Power module is one of the most important modules for automotive safety-critical electronic systems (ASCES) such as electronic steering and braking system. The paper proposes vehicle redundant power (RP) and focuses on improving the safety and reliability of power module for redundant ASCES (RASCES). The proposed vehicle RP adopts isolated strong and weak power based on redundancy theory, which not only has the ability of failure tolerance, but also provides clean and stable electricity to RASCES controllers. Analyzing the safety and reliability of vehicle RP using Fault Tree Analysis method, the failure rate can meet the automotive safety integrity level (ASIL) D random hardware failure target value demand in automotive functional safety standard ISO26262. Failure injection test results show vehicle RP can reach “failure/operation/warning” high safety and reliability.