← Mazda Miata NB (1999-2005 US model years) problems

Rust (front side members, East Coast cars)

Reported · Severity: Medium · Years: 1999-2005

Symptoms

Corrosion in structural areas.

Cause

R&T says East Coast cars should be checked for rust; a UK forum poster reported double-skin front side-members rusting badly.

Fix (summary)

Inspect underbody and front side-members when buying.

Sources

• Everything You Need to Know Before Buying a Second-Gen Mazda Miata — Road & Track (Jun 2016) (editorial; read 2026-10-15; full page read)
• Common Issues with NB 1998-2005 Miatas — MX-5 Miata Forum (forum thread; read 2026-10-15; search excerpt only)

Summaries are in our own words. Not repair instructions; consult the factory service manual.