# Spark plug gap (Mazdaspeed)

Canonical URL: https://miatatorque.com/spec/spark-plug-gap-msm/

Applicability: NB 2004–2005 (BP-Z3-TURBO, 6MT) — 2004 applicability inferred from 2005 BP WITH TC factory evidence within the owner-approved MSM family.

Confidence: fsm

0.7–0.8 mm (0.028–0.031 in)

Always confirm against your factory manual. Match every restriction and follow all stages and procedure notes. Disputed claims must not be automatically resolved. The complete record below preserves every printed unit, source claim and procedure.

```json
{
  "id": "spark-plug-gap-msm",
  "name": "Spark plug gap (Mazdaspeed)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NB",
      "years": [
        2004,
        2005
      ],
      "engines": [
        "BP-Z3-TURBO"
      ],
      "trans": [
        "6MT"
      ],
      "note": "2004 applicability inferred from 2005 BP WITH TC factory evidence within the owner-approved MSM family."
    }
  ],
  "kind": "non-torque",
  "value_text": "0.7–0.8 mm (0.028–0.031 in)",
  "procedure": {
    "notes": "Use a wire-type gap gauge; do not adjust the gap. Replace the spark plug if outside specification. Do not clean with a wire brush."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-2005",
      "page": "PDF p. 916",
      "as_printed": "Standard plug gap\n0.7—0.8 mm {0.028—0.031 in}",
      "verified_years": [
        2005,
        2005
      ],
      "document": {
        "id": "fsm-2005",
        "tier": 1,
        "title": "2005 Mazda MX-5 Miata Workshop Manual (electronic manual capture)",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2005,
              2005
            ],
            "engines": [
              "BP-Z3"
            ]
          },
          {
            "gen": "NB",
            "years": [
              2005,
              2005
            ],
            "engines": [
              "BP-Z3-TURBO"
            ],
            "trans": [
              "6MT"
            ]
          }
        ]
      }
    }
  ],
  "jobs": [],
  "system": "ignition-electrical",
  "component": "gap-followup-2026-10",
  "componentName": "Additional factory manual gap audit",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/spark-plug-gap-msm/"
}
```