# Accessory drive belt deflection — new belt (NA6)

Canonical URL: https://miatatorque.com/spec/accessory-drive-belt-deflection-new-na6/

Applicability: NA 1990–1993 (B6) — Other years inferred from 1990 factory evidence.

Confidence: fsm

8.0–9.0 (0.31–0.35) mm (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": "accessory-drive-belt-deflection-new-na6",
  "name": "Accessory drive belt deflection — new belt (NA6)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NA",
      "years": [
        1990,
        1993
      ],
      "engines": [
        "B6"
      ],
      "note": "Other years inferred from 1990 factory evidence."
    }
  ],
  "kind": "non-torque",
  "value_text": "8.0–9.0 (0.31–0.35) mm (in)",
  "procedure": {
    "notes": "Alternator, power-steering, combined P/S+A/C, and A/C-only belts. Apply 98 N (10 kg, 22 lb) midway between pulleys. For a new belt set deflection at the midpoint of the new-belt specification."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "fsm-1990",
      "page": "B–6 (PDF p. 33)",
      "as_printed": "8.0—9.0 (0.31—0.35) mm (in)",
      "verified_years": [
        1990,
        1990
      ],
      "document": {
        "id": "fsm-1990",
        "tier": 1,
        "title": "1990 Mazda MX-5 Miata Workshop Manual",
        "part_number": "1193-10-89C",
        "covers": [
          {
            "gen": "NA",
            "years": [
              1990,
              1990
            ],
            "engines": [
              "B6"
            ]
          }
        ],
        "url": "https://archive.org/details/1990-mazda-mx-5-miata-workshop-manual_202411"
      }
    }
  ],
  "jobs": [],
  "system": "engine",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/accessory-drive-belt-deflection-new-na6/"
}
```