Mazda MX-5 Miata NB Japanese RS
A Japanese-market NB Roadster grade pairing a 1.8-litre engine with a six-speed manual transmission, documented in Mazda releases from 1998, 2000 and 2003.
Identity and scope
The RS was a Japanese-market grade of the second-generation Mazda MX-5 Miata (NB), sold domestically as the Mazda Roadster. It combined the open two-seat body with a 1.8-litre engine and six-speed manual transmission. RS identifies a variant within the generation, rather than a separate generation or engine family.
Mazda listed RS and RS-II separately. Their shared transmission does not make them interchangeable trim names. The specifications below are tied to dated Japanese announcements rather than applied to every NB RS.
Early documentation and anniversary connection
Mazda’s December 15, 1998 announcement identifies the 1.8-litre, six-speed RS with an optional equipment package as the basis for the 10th Anniversary Edition. This establishes the RS in contemporary documentation by that date; the anniversary edition’s Japanese sale date of January 4, 1999 is not the launch date of the ordinary RS.
The announcement also explains that the six-speed transmission had previously been available only in Japan. The RS therefore provides context for the anniversary edition’s introduction of this transmission to overseas markets. Its special colours, numbered identification and limited-edition allocation should not be attributed to the standard RS. Mazda’s anniversary announcement.
The July 2000 revision
Mazda’s July 18, 2000 announcement describes a revised Roadster with a five-point grille, slimmer headlamps and structural improvements. Its Japanese price table places RS under the 1.8-litre DOHC engine with Sequential Valve Timing, paired with a six-speed manual. The engine was rated at 118 kW (160 PS) at 7,000 rpm and 170 Nm at 5,500 rpm; these are specifications for the announced revision, not for the earlier RS.
RS and RS-II received 205/45R16 tyres, lightweight aluminium wheels, additional body reinforcements and Bilstein dampers. Mazda specified larger brake discs for the models with 16-inch tyres. The RS had a black interior, while RS-II used black and red. These distinctions establish both the handling emphasis and the separate identity of the two grades. Mazda’s July 2000 announcement.
The September 2003 range
The revised Japanese range went on sale on September 18, 2003. Mazda again listed the 1800 DOHC RS with a six-speed manual, priced at ¥2,350,000 before tax, alongside the separately priced RS-II.
The announcement specified aluminium-finish cockpit details across the range. For RS, it explicitly identified an aero board incorporating a storage box and two speakers, plus a leather parking-brake lever. These details describe the September 2003 offering and should not be projected onto earlier cars.
The contemporary Japanese M occupied the 1600 DOHC part of the lineup, helping distinguish the RS’s engine and transmission combination within the domestic range. Mazda’s September 2003 announcement.
Chronology and evidence limits
The reviewed announcements document RS in December 1998, July 2000 and September 2003. These are calendar-date evidence points, not a verified continuous production interval or export model-year designation. The full RS production span, variant-specific production total and assembly location remain unverified here.
Its historical significance is clearest in its documented relationship to the anniversary edition and Mazda’s continued development of a handling-focused domestic grade. Later equipment should be checked against the relevant Japanese catalogue rather than inferred from the RS name alone.