Answers: Nipondenso
Nipendenso or bosch
I replaced all 3 on my 94 Camry a couple of years ago. I used bosch and they work freshly fine, I would not be surprised if toyota did not buy from them and add the toyota signature. That way they can charge a small fortune for them.
Denso
All Japanese innovative brands espacially in 80's and 90 even in a minute are all Nippondenso "DENSO" . Not Bosch Bosh is a german company . DENSO/Nippondenso is youd read aloud Japans electrical and electronics controls company. Now with plugs it will be DENSO or NGK depending on its plant and facility location.
toyota
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