport (Power Kit)