i will Guaranteed it to be working when it arrives, how long it lasts is dependant upon the condition of your vehicle ! 

YOU AS THE BUYER are responsible for identifying and repairing the issue that caused yours to fail and to order the correct part number.    

NO RETURNS on burned up electrical items   !!!       you fry it you own it !!!  if that is unreasonable to you then do not buy my parts.  

PLEASE DO NOT ABUSE MY RETURN PRIVILEGE !!!  THIS UNIT MUST BE SYNCHED TO A REMOTE FOB, IT WILL NOT WORK UNTIL YOU SYNCH IT TO THE FOB !