I had the Chassis malfunction pop-up while I was driving in the mountains on my way back to Chicago from PCD and the car was brand new with no Dinan S2. Car didn't feel any different except it was locked to comfort mode. Turning off the car and restarting it would make it disappear until any sudden movement such as hard acceleration or fast turns. Got home and went to the dealership and service adviser said my power steering fluid was low. The fluids got topped off and I have not had any problems since then.
12 550i xDrive (Dinan S4, Intercoolers, Exhaust, Springs/Shockware, Negative Camber/Low Compliance Rear Control Arms & intake on order; 3M CR40; AG M355, Michelin PSS & Tikore Ti Lugs) - Alpine White, Beige, M Sport, Cold Weather, Premium Sound, ARS, Sport Auto, Power Shades, Side/Top Cameras, HUD & BMW Apps.
13 Infiniti JX35 AWD - Midnight Garnet, Deluxe Touring, Technology, Theater & Premium Packages.
07 E60 550i Dinan S2 & Intake (Gone)
09 Hyundai Genesis 4.6 (Gone).