This won't be listed on the Estimator tool, I don't think..
You'll have to get some local real world estimates from repair facilities near you.
www.repairpal.com/repair-shops
Use that link to find shops near you.
RepairPal Certified shops can diagnose and repair your 2013 BMW 128i. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.