🏷️ Basic Information Identification Make: Infiniti Model: Q45 Year: 1998 Codes Chassis Code: G50 👋 Introduction Market Position Vehicle Segment: Full-size luxury sedan Competitive Analysis Key Competitors: Lexus LS 400, BMW 7 Series, Mercedes-Benz S-Class, Cadillac DeVille Key Features Value Proposition: Provides extensive, licensed OE repair information for DIYers and professionals, offering a more convenient and cost-effective alternative to older printed manuals. 📋 Manual Details Identification Manual Product Name: 1998 Infiniti Q45 Service & Repair Manual Software Format Manual Type: Digital Service and Repair Manual Software Format Type: Online Access (Web Browser) Access Duration: 1 Year (with option for renewal) Language Language: English Coverage Areas Software Compatibility: PC, Laptop, Smartphone, Tablet (requires internet connection and web browser) 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, engine management, fuel system, ignition system, exhaust system, drivetrain (front-wheel drive) Chassis: Suspension (front and rear), steering system, brakes (front and rear), wheels and tires Body: Body panels, interior trim, exterior trim, doors, windows, locks, seat mechanisms Electrical: Wiring diagrams, lighting, power distribution, starting and charging system, instrument cluster, audio system, climate control electronics Climate Control: HVAC system operation, diagnosis, and repair (including A/C refrigerant) Procedures Included Maintenance: Scheduled maintenance, fluid changes (oil, coolant, brake, transmission, power steering), filter replacements, lubrication Repair: Engine overhaul, transmission repair, brake caliper/rotor replacement, suspension component replacement, steering rack overhaul, electrical component diagnosis and replacement Diagnostics: Troubleshooting guides, diagnostic trouble codes (DTCs) related to engine and powertrain control modules, component testing procedures Body And Trim Repair: Procedures for interior and exterior panel removal, installation, and adjustment, including door mechanisms, trim pieces, and bumper covers. Steering System Repair: Detailed steps for steering column removal, steering rack diagnosis and repair, power steering pump replacement, and alignment procedures. Brake System Repair: Comprehensive guide for brake pad and rotor replacement, caliper service, brake line inspection and replacement, brake bleeding procedures, and ABS component diagnosis. Technical Depth Depth Level: Comprehensive OE-derived technical information, suitable for DIYers and professional technicians Wiring Diagrams: Inclusion of detailed, system-specific wiring diagrams for accurate electrical troubleshooting. Torque Specifications: Precise torque values for critical fasteners across all major components. Diagnostic Trouble Codes: Explanation of common DTCs and systematic troubleshooting trees for diagnosing electronic issues. 📊 Manual Specifications File Format Digital Format Details: Web-based interactive platform, licensed OE data Print Quality Print Availability: Not a printable manual in the traditional sense, but content can be accessed and viewed on screen. Binding Type Binding Style: N/A (Online Access) Paper Type Paper Quality: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Code: VQ35DE Engine Type: 3.5L V6 DOHC 24-Valve Performance Horsepower: 240 hp @ 6000 rpm Torque: 246 lb-ft @ 4800 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) Fluid Specifications Engine Oil Type: API SG or SH, SAE 5W-30 (check manual for specific climate recommendations) Engine Oil Capacity: Approx. 4.7 US quarts (4.4 liters) with filter change Coolant Type: Nissan Genuine Super Long Life Coolant (Blue) or equivalent silicate-free, ethylene glycol-based coolant Timing Timing Mechanism: Timing Chain 🔧 Transmission Standard Transmission Type: 4-speed Automatic (RE4R01A) Optional Optional Transmission: N/A for 1998 model year Features Transmission Features: Electronically controlled, adaptive shift logic Fluid Specifications Transmission Fluid Type: Nissan Genuine Matic D ATF or Dexron III compatible Transmission Fluid Capacity: Approx. 9.3 US quarts (8.8 liters) for overhaul fill 📐 Dimensions Exterior Length: 197.4 inches (5014 mm) Width: 71.7 inches (1821 mm) Height: 55.5 inches (1410 mm) Wheelbase: 112.2 inches (2850 mm) Weights Curb Weight: Approx. 3,737 lbs (1695 kg) Gross Vehicle Weight Rating: Approx. 4,762 lbs (2160 kg) 🛡️ Safety Features Ratings NHTSA Frontal Impact Driver Rating: Not rated for 1998 model year (pre-dates standardized testing). Active Features ABS: Standard (Anti-lock Braking System) Traction Control: Available (Traction Control System - TCS) Passive Features Airbags: Driver and front passenger airbags Seatbelts: 3-point front and rear seatbelts, pretensioners for front seats 💡 Technology Features Infotainment Audio System: Bose premium audio system (often with cassette and CD player) Navigation: Optional factory navigation system available on some models. Driver Assistance Cruise Control: Standard cruise control Keyless Entry: Available keyless entry system 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3 months (whichever comes first) under normal driving conditions; refer to manual for severe driving conditions. Engine Air Filter Replacement: Every 15,000 miles or 12 months Spark Plug Replacement: Every 60,000 miles (Iridium-tipped spark plugs) Transmission Fluid Change: Every 30,000 miles or 24 months Fluid Specifications Brake Fluid Type: DOT 3 Power Steering Fluid Type: Nissan Genuine Power Steering Fluid or Dexron III compatible ATF Known Issues Common Wear Items: Age-related degradation of suspension bushings, fuel pump failure, ignition coil failures, ABS sensor issues, catalytic converter failure, window regulator issues. Common Diagnostics: P0300 (random misfire), P0171/P0174 (system too lean), ABS warning lights, check engine light related to O2 sensors or EVAP system. 📚 Vehicle History...