Hi! There are original part suppliers to Toyota. The part is made basing on specifications by Toyota, but instead of using Toyota, manufacturers can choose to use their own brand names in the spare part market. As long as the part number and item are correct, they can be used.
For example, using a Bosch brake pads on a Toyota saloon, China-made air filter (with it own brand name) on a Toyota.
However, you must also be aware that there are parts made by back-lane shop using poor quality materials but packed as Toyota part. If you are using it, you are at risk too.
Importantly when shopping for genuine parts, go the the reputated companies!
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