Part Type: A/C Accumulator. 1986 Buick Century Submodel: Custom; Engine: 3.8L V6; EngineCode: LN3; EngineVIN: 3; FuelSystem: FI; MFI; Electronic; OE Style;. 1986 Buick Century Submodel: Estate Wagon; Engine: 3.8L V6; EngineCode: LN3; EngineVIN: 3; FuelSystem: FI; MFI; Electronic; OE Style;.