NSA's brand new units are manufactured in QS-9000 CERTIFIED facilities. All NSA units meet OE performance specifications and all of the components are 100% new. Every unit is tested by a computerized machine. Moreover, NSA starters pass the 10,000 starting cycle test, and NSA alternators pass the 1,000 hour durability test. The strict quality control standards implemented into every part of the manufacturing system at our manufacturer's factory is the best way to guarantee the highest quality products.