IsItAGoodCar
Reliability Guide

Common Problems with the
1998 Mazda MX-5 (NA, late UK cars)

The final year of NA MX-5 production. These late cars are the most refined and reliable, though all NA MX-5s now need careful inspection for rust due to their age.

What changed for 1998

  • •Last year of first-generation production
  • •All mechanical improvements incorporated
  • •Strong used values reflecting collector status
  • •Rust-free examples becoming increasingly rare

Common MOT watch-outs

  • !Structural corrosion in UK climate
  • !Hood drain blockage causing sill rust
  • !Cooling system age-related failures
2
Known Issues
1
Serious
1
Moderate
0
Minor

All Known Issues

Rear Sill and Inner Arch Rust

SeriousBodywork & Rust

Late NA shells commonly rot around the rear sill sections ahead of the back wheels, often from the inside out after years of damp and blocked drains.

Est. Repair Cost: £500–£1,800
Warning Signs:

Bubbling paint ahead of rear wheels, Soft metal around sill ends, Previous patch repairs

What to Inspect:
  • Inspect behind the sill lip and rear arch edge
  • Check inside the cabin for damp
  • Read MOT history for corrosion patterns
Verified by IsItAGoodCar Research Team

Hood Drain and Rain-Rail Water Ingress

ModerateBodywork & Rust

Blocked drains or an ageing rain rail let water into the cabin and rear cavities, accelerating sill corrosion and leaving carpets damp.

Est. Repair Cost: £0–£350
Warning Signs:

Damp carpets, Musty smell, Water behind the seats after rain

What to Inspect:
  • Feel the carpets and rear shelf area
  • Ask when the drains were last cleared
  • Check for water marks behind the seats
Verified by IsItAGoodCar Research Team

Buying Tips for 1998 Mazda MX-5 (NA, late UK cars)

  • ✓Body condition matters more than spec; a rust-free import or heavily documented UK car is worth paying for.
  • ✓Check that the hood drains and rain rail are not letting water into the cabin or rear sill cavities.
  • ✓A healthy late 1.8 should feel eager and stable at temperature with no signs of cooling-system neglect.
1997
Check a 1998 Mazda MX-5 (NA, late UK cars) by Registration