🏷️ Basic Information Identification Make: Infiniti Model: G20 Year: 1991 Codes Chassis Code: P10 👋 Introduction Market Position Vehicle Segment: Compact executive sedan, positioned as a premium alternative to mainstream Japanese and American sedans of the era. Competitive Analysis Key Competitors: Acura Integra, Honda Civic Si, Toyota Corolla GT-S, Mazda 323 GTX, Ford Escort GT. Key Features Vehicle Selling Points: Sporty handling, refined interior, reliable SR20DE engine, available with manual or automatic transmissions, luxurious appointments for its class. Manual Value Proposition Benefit To Owner: Enables DIY repairs, saving money on labor costs, and providing a deeper understanding of vehicle maintenance and operation. 📋 Manual Details Coverage Areas Systems Covered Overview: Comprehensive coverage of all major mechanical, electrical, and body systems for the 1991 Infiniti G20. Page Count Estimated Page Count: Likely exceeds 1500 pages (typical for OE service manuals of this era). Manual Type Manual Format Type: Official Service and Repair Manual Software Language Language: English Format Digital Format: Online Software/Web-based Access 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed repair procedures for the SR20DE engine, including disassembly, inspection, assembly, timing belt, lubrication system, cooling system, and emissions controls. Fuel System: Fuel injection system diagnosis and repair, fuel pump, injectors, pressure regulator, and EVAP system. Drivetrain: Front-wheel drive system, including CV axles, differential, and hub bearings. Transmission: Coverage for both manual (e.g., RS5F30A) and automatic (e.g., RE4F03A) transmissions, including removal, installation, overhaul, and fluid specifications. Suspension And Steering: Front and rear suspension components (struts, control arms, bushings), power steering system diagnosis and repair, steering rack. Brakes: Front and rear brake systems, including disc brake component replacement (pads, rotors), hydraulic system diagnostics, ABS (if equipped), parking brake. Electrical System: Complete wiring diagrams, lighting systems, starting and charging systems, fuses, relays, and component testing. HVAC: Heating, ventilation, and air conditioning (HVAC) system service, including refrigerant handling, compressor, blower motor, and climate controls. Body And Interior: Exterior body panel repair, doors, windows, interior trim removal and installation, seat adjustments. Diagnostic Trouble Codes: Procedures for reading and interpreting diagnostic trouble codes (DTCs) for engine management and other systems. Procedures Included Maintenance Procedures: Regular maintenance tasks such as oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt adjustments. Repair Procedures: Detailed step-by-step repair instructions for virtually all mechanical and electrical components. Troubleshooting Guides: Systematic diagnostic procedures for identifying and resolving common and uncommon faults. Technical Depth Depth Of Coverage: Factory-level technical depth, suitable for professional technicians and experienced DIY enthusiasts. Covers everything from basic maintenance to complete engine and transmission overhauls. 📊 Manual Specifications File Format Digital File Type: Web-based software, accessible via internet browser. Likely utilizes proprietary software from RepairSurge. Print Quality Online Content Quality: High-quality, licensed OE material presentation. Searchable and easily navigable. Binding Type Digital Access Type: Subscription-based access for one year, with options for renewal. Paper Type Online Platform Compatibility: Compatible with PC, laptop, smartphone, and tablet via web browser. ⚙️ Engine Specifications Primary Engine Engine Code: SR20DE Engine Type: Inline 4-cylinder, DOHC, 16-valve Displacement: 1998 cc (2.0 Liters) Performance Horsepower: Approx. 140-145 hp @ 6400 rpm (varies slightly by market/spec) Torque: Approx. 130-132 lb-ft @ 4800 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline (87 octane recommended) 🔧 Transmission Standard Standard Transmission Type: 5-speed Manual Transmission (e.g., RS5F30A) Optional Optional Transmission Type: 4-speed Automatic Transmission (e.g., RE4F03A) Features Drive Type: Front-Wheel Drive (FWD) 📐 Dimensions Exterior Length: Approx. 176.8 inches (4490 mm) Width: Approx. 67.7 inches (1720 mm) Height: Approx. 54.5 inches (1385 mm) Wheelbase: Approx. 104.3 inches (2650 mm) Weights Curb Weight: Approx. 2800-3000 lbs (1270-1360 kg) depending on transmission and trim. 🛡️ Safety Features Ratings NHTSA Frontal Impact Rating: N/A (NHTSA testing protocols differed significantly in 1991; specific ratings may not be directly comparable to modern standards.) Active Features ABS: Anti-lock Braking System (ABS) was often an optional feature on higher trims or specific packages. Passive Features Airbags: Driver-side airbag was standard; passenger airbag was optional or unavailable depending on the market and specific model year update. Seatbelts: Three-point seat belts for all outboard seating positions. 💡 Technology Features Infotainment Audio System: Factory cassette player with AM/FM radio, often with premium speaker options. CD player may have been optional on higher trims. Driver Assistance Cruise Control: Standard on most trims, providing consistent highway cruising. Connectivity Original Connectivity: No modern connectivity features like Bluetooth or USB; basic radio and auxiliary input (if equipped). 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 3 months (or 7,500 miles/6 months with synthetic oil, consult manual for specifics). Timing Belt Replacement: Every 60,000 to 90,000 miles (critical maintenance item for SR20DE to prevent catastrophic engine damage). Fluid Specifications Engine Oil Type: API SG or SH, SAE 5W-30 or 10W-30 (consult manual for temperature-specific recommendations). Coolant Type: Nissan Genuine Super Long Life Coolant...