Brake caliper wont extend the piston and it is brand new

Hello, if the brake system is bled of air - even the antilock brake system is bled of air, the master cylinder is bled of air - then the caliper should work properly, as long as the hose is mounted properly and there is no restriction of fluid in the system. I do not know the source or quality of the caliper; perhaps it is not working? I would double check air bleeding at all wheels and the master cylinder first, as well as the ABS system. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.