
Originally Posted by
JapanABC
Actually there are two types of OEMs, TIER 1 OEMs are the big companies which are the ones registered suppliers to Toyota, Honda, Nissan, Mitsubishi and etc..., while TIER 2 OEMs are the small to medium companies which are not directly supplying to the car manufacturers but they are the sub-contractors or manufacturers that supply the products to the TIER 1 OEMs like STANLEY(Mainly supplies to HONDA), KOITO(Mainly supplies directly to TOYOTA) & ICHIKOH(Mainly supplies directly to NISSAN) (big three manufacturer of head lights, tail light assemblies) but the small bulbs like brake lights, signal light and headlight bulb are manufactured and supplied by a medium sized company like OIGAWA(HOPE for aftermarket) and other manufacturers which supplies the small bulbs to the big three companies.
Like DENSO is not manufacturing everything it is selling, for example the fuel delivery systems are manufactured by KYOSAN DENKI(Partly under Denso group) and AISAN Industries, KYOSAN and AISAN are a part TIER 2 OEM which supplies to DENSO TIER 1 OEM which supplies to TOYOTA and other car manufacturers. Mechanical Fuel Pumps, Fuel Filters, Fuel Injectors are made by Kyosan or Aisan.
If you want to know who is the OEM supplier of brake pads for American cars in USA you will be shocked, as it is not an American company.