Will NA (1990-97) factory hardtop side-window seals fit a Mazda Miata NB (1999-2005 US model years)?
Added · Updated
Short answer: Unclear Limited
Verdict:Unclear Limited confidence (1 of 3) · 5 sources
Unclear: The sources disagree, so buy the NB-specific seal if you can.
| Part | NA (1990-97) factory hardtop side-window seals |
|---|---|
| Part comes from | Mazda Miata NA (1990-1997) |
| Vehicle | Mazda Miata NB (1999-2005 US model years) |
| Years | 1999-2005 |
| Trim / condition | NA (1990-97) factory hardtop side seals on an NB car or NB top |
| Verdict | Unclear Unclear — details missing |
| Confidence | Limited 1 of 3 — Forum, Reddit or anecdotal report, or ambiguous/partial detail. Treat as a lead to research. |
| Last verified | 2026-10-26 (date the cited sources were last read) |
Details
The sources disagree, so buy the NB-specific seal if you can. Moss Miata lists the genuine Mazda side-window seals as 1990-1997 factory hardtop parts. Miata Depot sells separate left and right side seals for 1990-97 and 1999-2005. One owner on r/Miata found NA seals left a gap at the B-pillar corner on an NB (wind noise, some water) that NB seals closed. Treasure Coast Miata, though, sells one pair of OEM side-window seals (NA01-R1-891B left, NA01-R1-881B right) as fitting 1990-2005. The rear hardtop seal is listed by Moss as one genuine part for all 1990-2005 factory tops. Note: the DG Motorsports side-window and rear-deck seal kit sold for 1990-2005 tops is made for DG's fiberglass hardtops, not factory Mazda tops.
Specs
- position: left and right side-window surround seal on the factory hardtop
- sold: per side
Other body fitment for the NB
- NA (1990-97) factory hardtop — Fits with extra parts or work Fits with mods
- NB2 front bumper and headlights — Fits with extra parts or work Fits with mods
- NB factory hardtop — Reported to fit Fits
- Aftermarket (non-Mazda) NA/NB hardtop — Fits with extra parts or work Fits with mods
More for this car
- All Mazda Miata NB (1999-2005 US model years) fitment answers · NB common problems
- Guide: Miata NA/NB wheel fitment guide: bolt pattern, offsets, 15x8 sizes and brake clearance
- Guide: Miata NA/NB hardtop fitment guide: NA vs NB, OEM vs aftermarket, latches and seals
- Guide: Miata NA vs NB: differences, known problems and which parts swap
- Newsletter archive: past issues with every new and corrected entry
Sources
- Body Seals, 1990-1997 MX-5 Miata (genuine Mazda hardtop and soft-top seals) — Moss Miata (parts retailer) (vendor article; read 2026-10-26; full page read)
- Hardtop Rubber Seal Weatherstrip OEM Miata 1990-2005 — Miata Depot (parts retailer) (vendor article; read 2026-10-26; full page read)
- NA and NB Hardtop Weatherstripping are Different — r/Miata (owner photos and part numbers) (reddit; read 2026-10-22; search excerpt only)
- New OEM 1 Piece Side Window Seal for Hard Top, '90-'05 Miata — Treasure Coast Miata (new and used parts retailer) (vendor article; read 2026-10-26; full page read)Lists one OEM side-seal pair for 1990-2005: the conflicting source.
- Side Window (L/R) and Rear Deck Seals 1990-2005, DG Motorsports item 50-67-7124 (for DG fiberglass hardtops) — GoMiata (retailer listing of the DG Motorsports kit) (vendor article; read 2026-10-26; full page read)DG fiberglass-hardtop seal kit, for the last point.
Summaries are in our own words. Fitment is not guaranteed — disclaimer.
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