Chassis Code Explained
| Segment | Meaning | Detail |
|---|---|---|
| N | Model series | N — Roadster/MX-5 series designation |
| A | Generation | A — first generation (1989–1997) |
The NA generation is the Eunos Roadster in JDM form (1989–1996); the Mazda Roadster name was used domestically from 1996. Pop-up headlamps and the 1.6L B6-ZE / 1.8L BP engines distinguish this generation.
Editorial notes
Key Takeaways
The Roadster has run through four generations since 1989 and the recipe hasn't really changed. Small, light, front engine, rear wheel drive, two seats, soft top. The NA is the pop-up headlight original. The NB is the most varied by trim. The NC is the heaviest and the most underrated. The ND is current production and brings the weight back down to where it started.
- Same car: Eunos Roadster (JDM), Mazda Roadster (JDM post-NB), MX-5 / Miata (export)
- Four generations: NA 1989-1997, NB 1998-2005, NC 2005-2015, ND 2015-present
- Lightweight FR: roughly 2,300 lb with near-50:50 weight distribution
- Engines: 1.6L B6, 1.8L BP, 2.0L MZR, 1.5L and 2.0L SkyActiv-G across the four generations
- JDM-only specials: V-Special, S-Limited, Mazdaspeed MX-5, MX-5 SP, Club Sport, NR-A
- Power range: ~100-200 hp across the run; only a few Mazdaspeed NB cars were factory-turbocharged
- Engine-swap friendly: chassis tolerates LS, 13B, and other swaps with significant supporting work
Technical Specifications
Every Roadster runs a naturally aspirated four cylinder. The NA uses the 1.6 liter B6 and later the 1.8 liter BP. The NB keeps the BP family and adds two factory turbo specials, the Mazdaspeed MX-5 and the MX-5 SP. The NC moves to the MZR 1.8 and 2.0. The ND runs SkyActiv-G 1.5 and 2.0. The manual gearbox is the right gearbox in every generation.
Engine Options
| Chassis | Engine | Displacement | Power — JDM | Notes |
|---|---|---|---|---|
| NA | B6-ZE | 1.6L | ~110-115 hp (per WP body) | 1989-1993 early NA; DOHC 16V four; smaller intake and exhaust |
| NA | BP | 1.8L | Up to ~160 hp (per WP body) | 1994-1997 later NA; Mazdaspeed supercharged variant noted in WP body; 2.0L stroker offered by Mazdaspeed (per WP) |
Transmission Options
| Type | Ratios | Availability | Notes |
|---|---|---|---|
| 5-speed manual | Not cited in WP source | NA and NB standard; NC base | Standard transmission across NA/NB; NC base spec |
| 6-speed manual | Not cited in WP source | NB special editions (10th Anniversary, Mazdaspeed, MX-5 SP); NC optional; ND | Per WP: 6-speed manual was special-edition only on NB |
| 4-speed automatic | Not cited in WP source | NA and NB optional | Older automatic offered alongside 5MT |
| 6-speed automatic with paddle shifters | Not cited in WP source | NB special spec onward; NC option | WP body cites paddle-shifter 6-speed auto added on NB |
Livability
- Headroom
- Limited with the top up; comfortable with top down
- Driver and passenger seating only; cabin is small by design (per WP body)
- Rear Seats
- None
- Two-seat configuration across all four generations
- Cargo
- Small trunk; varies slightly by generation
- WP body notes the Roadster is not a grocery-run car with a passenger aboard
This chassis became eligible for US import under the 25-year rule in 2014. Calculate import costs →
Variants & Trims
JDM Roadsters got special editions the export Miata never saw. The NA gave you V-Special, S-Limited, and M-Edition with tan interiors and BBS wheels on some cars. The NB is where it gets interesting with the 10th Anniversary, the Mazdaspeed MX-5, the 100 unit MX-5 SP, and the 50 unit Club Sport. If you can find a documented one, that's the Roadster to buy.
| Generation | Trim | Engine | Key Features |
|---|---|---|---|
| NA (1989-1997) | Eunos Roadster 1.6 (early NA) | 1.6L B6-ZE NA | 5-speed manual or 4-speed automatic, pop-up headlights, soft top |
| NA (1989-1997) | Eunos Roadster 1.8 (later NA) | 1.8L BP NA | 5-speed manual or 4-speed automatic, more torque, soft top or hardtop |
| NA (1989-1997) | JDM special editions (V-Special, S-Limited, M-Edition) | 1.6L B6-ZE / 1.8L BP | JDM-only colour/trim packages; tan interiors and BBS wheels on some V-Special cars |
Should You Buy a Mazda Roadster (Eunos Roadster / MX-5) NA?
The Roadster gives you a lot for not much money and asks for very little back. It's cheap to buy, cheap to run, and easy to work on. What you give up is space, big factory power, and any real weather protection. That trade has been the same Roadster trade since 1989.
Why You'll Love It
- Affordable entry Eunos Roadster / Miata listings start under $5,000 with fixer-uppers under $2,000 (per WP body)
- Low maintenance and running cost Simple build quality; fluid changes and routine maintenance are owner-doable (per WP)
- High reliability WP body cites a 4.0 reliability rating; routine care supports several hundred thousand miles
- Fun to drive ~2,300 lb curb weight and near-50:50 weight distribution; engaging at any speed (per WP)
- Pop-up headlights (NA only) Distinctive NA-generation styling feature; eliminated on NB onward per pedestrian-safety regulations (per WP)
- Project-car friendly Engine bay accepts a wide range of swaps; aftermarket support is broad (per WP)
Why You Might Not
- Small cabin and trunk Two-seat layout limits cargo and passengers (per WP body)
- Firm ride over rough pavement Short wheelbase and low weight transmit road imperfections (per WP)
- Rust-prone on early cars NA and early NB subframes, sills, and frame rails are common rust locations (per WP)
- Soft top maintenance Vinyl tops crack with UV exposure and require replacement (per WP)
- Limited stock power Naturally aspirated 1.6L and 1.8L engines hold roughly 250 hp ceiling on stock internals before bottom-end work is required (per WP)
Who Should NOT Buy This
- Anyone needing rear seats or family-hauler cargo capacity
- Buyers with no garage; soft tops degrade under direct sun
- People expecting modern infotainment on NA or NB cars
- Owners who can't tolerate cabin noise and a firm ride
- Drivers wanting big factory power without modification
- Buyers who can't budget for soft-top replacement or rust repair on older imports
- Anyone planning to carry more than one passenger regularly
Common Issues & Solutions
The Roadster is a reliable car. Most of what goes wrong is age, not Mazda. Rust hits the sills and frame rails on NA and early NB cars. The soft top vinyl cracks in the sun. The pop-up headlight wiring fails on NAs. And the 1989 to 1992 cars have an early B6 crankshaft that needs to have been replaced by now. None of these are deal breakers if the paperwork shows the work was done.
| Issue | Cause | Solution | Est. Cost |
|---|---|---|---|
| Timing chain / belt slippage | Tensioner and guide rails wear with age (per WP body) | Replace timing belt or chain, tensioner, and guide rails together | Quote from your shop; varies by generation and parts source |
| Engine oil leaks | Aged gaskets seep; common on older NA/NB cars (per WP) | Replace gaskets and flush oil; do not mix old and new | Quote from your shop; depends on which gasket |
| Rust in subframe and engine bay | Age, road salt, water intrusion (per WP body) | Paint or rustproof; replace structural pieces if compromised | Quote from your shop; depends on severity |
| Pop-up headlight wiring failure (NA) | Electrical wiring ages; one motor or relay fails | Rewire headlights; option to wire each side independently per WP | Quote from your shop; minor repair |
| Soft top leaks | UV exposure cracks vinyl; rear plastic window seal fails (per WP) | Replace soft top assembly; rear window panel is replaceable separately if top is otherwise sound | Quote from your shop; full top replacement is the typical fix |
| Frame rail / rocker rot (NA) | Salted-road climates accelerate rocker and frame rust | Cut out and weld in replacement panels; structural inspection required | Quote from your shop; can be significant on rough imports |
| Early NA crankshaft (1989-1992) | Early B6-ZE crankshaft design noted as failure-prone in WP body | Confirm replacement crank installed; otherwise expect engine work | Quote from your shop; engine rebuild range |
| Hardtop hinge cracking | Repeated removal stress and age | Inspect and replace hardtop mounting hardware if cracked | Quote from your shop |
Differences between JDM & USDM
JDM Eunos Roadster (NA, 1989-1996), JDM Mazda Roadster (NB onward), USDM Mazda Miata (NA-NC), and global MX-5 (NB-ND) are the same chassis with badge and trim differences. JDM-only special editions are the key authenticity markers: V-Special and S-Limited on the NA (tan interior, BBS wheels on some V-Special builds), 10th Anniversary, Mazdaspeed MX-5 (180 hp, RH5 VJ35 turbo), MX-5 SP (200 hp, Garrett GT2560R, 100 units), Club Sport (50 units, lightweight strip-out, no A/C or stereo, Torsen LSD) on the NB. The NB Coupe was a JDM-only hardtop body style. The NR-A is a JDM-spec lightweight track-focused trim. NC introduced the PRHT power retractable hardtop globally; ND offers the soft top and the RF retractable fastback. Right-hand drive throughout the JDM run; left-hand drive on US, Canada, and most export markets.
Pre-Purchase Inspection Checklist
Walk this list with the seller, not in front of them. The Critical items mean walking away if there's no paperwork. The High items can usually be priced into the deal. A short test drive and ten minutes under the car will tell you most of what you need to know.
Critical Priority
High Priority
Medium Priority
Generation History
NA Eunos Roadster (Mazda Miata) (1989-1997)
- Debut as Eunos Roadster on the JDM market under Mazda's Eunos sub-brand
- 1.6L B6-ZE early; 1.8L BP from 1994
- Pop-up headlights — gone after NA per pedestrian-safety regulation (per WP)
- JDM-only specials: V-Special, S-Limited, M-Edition
- Two roof options: soft top (foldable) and removable hardtop
Market Data
JDM Roadsters got special editions the export Miata never saw. The NA gave you V-Special, S-Limited, and M-Edition with tan interiors and BBS wheels on some cars. The NB is where it gets interesting with the 10th Anniversary, the Mazdaspeed MX-5, the 100 unit MX-5 SP, and the 50 unit Club Sport. If you can find a documented one, that's the Roadster to buy.
Production Numbers & Rarity
| Generation | Years | Total Built | Notes |
|---|---|---|---|
| NA | 1989-1997 | 431,506 | Per WP body (Production Numbers section) |
Rarest variant: MX-5 Club Sport (NB) — 50 units total (25 hardtop, 25 soft top) per WP body
Original MSRP & Pricing
Original MSRP: USD13,800 at launch in 1989. USD launch price of the US-market Mazda MX-5 Miata is widely cited as approximately $13,800 in 1989. JDM Eunos Roadster pricing was set in yen and varied by trim; the WP body does not cite a specific JDM yen MSRP.
How It Compares
Among lightweight Japanese roadsters, the Roadster is the cheapest to buy, the easiest to fix, and the one with the most aftermarket. The S2000 has more power. The MR2 has the more exotic layout. The Roadster wins on reliability, parts, and the size of the community behind it.
| Feature | NA | Toyota MR2 (SW20) | Honda S2000 |
|---|---|---|---|
| Layout | FR, 2-seat, convertible | MR, 2-seat, T-top / coupe | FR, 2-seat, convertible / coupe |
| Engine layout | Inline-4 NA (B6/BP/MZR/SkyActiv-G) | Inline-4 NA or turbo | Inline-4 NA high-revving (F20C/F22C) |
| Curb weight | ~2,300 lb (NA/NB, per WP) | Heavier mid-engine package | ~2,800 lb |
| Stock power | ~100-200 hp factory range (per WP) | ~200-245 hp on turbo SW20 | 240+ hp on AP1/AP2 |
| Roof | Soft top / hardtop / PRHT / RF | T-top or coupe (no convertible factory) | Soft top throughout |
| Reputation | Highly reliable, project-friendly | Reliable; mid-engine adds complexity | Reliable; high-rpm engine demands care |
| Production span | 1989-present (4 generations) | 1989-1999 (SW20 only) | 1999-2009 (single generation) |
| JDM-only specials | V-Special, S-Limited, MX-5 SP, Club Sport, NR-A | G-Limited, GT-S, Bilstein editions | Type S / Type V (JDM-only) |
Comparable Alternatives
If the Roadster isn't the right car, the Honda S2000 is the natural step up with more power and more weight. The Toyota MR2 is the mid engine alternative. If you want something smaller and stranger, the Honda Beat and Suzuki Cappuccino are kei convertibles that scratch the same itch.
In Pictures
The Buyer's Read
The safest starting point is a documented NB from 1998 to 2005. That gets you the stronger BP engine, better body control than the NA, a glass rear window, and no early crankshaft concern. Skip anything under $3,000 — a cheap Roadster almost always means rust and deferred maintenance you'll inherit.
For the NA experience — pop-up headlights, Eunos badging — target a 1994 to 1997 car with the 1.8 BP. The early 1989 to 1992 cars are acceptable if the original crankshaft has been replaced, but you need to see the paperwork. Budget a couple thousand above the purchase price for soft-top replacement, sill and frame-rail inspection, and timing-belt service on any NA you buy.
Special editions carry a meaningful premium over standard cars. A verified Mazdaspeed MX-5 with the 180 horsepower turbo, front-mount intercooler, and Bilstein shocks commands more than a standard NB; condition and documentation drive the gap. The MX-5 SP at 200 horsepower is rarer at 100 units; the Club Sport at 50 units is the rarest of the run and warrants independent verification before purchase.
Verify documentation before paying any special-edition premium — badges are easy to swap, build-sheet paperwork is not. A rough NA with frame-rail rust and no service history is the configuration to walk away from regardless of asking price.
Frequently Asked Questions
- Are Eunos Roadsters (Mazda Miatas) cheap?
- Yes. Per the WP body, Miatas are relatively cheap regardless of condition — saving money toward a turbo kit or wheels.
- Is a Eunos Roadster (Mazda Miata) good for drifting?
- Yes, with caveats. Stock engines hold roughly 250 hp before bottom-end work is needed. For competitive drifting, the engine, transmission, LSD, suspension, and brakes all need upgrades (per WP).
- How long will a Miata last with OEM components?
- About 250,000 miles with reasonable care and maintenance, after which engine rebuild, suspension refresh, and paint work become typical (per WP).
- Is a Eunos Roadster (Mazda Miata) good for beginners?
- Yes. Low purchase and running costs make it a strong first car; WP body recommends it for teenagers and new drivers.
- Can I turbocharge a Eunos Roadster (Mazda Miata)?
- Yes, but the engine should be inspected before boost is added. WP recommends a turbocharger kit over sourcing individual components.
- Which Eunos Roadster production years should I avoid?
- Early NA cars (1989-1992) had crankshaft issues that could cause engine failure if the OEM crank was never replaced (per WP).
- Can I convert a hardtop Miata to a soft top?
- Yes. WP body confirms hardtop-to-soft-top conversions (and vice versa) are straightforward.
- Is the Eunos Roadster a woman's car?
- No — the Miata is gender-neutral. The size has led to that perception, but it is unrelated to the car's actual driver demographic (per WP).
Sources & References
Sources (9)
- Eunos Roadster (Mazda Miata) — JDMBUYSELL source article — JDMBUYSELLVerified
- Mazda MX-5 — Wikipedia — WikipediaVerified
- Eunos Roadster — Wikipedia — WikipediaVerified
- Mazda MX-5 Miata — Car and Driver model page — Car and DriverVerified
- Mazda Miata — MotorTrend model archive — MotorTrendVerified
- Mazda MX-5 Miata — current Mazda USA model page — Mazda North AmericaVerified
- Mazda MZR engine — Wikipedia — WikipediaVerified
- SkyActiv Technology — Wikipedia — WikipediaVerified
- Best-selling sports car — Guinness World Records — Guinness World RecordsVerified
Sources last verified: