# Reverse idler gear to shaft radial clearance (Y16M-D 6MT)

Canonical URL: https://miatatorque.com/spec/y16m-reverse-idler-radial-clearance/

Applicability: NB 2001–2005 (BP-Z3, 6MT) — 2003 factory component-manual evidence; other years inferred within the 2001–2005 normally aspirated NB2 family. Does not infer MSM.

Confidence: fsm

Radial clearance
0.040–0.082 mm {0.0016–0.0032 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": "y16m-reverse-idler-radial-clearance",
  "name": "Reverse idler gear to shaft radial clearance (Y16M-D 6MT)",
  "aliases": [],
  "applies_to": [
    {
      "gen": "NB",
      "years": [
        2001,
        2005
      ],
      "engines": [
        "BP-Z3"
      ],
      "trans": [
        "6MT"
      ],
      "note": "2003 factory component-manual evidence; other years inferred within the 2001–2005 normally aspirated NB2 family. Does not infer MSM."
    }
  ],
  "kind": "non-torque",
  "value_text": "Radial clearance\n0.040–0.082 mm {0.0016–0.0032 in}",
  "procedure": {
    "notes": "Secure the reverse idler gear and shaft in a vise and measure radial clearance with a dial gauge. Replace both parts if outside the range. Normally aspirated NB2 6MT only; actual 2003 evidence, other 2001–2005 years inferred."
  },
  "confidence": "fsm",
  "sources": [
    {
      "source": "workshop-y16m-d-2003",
      "page": "05–11–13 (PDF p. 26); 05–50–1 (PDF p. 46)",
      "as_printed": "Radial clearance\n0.040—0.082 mm {0.0016—0.0032 in}",
      "verified_years": [
        2003,
        2003
      ],
      "document": {
        "id": "workshop-y16m-d-2003",
        "tier": 1,
        "title": "Mazda Y16M-D Manual Transmission Workshop Manual, March 2003",
        "part_number": "9999-95-T15M-D",
        "covers": [
          {
            "gen": "NB",
            "years": [
              2003,
              2003
            ],
            "engines": [
              "BP-Z3"
            ],
            "trans": [
              "6MT"
            ]
          }
        ]
      }
    }
  ],
  "jobs": [],
  "system": "transmission",
  "component": "inventory-pass-2026-10",
  "componentName": "Service measurements and fasteners",
  "sequence_diagrams": [],
  "url": "https://miatatorque.com/spec/y16m-reverse-idler-radial-clearance/"
}
```