Mazda MX-5 Miata water leak issue on passenger side floor and trunk during rain, persists despite attempts to resolve on Mazda MX-5 Miata

Some Mazda MX-5 Miata owners report experiencing persistent water leaks on the passenger side floor and trunk during rain, despite efforts to fix the issue. Common causes identified include blocked rain ducts that allow water to seep into the passenger footwell, leaks from the windscreen cowl, and potential small leaks from the passenger bulkhead. Additionally, owners may find holes in the floor pan that enable water to slosh up, as well as issues with the tail lights and trunk seal that could permit water ingress. To effectively identify the source of the leak, some owners recommend pulling back the carpet and soaking the vehicle to trace the origin, or using baby powder to reveal water trails. Furthermore, a blocked A/C condensation drain may also contribute to the problem. If these measures do not resolve the issue, consulting a professional mechanic or Mazda dealership is advised.