Just had this convo with my SA. He said as long as they cant relate the problem you are attempting to service to the Aftermarket part then your fine. If they do find that the part caused or possibly cause the problem that only that area of the car is voided.
Ex: downpipes and 02 sensors going. 02 sensors would not be covered.
TiAg N54 xDrive M-Sport 6MT
2010 I:I N54 I:I CPO-2016
TMPS Sensor 09+ For Sale
x1 Seat Belt For Sale