🏷️ Basic Information Identification Make: BMW Model: 320i Year: 1988 Codes Chassis Code: E30 Engine Code: M20B20 👋 Introduction Market Position Segment: Compact Executive/Sport Sedan Target Audience: Enthusiasts, independent repair shops, DIY mechanics seeking comprehensive repair information for the E30 320i. Competitive Analysis Competitors: Mercedes-Benz W201 (190E), Audi 80/90, Volvo 240, Alfa Romeo 75 Key Features Driving Dynamics: Renowned for its balanced chassis, rear-wheel-drive dynamics, and driver-focused cockpit. Build Quality: Typical BMW build quality of the era, known for durability and longevity when properly maintained. 📋 Manual Details Coverage Areas Manual Type: Workshop Repair Service Manual Coverage Scope: All Models, Engines, Trim, Transmission Types for 1988 BMW 320i (E30 chassis) Language: English Format: PDF Download Page Count Estimated Page Count: 1000+ 📖 Manual Coverage Systems Covered Powertrain: Engine, Fuel System, Ignition System, Cooling System, Exhaust System, Transmission (Manual & Automatic), Drivetrain (Rear Axle, Driveshaft) Chassis: Suspension (Front & Rear), Steering System, Brakes (Front Disc, Rear Drum/Disc), Wheels & Tires Electrical: Wiring Diagrams, Lighting System, Gauges & Instruments, Power Accessories, Starter & Charging System, Engine Control Unit (ECU) & Sensors Body: Body Panels, Doors, Windows, Locks, Bumpers, Interior Trim, HVAC System Climate Control: HVAC system diagnosis and repair, including blower motor, heater core, evaporator, and refrigerant system (where applicable for the era). Procedures Included Maintenance: Oil Changes, Filter Replacements, Spark Plug Service, Coolant Flushes, Belt Adjustments/Replacement, Brake Fluid Flush, Tune-Ups Repair: Engine Overhaul, Transmission Rebuild, Suspension Component Replacement, Brake System Repairs, Electrical Component Diagnosis and Replacement, Body Panel Repair and Refinishing Troubleshooting: Diagnostic procedures for engine performance issues, electrical faults, HVAC problems, brake system malfunctions, and more, often with flowcharts and symptom-based guides. Diagnostics Procedures: Includes diagnostic flowcharts, troubleshooting guides for common faults, and component testing procedures. Technical Depth Diagnostic Level: Advanced diagnostics, including ECU fault code retrieval (where applicable for the era), sensor testing, and circuit analysis. Rebuild Procedures: Comprehensive rebuild procedures for major components like the engine, transmission, and differential, including torque specifications, clearances, and assembly sequences. Special Tools: Identification and usage of specific BMW special tools required for various repair and maintenance procedures. Torque Specifications: Detailed torque specifications for all critical fasteners and assemblies. 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text content within the PDF for quick information retrieval. Printability: Printable pages for hands-on workshop use. Print Quality Image Resolution: High-resolution images, diagrams, and schematics. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) Manual Type Document Type: Comprehensive Service and Repair Manual ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-cylinder, SOHC Displacement: 1990 cc (2.0 Liters) Bore X Stroke: 80.0 mm x 66.0 mm Compression Ratio: 8.8:1 Engine Management: Bosch L-Jetronic Fuel Injection and Ignition System Performance Horsepower: 125 hp (93 kW) @ 6000 rpm (approx.) Torque: 174 Nm (128 lb-ft) @ 4300 rpm (approx.) Fuel System Fuel Delivery: Bosch LE-Jetronic Electronic Fuel Injection Fuel Type: Unleaded Gasoline (Premium Recommended) Fuel Pump Pressure: Refer to manual for specific pressure specifications (typically 3-5 bar). 🔧 Transmission Standard Transmission Type: 4-Speed Manual Optional Transmission Type: 3-Speed Automatic (Optional) Features Clutch Type: Single Dry Plate, Hydraulically Operated Transmission Fluid Spec: Refer to manual for specific ATF (automatic) or gear oil (manual) specifications and quantities. 📐 Dimensions Exterior Wheelbase: 2570 mm (101.2 inches) Length: 4325 mm (170.3 inches) Width: 1675 mm (66.0 inches) Height: 1380 mm (54.3 inches) Weights Curb Weight: Approx. 1200 kg (2645 lbs) - varies by equipment Gross Vehicle Weight Rating: Refer to vehicle VIN plate for specific GVWR. 🛡️ Safety Features Ratings Crash Test Data: Limited official crash test data available for this model year from major agencies like NHTSA/Euro NCAP compared to modern standards. Refer to historical safety reviews for qualitative assessments. Active Features ABS: Anti-lock Braking System (ABS) available as an option on some models, particularly later E30s and specific export markets. Passive Features Seatbelts: Three-point seatbelts in the front, two-point lap belts in the rear. Structure: Reinforced safety cell, crumple zones. 💡 Technology Features Infotainment Radio: Typically a Blaupunkt or Becker radio with AM/FM and cassette player. Basic analog tuning and volume controls. Speakers: Standard speaker configuration, often front door and rear parcel shelf. Upgrades may be available depending on trim. Driver Assistance ABS: As mentioned in safety, ABS was an option, not standard across all 1988 320i models. Cruise Control: Optional on some models, typically vacuum-operated. Connectivity Connectivity Features: No modern connectivity features (e.g., Bluetooth, USB, smartphone integration) as standard. Focus is on analog systems. 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 - 10,000 miles (12,000 - 15,000 km) or annually, whichever comes first (recommend consulting manual for precise interval based on driving conditions). Air Filter Replacement: Every 15,000 - 30,000 miles (24,000 - 48,000 km). Spark Plug Replacement: Every 20,000 - 30,000 miles (32,000 - 48,000 km) for standard plugs. Refer to...