Castle Mitsubishi, a full-line Mitsubishi Dealership in Portage Indiana with New Mitsubishi Cars & SUVs. Serving the Northwest Indiana and Chicagoland Communities. Castle Used & Certified Pre-Owned Vehicles – Inventory of ALL makes & models. Mitsubishi Certified Service Center, Auto Repair & Car Maintenance Facility – Batteries, Brakes, Oil Change, Alignment, Tires & Engine Repair. Castle Credit Center (Located inside Castle Mitsubishi) – Providing auto financing for those with bad credit, bankruptcies, & previous repossessions. Castle Car Buying Center (Located inside Castle Mitsubishi) – Castle Buying Center will buy your vehicle even if you don't buy ours, get an offer in minutes online or schedule an in-person visit.