1992-2002 Mazda Rx7 FD3S coolant overflow tank (N3A1-15-350B)

Brand new Mazda Rx7 FD3S coolant reservoir

This unit sits at the bottom of your RH headlight. Collecting all overflown coolant when the engine is hot, after the engine is cooled off, the suction/vacuum will suck the coolant back into the system. 

As this bottle age the coolant usually starts leaking at the bottom. 

Replace it every 5 years is recommended. 

Part : N3A1-15-350B