🏷️ Basic Information Identification Make: Porsche Model: 911 Carrera 4 Year: 1990 Codes Chassis Code: 964 👋 Introduction Market Position Target Audience: Do-it-yourselfer and experienced mechanic Key Features Content Highlight: Hundreds of photos and illustrations Content Benefit Value Proposition: Inexpensive way to keep vehicle working properly Delivery Method Delivery: Instant Download 📋 Manual Details Coverage Areas All Styles Covered: True Page Count Estimated Pages: Hundreds Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered General Maintenance: True Troubleshooting: True Engine Service Repair: True Transmission Service Repair: True Brake System: True Wiring Diagrams: True Electrical System: True Suspension: True Periodic Lubrication: True Steering: True Cooling System: True Fuel Injection: True Fuel System: True Emission System: True Heater Air Conditioning: True Engine Control System: True Chassis Body: True Restraint System: True Interior: True Differential Drive: True Axle: True Procedures Included Step By Step Instructions: True Detailed Substeps: True Notes Cautions Warnings: True Troubleshooting Procedures: True Electrical Service Procedures: True Technical Depth Depth: Complete disassembly of the machine 📊 Manual Specifications File Format File Format: PDF Print Quality Printable: Without any restriction Binding Type Binding Type: Digital Download (printable) Paper Type Paper Type: Not Applicable (Digital) Software Requirements Reader Requirement: Adobe PDF Reader ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Flat-Six (Boxer) Performance Displacement Liters: 3.6 Engine Code Family: M64 Fuel System Fuel Delivery: Bosch Motronic Fuel Injection 🔧 Transmission Standard Transmission Type: 5-speed Manual (G50) Optional Transmission Type: Tiptronic (early versions, not standard on Carrera 4 for this year) Features Drive System: All-Wheel Drive (Porsche Traction Management - PTM) 📐 Dimensions Exterior Body Style: Coupe Weights Curb Weight Kg Approx: 1450-1500 🛡️ Safety Features Passive Features Airbags: Driver airbag (standard) Seatbelts: 3-point inertia-reel seatbelts with pretensioners 💡 Technology Features Infotainment Audio System: Original Porsche/Becker cassette radio with optional CD changer Driver Assistance ABS: Yes (Standard) Traction Control: Yes (part of the AWD system) 🔧 Maintenance Service Intervals Oil Change Interval Km: 10,000 - 15,000 (approximate, consult manual) Major Service Interval Km: 30,000 - 50,000 (approximate, consult manual) Fluid Specifications Engine Oil Type: Synthetic SAE 15W-50 or 10W-40 (refer to manual for exact Porsche A40 or equivalent) Brake Fluid Type: DOT 4 (high-performance) Transmission Fluid Type: GL-5 Gear Oil (specific viscosity as per manual) Known Issues Common Concern 1: Rear main seal (RMS) leaks Common Concern 2: Valve oil leaks (e.g., valve cover gaskets) Common Concern 3: Brake caliper piston seizing (especially if not regularly used) Common Concern 4: Climate control system (HVAC) blower motor resistor failure 📚 Vehicle History Brand Heritage Brand Focus: Performance sports cars Model Evolution Generation: 964 (1989-1994) Introduction Context: Successor to the 911 G-Series, significant redesign with over 85% new parts. Carrera 4 Significance: Marked the return of the 911 with All-Wheel Drive, providing enhanced stability and traction. 🏆 Awards & Recognition Recognitions Automotive Journal Rating: Consistently praised for handling and performance, though initial critiques focused on styling compared to G-Series.