Originally Posted by Spikey
warranty? well... if you have a piggyback type tune, leaving it in and/or having codes that indicate such tunes may make warranty claims related to drivetrain/engine etc a little harder if they're in plain sight.
The beauty of these piggyback tuning units is they can be installed and removed very quickly - in minutes - as all wiring connections are around the engine and the electronics box can be mounted almost anywhere safely under the hood.
So if you need to take the unit off for dealer servicing/warranty work, you can do so very easily, then replace it after you get your car back.
These 2 tunes don't 'mess' with the driving dynamics, they enhance it.
J1n, both are relatively mild tunes and they are not worrying at all.
Based on my experience with BMS, I will probably buy a JB, just not sure when.
328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect, JB4.