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.
- Eunos Roadster launched in Japan in September 1989 under Mazda's new Eunos sales channel, priced at 1,700,000 yen
- 1.6, then 1.8 liters — Hagerty's buying guide reports the first-generation car launched with a 1.6-liter engine, increased to 1.8 liters in 1994
- Jinba-ittai — Mazda's own phrase for its driving philosophy — is what Mazda credits for the original Roadster's 'fun to drive' character
- Timing-belt replacement about every 80,000 miles, or about five years is the interval Hagerty's buying guide names as essential maintenance
- Every NA already clears the 25-year US import age condition — confirm current import, EPA, and state requirements for the individual car
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 | 1989-1993 early NA; DOHC 16V four; smaller intake and exhaust |
| NA | BP | 1.8L | Up to ~160 hp | 1994-1997 later NA; Mazdaspeed supercharged variant; 2.0L stroker offered by Mazdaspeed |
Transmission Options
| Type | Ratios | Availability | Notes |
|---|---|---|---|
| 5-speed manual | Not cited | NA and NB standard; NC base | Standard transmission across NA/NB; NC base spec |
| 6-speed manual | Not cited | NB special editions (10th Anniversary, Mazdaspeed, MX-5 SP); NC optional; ND | 6-speed manual was special-edition only on NB |
| 4-speed automatic | Not cited | NA and NB optional | Older automatic offered alongside 5MT |
| 6-speed automatic with paddle shifters | Not cited | NB special spec onward; NC option | 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
- Rear Seats
- None
- Two-seat configuration across all four generations
- Cargo
- Small trunk; varies slightly by generation
- 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 low-volume MX-5 SP, and the rarer-still Club Sport. Exact production numbers for both aren't independently verified. 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
- Jinba-ittai driving philosophy Mazda's own materials describe the original Roadster's 'fun to drive' character as coming out of its pursuit of Jinba-ittai — “a refreshing driving experience in an open-top sports car and emotional, cute design.”
- 1.6 and 1.8 engines across the generation Hagerty's buying guide reports the first-generation car launched with a 1.6-liter engine, increased to 1.8 liters in 1994 — confirm which an individual import carries.
Why You Might Not
- Rust in the rocker panels and wheel arches Hagerty's buying guide says rust can be a problem in maritime climates or where roads are salted, and will show up in the rocker panels and wheel arches.
- Timing belt is essential, scheduled maintenance Hagerty's buying guide names timing-belt replacement about every 80,000 miles, or about five years, as essential maintenance beyond oil changes and brake pads.
- Early air conditioning needs an R12-to-R134 conversion Hagerty's buying guide says 1990-92 cars have R12 Freon in the air conditioning and the seals will need to be changed before the system can be charged with R134.
Who Should NOT Buy This
- Buyers who cannot verify recent timing-belt service on a car near or past the roughly 80,000-mile/five-year interval Hagerty's buying guide cites
- Buyers unwilling to inspect the rocker panels and wheel arches for rust before purchase
- Buyers who assume factory air conditioning works on an early (1990-92) car without checking for an R12-to-R134 conversion
- Buyers who have not confirmed the individual car's engine displacement (1.6-liter or 1.8-liter) and manufacture date before comparing listings
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 belt due | Hagerty's buying guide names timing-belt replacement about every 80,000 miles, or about five years, as the car's essential scheduled maintenance. | Verify timing-belt service records before purchase; budget for replacement if records are missing or the interval has passed. | Get a written estimate for timing-belt replacement. |
| Rust in rocker panels and wheel arches | Hagerty's buying guide says rust can be a problem in maritime climates or places where roads are salted. | Inspect the rocker panels and wheel arches for rust before purchase. | Get a written estimate for any rust repair found. |
| Cold-start lifter tick | Hagerty's buying guide says it isn't uncommon for lifters to tick at cold start, which can also indicate the oil needs changing. | Check oil condition and change if overdue; monitor whether ticking persists after a fresh oil change. | Oil-change cost; further diagnosis if ticking persists. |
| Aging soft top | Hagerty's buying guide says to expect the vinyl soft top to last about 5-7 years. | Inspect the soft top's age and condition before purchase. | Get a written estimate for soft-top replacement if worn. |
Differences between JDM & USDM
Hagerty's buying guide reports the first-generation car launched with a 1.6-liter engine, increased to 1.8 liters in 1994, and that the car was sold as the Miata in North America and Australia and as a separate line, the Eunos, in Japan — confirm which displacement and market spec an individual import carries.
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
- 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 low-volume MX-5 SP, and the rarer-still Club Sport. Exact production numbers for both aren't independently verified. 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 | Production Numbers section |
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) | Heavier mid-engine package | ~2,800 lb |
| Stock power | ~100-200 hp factory range | ~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.
Suzuki Cappuccino
Kei FR roadster — turbo three-cylinder, removable roof panels
Nissan 350Z
Larger FR sports car with more power and convertible variant
In Pictures
The Buyer's Read
Start with the sales channel and market: Mazda's own materials say the original Roadster launched in Japan in September 1989 under the new Eunos sales channel, priced at 1,700,000 yen, and Hagerty's buying guide reports it was sold as the Miata in North America and Australia. Then confirm the engine — Hagerty's guide reports the first-generation car launched with the 1.6-liter and grew to 1.8 liters in 1994, so displacement varies car to car.
Hagerty's buying guide names timing-belt replacement about every 80,000 miles, or about five years, as essential maintenance, and says rust can show up in the rocker panels and wheel arches. On a 1990-92 car, check whether the factory R12 air conditioning has been converted to R134.
Every NA already clears the 25-year age condition in 49 CFR 591.5(i)(1) — Mazda's own materials place the second-generation Roadster's Japan launch in January 1998, so no NA is younger than that. Confirm current import, EPA, and state requirements for the specific car. Browse what's currently available across the NA range.
Frequently Asked Questions
- When was the original Roadster launched, and under what brand?
- Mazda's own materials say the car was launched in 1989 in Japan under Mazda's new sales channel, Eunos, at 1,700,000 yen.
- Did Japan get a different engine choice than North America?
- Hagerty's buying guide reports the first-generation car launched with the 1.6-liter engine, increased to 1.8 liters in 1994 — displacement varies by car, so confirm the individual example.
- How often does the NA need a timing belt?
- Hagerty's buying guide names timing-belt replacement about every 80,000 miles, or about five years.
- Can I import an NA into the US today?
- The cited 49 CFR provision applies once the individual vehicle is 25 or more years old; every NA already clears that condition, since Mazda's own materials place the second-generation Roadster's Japan launch in January 1998. Confirm current import, EPA, and state requirements for the specific car.
Sources & References
Sources (9)
- Eunos Roadster (Mazda Miata) — JDMBUYSELL source article — JDMBUYSELL Verified
- Mazda MX-5 — Wikipedia — Wikipedia Verified
- Eunos Roadster — Wikipedia — Wikipedia Verified
- Mazda MX-5 Miata — Car and Driver model page — Car and Driver Verified
- Mazda Miata — MotorTrend model archive — MotorTrend Verified
- Mazda MX-5 Miata — current Mazda USA model page — Mazda North America Verified
- Mazda MZR engine — Wikipedia — Wikipedia Verified
- SkyActiv Technology — Wikipedia — Wikipedia Verified
- Best-selling sports car — Guinness World Records — Guinness World Records Verified
Sources last verified: