🏷️ Basic Information Identification Make: Infiniti Model: Q45 Year: 1993 Codes Chassis Code: G50 👋 Introduction Market Position Positioning: Premium luxury sedan, competing with established European and American marques. Positioned as Infiniti's flagship model. Competitive Analysis Competitors: Lexus LS 400, Mercedes-Benz S-Class, BMW 7 Series, Cadillac DeVille Key Features Unique Selling Points: Powerful V8 engine, advanced Active Suspension (optional on some models), luxurious interior, cutting-edge technology for its time. 📋 Manual Details Coverage Areas Primary Coverage: 1993 Infiniti Q45 Page Count Estimated Pages: Extensive (digitally delivered, equivalent to several thousand printed pages) Manual Type Type: Service and Repair Manual Software (Online Access) Language Language: English Format Format: Web-based software, accessible via browser 📖 Manual Coverage Systems Covered Powertrain: Engine Mechanical, Fuel System, Ignition System, Emission Control, Exhaust System, Transmission (Automatic) Chassis: Suspension (Front & Rear), Steering, Brakes (Hydraulic, ABS), Wheels & Tires Body & Electrical: Body Panel Repair, Interior Trim, HVAC, Lighting, Wiring Diagrams, Audio System, Power Accessories (Windows, Locks, Seats), SRS (Airbag) System Procedures Included Maintenance: Scheduled Maintenance, Fluid Changes, Filter Replacements, Lubrication Repair: Engine Rebuild Procedures, Transmission Overhaul, Brake System Repair, Suspension Component Replacement, Electrical Component Diagnosis and Repair Diagnostics: Troubleshooting Guides, Fault Code Interpretation (OBD-I), Component Testing Procedures Technical Depth Depth: Comprehensive Factory-Level Detail, including diagnostics, component removal/installation, specifications, and adjustments. 📊 Manual Specifications File Format Access Method: Web Browser Accessible Print Quality Digital Resolution: High-resolution, clear text and diagrams Binding Type Binding: N/A (Digital) Paper Type Paper Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Code: VH45DE Configuration: 4.5L DOHC 32-Valve V8 Performance Horsepower: 278 hp @ 6000 rpm Torque: 290 lb-ft @ 3200 rpm Fuel System Injection Type: Multi-Point Fuel Injection (MPFI) Fluid Specifications Oil Type: API SG/SH, SAE 10W-30 (or 5W-30 for colder climates) Coolant Type: Nissan Genuine Super Long Life Coolant (Blue) or equivalent, 50/50 mix with distilled water 🔧 Transmission Standard Type: 4-speed Automatic (RE4R01A) Optional Availability: N/A (All 1993 Q45 models equipped with the 4-speed automatic) Features Shift Modes: Normal, Sport Fluid Specifications Transmission Fluid Type: Nissan Genuine Matic J ATF or Dexron III/Mercon 📐 Dimensions Exterior Length: 199.2 inches Width: 71.7 inches Height: 55.7 inches Wheelbase: 113.2 inches Weights Curb Weight: Approximately 4,000-4,150 lbs (depending on options) Gross Vehicle Weight Rating: Approximately 5,150 lbs 🛡️ Safety Features Ratings NHTSA Front Crash Test Rating: Not rated for this specific year, but generally considered safe for its era. Active Features ABS: Standard Anti-lock Braking System (ABS) Traction Control: Optional (Active Traction Control - ATC) Passive Features Airbags: Driver and Passenger Airbags (SRS) Seatbelts: Three-point Inertia-reel seatbelts with front pretensioners 💡 Technology Features Infotainment Audio System: Premium Bose sound system with cassette player and AM/FM radio. Optional CD changer. Navigation: Optional factory navigation system (often CRT-based). Driver Assistance Cruise Control: Standard electronic cruise control. Keyless Entry: Optional keyless entry system. Connectivity Connectivity Features: Limited by era; primarily focused on internal vehicle systems rather than external connectivity. 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 6 months, whichever comes first (under normal driving conditions). Tune Up Interval: Spark plugs typically every 60,000 miles. Refer to manual for detailed schedule. Transmission Fluid Change: Every 30,000 miles or 24 months (severe use: 15,000 miles/12 months). Fluid Specifications Brake Fluid Type: DOT 3 Power Steering Fluid: Nissan Genuine PSF or Dexron II/III ATF Known Issues Common Problems Engine: Timing belt tensioner leaks, potential for head gasket issues (though less common than some rivals), oil leaks from valve covers. Common Problems Suspension: Hydraulic suspension (HICAS) components can wear, leading to clunking or instability. Standard suspension bushings can degrade over time. Common Problems Electrical: Power window motors, door lock actuators, and ABS sensors can be prone to failure. Climate control units can have faulty resistors or displays. Parts Information Spark Plug Part Number Example: NGK PLFR5A-11 (refer to manual for exact fitment) Oil Filter Part Number Example: Nissan 15208-H7201 (or equivalent aftermarket) 📚 Vehicle History Brand Heritage Brand Origin: Infiniti is the luxury division of Nissan, established in 1989 to compete in the premium automotive market. Model Evolution First Generation: The Infiniti Q45 debuted for the 1990 model year as Infiniti's flagship sedan. The 1993 model represents the first significant facelift and update to the first generation (G50). Production Manufacturing Location: Japan Production Years First Gen: 1990-1996 🏆 Awards & Recognition Recognitions Car And Driver 10 Best: Named to Car and Driver's 10 Best list for 1991 and 1992. Ratings Initial Reviews: Generally received positive reviews for its performance, luxury, and value proposition against established European luxury brands. Certifications Oem Licensing: Officially licensed by Infiniti/Nissan, ensuring accuracy and completeness of information derived from OE materials.