RepairPal Certified shops can diagnose and repair your 2015 Nissan Altima. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Best thing to do -- check local shops near you first hand. RepairPal can give you an estimate and range, but nothing exactly like what a shop near you will actually charge to actually do the job. Consult some shops and compare.