Frequently Asked Questions

Why should I choose Koyo for my vehicle?

Koyorad offers 56 years of experience in the heat exchange industry and is renowned for manufacturing products of highest quality, performance, and fit-and-finish. Koyorad has earned this exceptional reputation through the company’s strict quality control measures. Initially, Koyorad was the leading manufacturer of OE aftermarket radiators in Japan. After 10 years, they reached the US shores and they now offer the same level of quality for US and Europe markets. Koyo radiators are manufactured to the stringent quality and performance tests required by the original equipment manufacturer, holding Koyo to a much higher standard. This makes Koyo the obvious choice for your vehicle for the best reliability.

Where are Koyorad radiators manufactured?

Koyo’s R&D departments complete engineering diagrams for each new application. These engineering drawings are then sent to their privately owned ISO-9001 certified factories. Each Koyo radiator is leak-tested a total of three times at different stages of the production process before the final visual inspection. The company’s attention to detail extends further to their rigid boxes, inlet/outlet/corner protection, assuring a Koyorad product arrives safely to the end user. Additionally, Koyo conducts “Koyo Training Exchange” programs between the Japan, Indonesia, and China plants that last from 3 months to a year and are focused on the workmanship experience of the employees. This program further ensures delivery of exceptional Japanese quality to the end user.

Koyorad actually owns its factories? How does this benefit me?

Koyo Japan maintains strict control over both R&D and production practices, from raw material selection to the end product. The company has never outsourced the radiator production to any other manufacturers.

What coolant or antifreeze does Koyo recommend?

It is important to use a proper coolant with your Koyorad radiator. Follow that exact coolant type/grade listed in your vehicle owner's manual for the best performance and longevity of Koyorad products. When a new Koyo radiator is installed, it is recommended to perform a complete cooling system flush and fill the system with new coolant. Neglecting a full cooling system flush or using the wrong coolant may result in corrosion, leaks, and premature wear and tear, not to mention other stresses on your engine's cooling system.

For your OE Aftermarket (Plastic Tank and Aluminum Core) Radiators I have noticed Made in Indonesia and Made in China Koyorad parts. Is there a difference?

There is no quality difference between the Indonesia and China made parts. Both are the OE-quality parts that Koyorad is renowned for. Each factory is privately owned and managed by the Koyorad Japan headquarters to ensure that Koyo's high quality standards are implemented in the production and testing processes.

Your competitors seem to sell the same parts at a lower price. Is there a reason Koyorad parts are priced higher?

Koyorad prides itself in having the reputation of producing the highest quality and most reliable parts within the cooling industry. While the competitors are known to cut costs by outsourcing radiator components to 3rd party companies, Koyorad is proud of keeping its vertically integrated production process and quality control fully in-house to ensure that all components, assembly, and testing meet the highest standards. Koyorad will never compromise on quality or reliability for the sake of selling parts at the lowest price.

Does Koyorad manufacture parts for European vehicles?

Koyorad has been offering OE aftermarket radiators for European vehicles in Asian and European markets for over 20 years. The company has plans of expanding the European vehicle coverage for the US market very soon.

What types of materials are used in Koyorad radiators?

Koyo Quality begins with their selection of premium OE grade materials such as: aluminum, copper, brass, and plastics. Koyo products are not only developed and tested to be resilient to harsh outside elements, but also years of under-hood heat cycling as well.