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Cross reference for Denso seat motors used by Toyota


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New here and have a 2011 Sienna Limited with a seat motor on the way out. P/N is 439440-10280, it's the 4 pin connector type for a memory seat. Toyota sells the frame + motor + whatever else they toss in for $700+ I can buy an entire used Limited seat for ~$500 

I have to imagine Toyota used this motor in more than 1 vehicle, any tips for how to cross reference that to other vehicles? FWIW, I have a 2010 RX350 also but that has a different setup

Haven't been able to find an aftermarket source for motors either, is that because one doesn't exist?

Thank in advance



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