New factory Mazda OEM manual transmission back up light switch for NA and NB Mazda Miata. This is the switch that is located on the transmission and activates the reverse lights when the transmission is put in reverse. Also known as the backup lamp switch or reverse switch. The crush washer gasket is not included except for with the 6 speed version but is sold separately. Part numbers M506-17-640A (90-97 5 speed), M507-17-640 (99-05 5 speed), and Y601-17-640 (6 speed). Fits 1990-2005. Choose between 90-97 5 speed, 99-05 5 speed or 99-05 6 speed.
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