🏷️ Basic Information Identification Make: Mazda Model: MX-5 Miata Year: 1990 Market: USA Codes Chassis Code: NA (First Generation) 👋 Introduction Market Position Product Purpose: Essential resource for owners and technicians to accurately identify and source Mazda MX-5 Miata chassis and body parts. Competitive Analysis Value Proposition: Provides direct access to OEM part numbers, eliminating guesswork and ensuring correct part selection for repairs and restoration. Key Features Key Feature 1: Comprehensive coverage of all chassis and body components for the 1990 US-market MX-5 Miata. Key Feature 2: Detailed exploded view diagrams facilitating easy part identification and assembly understanding. Key Feature 3: Accurate OEM part numbers essential for ordering from dealerships or aftermarket suppliers. 📋 Manual Details Coverage Areas Manual Type: Parts Catalog Language: English Format: Printed Specific Coverage: Chassis and Body Components 📖 Manual Coverage Systems Covered Chassis Components: Frame, subframes, body mounts, suspension mounting points, steering linkage mounting Body Panels Exterior: Front/rear fenders, hood, doors, trunk lid, bumpers, rocker panels, quarter panels, windshield frame, rear bulkhead Body Panels Interior: Dashboard structure, door panels, floor pan components, seat mounting points, center console structure Glass And Seals: Windshield, side glass, rear glass, window seals, door seals, trunk seals Hardware: Bolts, nuts, clips, fasteners specific to chassis and body assembly Procedures Included Part Identification: Accurate identification of OEM Mazda parts for chassis and body repairs Assembly Diagrams: Exploded view diagrams for all chassis and body components Part Number Lookup: Cross-referencing of part numbers for ordering and replacement Technical Depth Depth: Detailed breakdown of all chassis and body components, including fasteners and sub-assemblies. 📊 Manual Specifications File Format File Type: Printed Document Searchability: Index-based lookup by component name or part number. Print Quality Print Type: Professional Offset Printing Image Resolution: High-resolution diagrams for clarity Binding Type Binding: Staple-bound or perfect-bound, designed for workshop durability. Paper Type Paper Quality: Durable, coated paper stock to withstand workshop conditions ⚙️ Engine Specifications Primary Engine Engine Code: B6 (1.6L) Engine Type: Inline 4-cylinder, DOHC, 16-valve Performance Displacement: 1597 cc (97.4 cu in) Bore X Stroke: 81.0 mm x 79.2 mm Compression Ratio: 9.4:1 Horsepower: 116 hp @ 6500 rpm Torque: 100 lb-ft @ 5000 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline (87 octane recommended) 🔧 Transmission Standard Transmission Type Standard: 5-speed Manual Transmission Optional Transmission Type Optional: 4-speed Automatic Transmission Features Clutch Type: Hydraulic, single dry plate Manual Gear Ratios: Refer to specific manual appendix for detailed ratios (e.g., 1st: 3.133, 2nd: 1.800, 3rd: 1.333, 4th: 1.000, 5th: 0.816, Reverse: 3.346) 📐 Dimensions Exterior Length: 3950 mm (155.5 in) Width: 1690 mm (66.5 in) Height: 1235 mm (48.6 in) Wheelbase: 2265 mm (89.2 in) Front Track: 1435 mm (56.5 in) Rear Track: 1430 mm (56.3 in) Ground Clearance: 135 mm (5.3 in) Weights Curb Weight: Approx. 955-980 kg (2105-2160 lbs), depending on transmission and options. Gross Vehicle Weight Rating: Not typically specified for this model; relates to load capacity. Cargo Trunk Volume: Approx. 150 liters (5.3 cu ft) with soft-top up. 🛡️ Safety Features Ratings NHTSA Rating: No specific NHTSA rating available for 1990 models, but designed to meet all US safety standards. Active Features Braking System: Power-assisted front disc brakes, rear drum brakes (later models/options may have rear discs). Anti Lock Braking System: Optional on some later models, not standard on 1990. Passive Features Airbags: Driver-side airbag not standard on 1990 models; introduced in later years. Seat Belts: Three-point inertia-reel seat belts Roll Over Protection: Reinforced A-pillars and optional pop-up roll bar for enhanced occupant protection. 💡 Technology Features Infotainment Audio System: Factory fitted radio with cassette player, typically 2 or 4 speakers. Aftermarket upgrades common. Driver Assistance Cruise Control: Optional on some models. Connectivity Connectivity Features: None standard; basic automotive technology of its era. 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 miles or 6 months, whichever comes first. Air Filter Replacement: Every 15,000 miles or 12 months. Spark Plug Replacement: Every 30,000 miles. Use NGK BKR5E-11 or equivalent. Timing Belt Replacement: Every 60,000 miles or 4 years. Critical maintenance item due to interference engine design. Fluid Specifications Engine Oil: API SG or SH, SAE 5W-30 or 10W-30. Capacity: 3.5 quarts (3.3 L) with filter change. Coolant: 50/50 mix of Mazda Super Coolant (or equivalent ethylene glycol-based) and distilled water. Capacity: 6.2 quarts (5.9 L). Transmission Fluid Manual: API GL-4 SAE 75W-90 gear oil. Capacity: 2.1 quarts (2.0 L). Transmission Fluid Automatic: Dexron-II or equivalent. Capacity: 3.5 quarts (3.3 L) for change, 7.7 quarts (7.3 L) for overhaul. Brake Fluid: DOT 3 or DOT 4 brake fluid. Known Issues Common Issue 1: Crankshaft front seal leaks (oil). Common Issue 2: Radiator leaks or corrosion. Common Issue 3: Window regulator mechanisms can become stiff or fail. Common Issue 4: Door lock actuators and window switches can fail. Common Issue...