Well the parts new so iyt cant be faulty.
Never trust to a part simply because its new you are in for a big surprise
Stop start driving causes fuel injectors to block or partially block.various in tanl cleaners are out there but the only method is removal and untrasonic cleaning
be wary of the fine detail of a vehicles warranty. X number of years or whatever miles really means nothing.If you do have a failure outside the period then its a question of customer is right or a gesture of goodwill on the part of the company to sort it out
Lunar auto diagnostics