I already mansion about this matter before.My be some ppl not under stand about warranty.If someone buy the new haltech ECU from me and install under my certified,100% we give u a warranty and free repair if my mistake.If u buy from me and install with others and broken,short and what ever.U have to pay for freigh and repair.80% when im look about installation haltech,he never solder the wire..and mostly don't no to do Ignition set up proper.SO HOW TO GIVE A WARRANTY.Pls read properly the Haltech Manual book or Help section under Installation.If u say U are pro then me..pls come and see me.I wan to learn with u.I pay U for my learning