NA/NBSeller listing
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View listing at Mike's Miata Parts; opens in a new tabMiata · Buyer's guide
NA/NB Miata Control-Arm Bushings and Eccentric Alignment Hardware
1990-2005 NA/NB Miata control arms and factory eccentric alignment hardware. Full arm, rubber/poly bushing and race alignment-lock choices have different scope.
Current seller options
WHERE TO BUY
Open an exact listing, then confirm fitment, stock, price, and shipping with the seller before ordering.
Seller links checked . Prices and availability can change.
NA/NBSeller listing
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View listing at Good WIN Racing; opens in a new tabNA/NBSeller listing
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View listing at Powerflexusa; opens in a new tabNA/NBSeller listing
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View listing at Trackprepperformance; opens in a new tabNA/NBSeller listing
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View listing at Flyin' Miata; opens in a new tabWhat you need to know
Inspect arm straightness, ball joint, every bushing position, seized long bolts and subframe cam surfaces. Tighten bonded rubber at ride height and perform a full alignment after work.
OEM numbers
Checked improved eccentric hardware NA80-28-66ZD bolt, NA80-28-473A washer and B001-39-037B nut. Mazda Motorsports lists separate stock and competition bushing families by arm position.Supersession
The improved NB-style eccentric hardware is documented as compatible with NA/NB; it does not supersede every control arm or bushing. Position-specific bushing numbers remain separate.
Fitment
Inspect arm straightness, ball joint, every bushing position, seized long bolts and subframe cam surfaces. Tighten bonded rubber at ride height and perform a full alignment after work.
Aftermarket options
OEM stock/competition rubber, Powerflex poly, complete arms and eccentric lock kits are distinct choices with NVH/alignment tradeoffs.
Before you buy
Identify each bushing position and inspect arms/subframe before ordering. Seized hardware may require cutting and additional parts. Bonded rubber must be torqued at ride height, followed by alignment.
Research and fitment sources
Supersede reviewed 7 unique research sources for this guide. 5 also appear above as a seller or official action and are not repeated here; 2 additional citations follow.
Research last verified .