FRONTIER 11-13 w/AC, Crew Cab, S. Model: FRONTIER. XTERRA 11 (AC), X (Base), 3 knobs. XTERRA 13 (AC), X (Base). XTERRA 12 (AC), S, MT. XTERRA 12 (AC), X (Base), 4x2. carry a 6 month warranty. The 6 month period starts when you take possession of the part.
