Brand New Voltage Regulator Alternator Charging System For 1971-1978 Ford Mazda Dodge and PlymouthVoltage regulators control the charging voltage that the alternator outputs,generally keeping it between 13.5 and 14.5 V, to protect the electricalcomponents throughout the vehicle. When not replaced, the battery candischarge or over charge (causing battery damage), the engine will die, thecheck engine light will illuminate, or alternator damage may occur. AIPElectronics voltage regulators are designed to meet or exceed OEspecifications in form, fit and function to protect your electrical systems.Manufacturer: AIP Electronics100% New ConstructionHigh Quality OEM Replacement/OES PartFit and Quality GuaranteedReady for Install Straight out of the boxChannelSaleTech-specs018718391 025918391A 025918391B 045318391 25918391A 25918391B 88925031 D27Z10316A D4TG18391 MD001810 MD001811 MD001821 MD009080 36953200 36953201 36953300