The Moroso coolant expansion tank made for 2016 and newer Mazda Miata MX-5 applications is a direct bolt-in replacement that restores overflow and recovery function with factory-style fitment. It provides a purpose-built reservoir for the MX-5 cooling circuit, simplifying installation while keeping coolant contained and easy to inspect during regular maintenance or performance tuning.
Moroso 16-Up Mazda Miata MX-5 Coolant Expansion Tank - Direct Bolt-In Replacement