Showing specs for all NA & NB Miatas

Front brake disc lateral runout limit

0.05 mm (0.002 in), maximum

Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Secure the rotor to the hub with all hub nuts tightened equally, using inverted nuts or the specified washers. Measure with a dial indicator 10 mm from the disc edge through one full rotation.

Applies to
  • NB 2001–2005 (BP-Z3) — Other years in this family inferred from 2005 factory evidence with owner approval; actual-year verification is separate.
  • NB 2004–2005 (BP-Z3-TURBO, 6MT) — Common 2005 front-brake inspection covers both rotor sizes. Diameter-specific limits apply only to the rotor diameter named in the record; 2004 is inferred.
  • Verified in: 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)
Sources
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)Tier 1
    Page PDF p. 1281
    Printed: “Runout limit 0.05 mm {0.002 in}”

Also in Additional factory manual gap audit