🏷️ Basic Information

Make:

Mazda

Model:

Miata

Generation:

First Generation (NA)

Model Year:

1990

👋 Introduction

Vehicle Market Segment:

Lightweight, affordable, rear-wheel-drive sports car. Known for its pure driving experience and accessible price point.

Vehicle Target Audience:

Enthusiasts seeking a fun, engaging, and driver-focused convertible; individuals looking for a classic modern sports car experience.

Key Competitors 1990:

Lotus Elan, Triumph Spitfire (older models), MG Midget (older models), potentially some Datsun Z-cars and Alfa Romeo Spiders for spirit, though less direct competition in its price bracket.

Competitive Advantage:

Reliability, affordability, widespread parts availability, excellent handling dynamics, and a commitment to the traditional sports car formula.

Vehicle Key Features:

Lightweight construction, rear-wheel drive, front-mid engine layout, near 50/50 weight distribution, pop-up headlights, convertible soft-top, simple and functional interior, excellent steering feel.

Manual Utility:

Essential resource for owners and mechanics to maintain, diagnose, and repair the 1990 Mazda Miata effectively, preserving its driving enjoyment and value.

📋 Manual Details

Systems Covered:

Engine Mechanical, Engine Fuel & Emission Control, Cooling System, Lubrication System, Ignition System, Starting System, Charging System, Clutch, Transmission (Manual), Driveshaft, Differential, Suspension (Front & Rear), Steering System, Brakes (Front & Rear), Wheels & Tires, Body & Frame, Electrical System, Climate Control, Interior, Exterior, Wiring Diagrams, Troubleshooting, Specifications

Estimated Page Count:

1500+

Manual Type:

Workshop Manual / Service Manual / Repair Manual

Language:

English

Format:

PDF

Media Format:

Quality CD-ROM

📖 Manual Coverage

Engine Systems:

Detailed coverage of the 1.6L DOHC (B6ZE) engine, including disassembly, assembly, inspection, and torque specifications for all components. Covers fuel injection, ignition timing, emissions controls (EGR, EVAP), cooling system, lubrication, and starting/charging systems.

Drivetrain Systems:

Comprehensive guidance on the manual transmission (BP4W), clutch system (hydraulic), driveshaft, universal joints, and rear differential (open differential standard). Includes removal, installation, and adjustment procedures.

Chassis Systems:

In-depth coverage of the independent front and rear suspension, steering rack, power steering (if applicable to specific trims), and brake systems (front discs, rear discs). Includes wheel alignment specifications, brake caliper and master cylinder procedures, and ABS troubleshooting (if equipped).

Electrical Systems:

Detailed electrical schematics, wiring diagrams for all major systems (engine management, lighting, accessories, instrumentation), fuse/relay identification, and troubleshooting procedures for common electrical faults.

Maintenance Procedures:

Routine maintenance tasks such as oil changes, filter replacements, spark plug replacement, belt adjustments, brake fluid flushes, coolant changes, and general inspections.

Repair Procedures:

Step-by-step instructions for engine overhaul, transmission rebuild, suspension component replacement, brake system repairs, electrical component diagnosis and repair, and body panel repair.

Troubleshooting Guides:

Systematic diagnostic procedures for identifying and resolving common problems, including engine performance issues, starting difficulties, electrical gremlins, and suspension noises.

Special Tools And Jigs:

Identification and usage instructions for specialized tools required for specific repair procedures, ensuring accuracy and preventing damage.

Diagnostic Capabilities:

Advanced diagnostics for engine control unit (ECU) and sensor readings, including specific diagnostic trouble codes (DTCs) where applicable. Coverage extends to intermittent fault diagnosis.

Rebuild Procedures:

Complete engine and transmission rebuild procedures with detailed component specifications, clearances, torque sequences, and assembly instructions. Includes seal and gasket replacement guidelines.

Bodywork And Trim:

Information on body panel removal and installation, interior trim component disassembly, and basic body repair techniques.

📊 Manual Specifications

PDF Quality:

High-resolution, searchable PDF optimized for digital viewing and printing. Images and diagrams are clear and detailed.

Printability:

Designed for easy printing of individual sections or the entire manual. Formatted for standard paper sizes (e.g., Letter, A4).

Searchability:

Full text search functionality allows quick access to specific topics, procedures, and part numbers.

Cd Media Quality:

High-quality CD-ROM media ensuring data integrity and long-term storage. Presented in a protective jewel case.

Manual Binding:

Not applicable (digital format on CD).

Manual Paper Type:

Not applicable (digital format on CD).

⚙️ Engine Specifications

Engine Code:

B6ZE (DOHC 16-valve)

Engine Type:

Naturally Aspirated Inline-4

Displacement Cc:

1598

Bore X Stroke Mm:

78.0 x 83.6

Compression Ratio:

9.0:1

Horsepower Ps At Rpm:

115 PS @ 6500 RPM

Torque Lb-Ft At Rpm:

100 lb-ft @ 5000 RPM

Fuel Delivery:

Electronic Fuel Injection (EFI) with multi-point injection (MPI)

Fuel Type:

Unleaded gasoline (91 octane or higher recommended)

Oil Capacity Liters:

3.7 (with filter)

Coolant Capacity Liters:

5.7

🔧 Transmission

Transmission Type:

5-speed Manual (BP4W)

Optional Transmission Type:

None offered for 1990 model year in most markets.

Clutch Type:

Hydraulic, dry single-plate

Gear Ratios 1St:

3.167

Gear Ratios 2Nd:

1.842

Gear Ratios 3Rd:

1.310

Gear Ratios 4Th:

1.000

Gear Ratios 5Th:

0.768

Gear Ratios Reverse:

3.167

Transmission Fluid Type:

API GL-5, SAE 75W-90 gear oil

Transmission Fluid Capacity Liters:

2.1

📐 Dimensions

Length Mm:

3955

Width Mm:

1675

Height Mm Soft Top Up:

1235

Wheelbase Mm:

2265

Front Track Mm:

1420

Rear Track Mm:

1430

Ground Clearance Mm:

130

Curb Weight Kg:

955

Gross Vehicle Weight Rating Kg:

1270

Standard Wheel Size:

14 x 5.5 inches

Standard Tire Size:

185/60R14

Bolt Pattern:

4x100

Offset Et:

+35mm (approx)

🛡️ Safety Features

NHTSA Frontal Crash Rating:

Not extensively tested by NHTSA in its current form. Mazda focused on structural integrity for a convertible.

IIHS Crash Test Data:

Limited specific data for this early model year. Emphasis was on driver engagement over advanced safety features.

ABS Availability:

Optional on some early models, standard on later NA generations, and common on many 1990 models depending on market. Check specific vehicle VIN.

Traction Control Availability:

Not available on 1990 model.

Airbags:

Driver airbag standard. Passenger airbag not available.

Rollover Protection:

Reinforced A-pillars and windshield frame. No pop-up roll bar system in this generation.

Seatbelts:

Three-point inertia-reel seatbelts

💡 Technology Features

Infotainment System:

Basic AM/FM/Cassette stereo system. Optional CD player available on some trims/markets. Manual antenna operation.

Speaker Configuration:

Typically 4 speakers (2 dashboard, 2 roll bar/headrest area).

Cruise Control Availability:

Optional on most 1990 models.

Anti Lock Brakes:

Optional as mentioned in safety section.

Bluetooth Connectivity:

Not applicable.

Usb Port:

Not applicable.

Power Windows:

Standard on most models.

Power Steering:

Optional on some early models, standard on many later NA versions and some 1990 variants.

Air Conditioning:

Optional on most models.

🔧 Maintenance

Oil Change Interval Miles Km:

Every 7,500 miles (12,000 km) or 6 months, whichever comes first.

Air Filter Replacement Interval:

Every 15,000 miles (24,000 km) or annually.

Spark Plug Replacement Interval:

Every 30,000 miles (48,000 km).

Coolant Flush Interval:

Every 30,000 miles (48,000 km) or 2 years.

Timing Belt Replacement Interval:

Not applicable (uses a timing chain).

Engine Oil Type And Viscosity:

API SG or SH, SAE 10W-30 (preferred) or 5W-30. Refer to manual for seasonal variations.

Brake Fluid Type:

DOT 3

Power Steering Fluid Type:

Dexron II or equivalent (if power steering equipped).

Common Issues Engine:

Oil leaks from valve cover gasket and front crankshaft seal. Potential for timing belt tensioner failure (though chain is robust). High oil consumption in some high-mileage engines.

Common Issues Chassis:

Rust in rocker panels, rear fender lips, and sills. Differential pinion seal leaks. Worn sway bar bushings and tie rod ends leading to imprecise steering feel. 'The Window Gap' (uneven panel gaps) in some early cars.

Common Issues Electrical:

Corroded grounds, failing window regulators, aging fuel pump and fan relays. Pop-up headlight motor issues.

📚 Vehicle History

Mazda Heritage:

Mazda's heritage includes pioneering rotary engines and a long history of building well-engineered, driver-focused vehicles. The Miata was conceived to revive the spirit of classic British roadsters.

Mx5 History Genesis:

Developed under project name 'Codename: Sophie' and officially launched as the Eunos Roadster in Japan and Mazda MX-5 Miata in North America and other markets. It was an instant critical and commercial success, defining the affordable sports car segment for decades.

Na Generation Years:

1989-1997

Production Location:

Hiroshima, Japan

Production Volume 1990:

Approx. 35,000 units worldwide

🏆 Awards & Recognition

Car And Driver 10Best:

Car and Driver 10 Best list for 1990.

Automotive Journalism Awards:

Received numerous awards and accolades from automotive publications globally for its driving dynamics and value.

Iso Certification Manufacturing:

Mazda's manufacturing facilities adhere to stringent ISO quality standards.