Showing specs for all NA & NB Miatas

Battery & starter

Battery restraint, starter attachments and starter B-terminal fasteners.

Use this checklist to track fasteners you handle. It is not a complete repair procedure or a verified disassembly order. Follow your factory manual for access, support, tightening sequences and inspections. Select your car and check each variant before using a value.

Checklist: https://miatatorque.com/jobs/battery-starter/
All NA & NB variants; select your car to narrow the list.

You’ll replace

No replacement list is recorded in these specs. Check the cited procedures for seals, gaskets and single-use hardware.

Fluids & settings

Fluid types, capacities and settings have not been catalogued for this job. Check your factory manual before filling or adjusting.

1. Battery restraint

Battery clamp bolt
NB 1999–2000 (BP-4W)
Factory manual79–121 in·lbin·lb8.9–13.7 N·m8.9–13.7 N·m79–121 in·lb
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 01–17–1Printed: “8.9–13.7 N·m {90–140 kgf·cm, 79–121 in·lbf}”
Battery hold-down fastener (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual79–121 in·lbin·lb8.9–13.7 N·m8.9–13.7 N·m79–121 in·lb
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 900Printed: “8.9—13.7 {90—140, 79—121} N·m {kgf·cm, in·lbf}”

2. Starter mounting and terminal

Starter mounting bolts
NA 1994–1997 (BP); NB 1999–2000 (BP-4W); NA 1990–1993 (B6)
Factory manual28–38 ft·lb38–51 N·m38–51 N·m28–38 ft·lb
  • 1990 Mazda MX-5 Miata Workshop Manual — Page J–45Printed: “37—52 (3.8—5.3, 27—38)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page G–22Printed: “38–51 {3.8–5.3, 28–38}”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 01–19–1Printed: “38–51 N·m {3.8–5.3 kgf·m, 28–38 ft·lbf}”
Starter B terminal nut
NA 1994–1997 (BP); NB 1999–2000 (BP-4W); NA 1990–1993 (B6)
Factory manual87–100 in·lbin·lb10–11 N·m10–11 N·m87–100 in·lb
  • 1990 Mazda MX-5 Miata Workshop Manual — Page G–24Printed: “10—12 N·m (105—120 cm-kg, 91—104 in-lb)”
  • 1994 Mazda MX-5 Miata Workshop Manual — Page G–22Printed: “10–11 N·m {100–120 kgf·cm, 87–100 in·lbf}”
  • 1999 Mazda MX-5 Miata Workshop Manual — Page 01–19–1Printed: “9.9–11.7 N·m {100–120 kgf·cm, 87–104 in·lbf}”
Starter bolt 3 (1994–97)
NA 1994–1997 (BP)
Factory manual12–16 ft·lb16–22 N·m16–22 N·m12–16 ft·lb
Notes
Callout 3 on the 1994 starter figure (G–22). The manual doesn't name it. The same procedure removes the starter bracket on MT cars.
  • 1994 Mazda MX-5 Miata Workshop Manual — Page G–22Printed: “16–22 {1.6–2.3, 12–16}”
Starter mounting bolts (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual28–38 ft·lb38–51 N·m38–51 N·m28–38 ft·lb
Notes
Temporarily install A; tighten B and C before final tightening of A.
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 922Printed: “38—51 N·m {3.8—5.3 kgf·m, 28—38 ft·lbf}”
Starter terminal B nut (NB2)
NB 2001–2005 (BP-Z3); NB 2004–2005 (BP-Z3-TURBO)
Factory manual87–104 in·lbin·lb9.9–11.7 N·m9.9–11.7 N·m87–104 in·lb
  • 2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture) — Page PDF p. 921Printed: “9.9—11.7 {100—120, 87—104} N·m {kgf·cm, in·lbf}”

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