The Mazda MX-5 NB, produced between 1998 and 2005, represented the second generation of Mazda’s iconic roadster. The 1.8i 16V variant, specifically those manufactured from 2000 to 2005, occupied a sweet spot in the lineup, offering a balance of performance and affordability. This model aimed to broaden the MX-5’s appeal, providing a more accessible entry point into the world of open-top motoring while retaining the core driving experience that defined the car. It was positioned as a step up from the earlier 1.6L models, offering increased power and refinement, but remained below the more focused, and often more expensive, special editions.
Technical Specifications
| Brand | Mazda |
| Model | MX-5 |
| Generation | MX-5 II (NB) |
| Type (Engine) | 1.8i 16V (146 Hp) |
| Start of production | 2000 year |
| End of production | 2005 year |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Roadster |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 11.9 l/100 km (19.8 US mpg, 23.7 UK mpg, 8.4 km/l) |
| Fuel consumption (economy) – extra urban | 7.2 l/100 km (32.7 US mpg, 39.2 UK mpg, 13.9 km/l) |
| Fuel consumption (economy) – combined | 8.9 l/100 km (26.4 US mpg, 31.7 UK mpg, 11.2 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.4 sec |
| Acceleration 0 – 62 mph | 8.4 sec |
| Acceleration 0 – 60 mph | 8 sec |
| Maximum speed | 208 km/h (129.25 mph) |
| Weight-to-power ratio | 7.3 kg/Hp, 137.1 Hp/tonne |
| Weight-to-torque ratio | 6.3 kg/Nm, 157.7 Nm/tonne |
| Power | 146 Hp @ 7000 rpm |
| Power per litre | 79.3 Hp/l |
| Torque | 168 Nm @ 5000 rpm (123.91 lb.-ft. @ 5000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | BP-Z3 |
| Engine displacement | 1840 cm3 (112.28 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 85 mm (3.35 in.) |
| Compression ratio | 10:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Kerb Weight | 1065 kg (2347.92 lbs.) |
| Max. weight | 1280 kg (2821.92 lbs.) |
| Max load | 215 kg (473.99 lbs.) |
| Trunk (boot) space – minimum | 145 l (5.12 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Length | 3975 mm (156.5 in.) |
| Width | 1680 mm (66.14 in.) |
| Height | 1220 mm (48.03 in.) |
| Wheelbase | 2265 mm (89.17 in.) |
| Front track | 1405 mm (55.31 in.) |
| Rear (Back) track | 1430 mm (56.3 in.) |
| Minimum turning circle | 9.7 m (31.82 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 5 gears, manual transmission |
| Front suspension | Spring Strut |
| Rear suspension | Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | 195/50 R15 84 V; 205/45 ZR16 83 W |
| Wheel rims size | 6J x 15 ET 40; 6.5J x 16 ET 42 |
Powertrain & Engine Architecture
The heart of the 1.8i variant is the BP-Z3 engine, a 1.8-liter inline-four cylinder powerplant. This engine utilizes a naturally aspirated configuration with multi-port fuel injection and a double overhead camshaft (DOHC) valvetrain. The BP-Z3 produced 146 horsepower at 7000 rpm and 168 Nm (124 lb-ft) of torque at 5000 rpm. The engine’s design prioritized smooth power delivery and reliability over outright peak performance. The 5-speed manual transmission was the most common pairing, offering precise shifts and a direct connection to the rear wheels. The engine’s longitudinal mounting, a hallmark of the MX-5, contributes to its balanced handling characteristics.
Driving Characteristics
The 1.8L engine, coupled with the 5-speed manual transmission, provided a lively and engaging driving experience. While not as brutally quick as some of its competitors or even higher-spec MX-5 variants, the 1.8i offered ample power for spirited driving on winding roads. The gear ratios were well-matched to the engine’s powerband, allowing for quick acceleration in each gear. The relatively light weight of the MX-5 (around 2350 lbs) further enhanced its agility. Compared to the earlier 1.6L models, the 1.8i felt noticeably more responsive, particularly in the mid-range. It lacked the raw punch of the later turbocharged models, but offered a more predictable and accessible power delivery.
Equipment & Trim Levels
The 1.8i typically came equipped with standard features such as power steering, disc brakes on all four wheels with ABS, and a leather-wrapped steering wheel. Interior upholstery was generally cloth, though leather options were available. Dashboard configuration was relatively simple and driver-focused. Common optional extras included air conditioning, a limited-slip differential, and upgraded audio systems. Later models saw the introduction of features like a glass rear window with a heater, and improved interior trim materials. The trim level often dictated the availability of these options.
Chassis & Braking
The MX-5 NB retained the front mid-engine, rear-wheel-drive layout of its predecessor, contributing to its excellent balance. The suspension consisted of independent double wishbones at the front and a multi-link setup at the rear. The 1.8i models generally featured a stabilizer bar on both the front and rear axles to reduce body roll. Braking duties were handled by ventilated discs on all four wheels, providing ample stopping power. The relatively lightweight construction of the chassis further enhanced the car’s handling prowess.
Market Reception & Comparison
The 1.8i MX-5 NB was generally well-received by automotive critics. It was praised for its engaging driving dynamics, responsive engine, and overall value. Fuel economy was respectable for a sports car, averaging around 26 mpg in combined driving. Compared to the 1.6L models, the 1.8i offered a noticeable performance improvement. Compared to the more expensive and performance-oriented special editions, the 1.8i provided a more accessible entry point into the MX-5 experience. Reliability was generally good, although regular maintenance was essential to prevent issues with the cooling system and oil consumption.
Legacy
The Mazda MX-5 NB 1.8i remains a popular choice among enthusiasts today. Its simple mechanicals, readily available parts, and engaging driving experience make it a rewarding car to own and maintain. While some examples may exhibit age-related issues such as rust or wear and tear, the BP-Z3 engine is known for its durability. The 1.8i variant offers a compelling blend of performance, affordability, and reliability, ensuring its continued appeal in the used car market. It represents a significant chapter in the MX-5’s history, solidifying its reputation as one of the best roadsters ever made.
