RX7 enthusiasts, listen up! Is your coolant warning light acting funny, or are you just doing a thorough refresh on your rotary engine? This is a genuine Mazda coolant level sensor, part number 8553-15-611 (supersedes 8553-15-610B). It fits all RX7 models from 1979 through the iconic FD of 1991. This little sensor sits in your overflow tank and tells your dashboard if the coolant level gets too low – super important for keeping that rotary engine cool and happy. It comes with a fresh gasket to ensure a perfect, leak-free seal. Brand new and made in Japan, just like the original. Swapping it is a straightforward job. Don't ignore cooling system warnings on these cars; a simple sensor replacement can help prevent big problems. Keep your classic sports car running strong and reliable!