🏷️ Basic Information Identification Make: BMW Model: 3-Series Chassis Code: E30 Model Variant: 320i Codes Engine Code Range: M20B20 👋 Introduction Market Position E30 Significance: The E30 3-Series cemented BMW's reputation for building driver-focused, robust, and luxurious compact executive cars. The 320i was a popular entry-level model in many markets, offering the signature BMW driving experience. Competitive Analysis Contemporaries: Competed against models like the Mercedes-Benz 190E, Audi 80/90, and various sporty sedans from brands like Alfa Romeo and Ford. Key Features E30 Dna: Balanced chassis, rear-wheel drive, refined inline-six engines (though 320i uses an inline-four), quality interior materials, and sporty design. Manual Value Proposition Target Audience: Ideal for BMW E30 owners, independent repair shops, and automotive enthusiasts looking for detailed service and repair information for the 320i variant. 📋 Manual Details Coverage Areas Vehicle Years Covered: 1987, 1988, 1989, 1990, 1991 Specific Models Covered: BMW 320i (E30) Page Count Estimated Page Count: 500+ Manual Type Type: Service and Repair Manual Language Language: English Format Format: Digital (PDF) 📖 Manual Coverage Systems Covered Engine: Full engine overhaul, tuning, diagnostics, lubrication system, cooling system, fuel injection system (Bosch LE-Jetronic), exhaust system, engine management. Transmission: Manual transmission (Getrag 260) overhaul, clutch, driveshaft, differential, automatic transmission (optional, if applicable to 320i E30 in specified years) overhaul. Brakes: Front disc brakes, rear disc brakes (if equipped), parking brake, hydraulic system, ABS (if equipped). Suspension: Front MacPherson struts, rear semi-trailing arms, shock absorbers, springs, bushings, steering linkage. Electrical: Complete wiring diagrams, lighting system, ignition system, starting system, charging system, instruments, gauges, interior electronics, fuse box layout. Bodywork: Exterior body panels, doors, hood, trunk, glass, seals, interior trim, body repair procedures. Procedures Included Maintenance: Oil change, filter replacement, coolant flush, spark plug replacement, belt tensioning, brake pad replacement, fluid checks. Troubleshooting: Diagnostic flowcharts for common problems, electrical system diagnostics, engine performance issues, starting difficulties. Repair: Step-by-step repair instructions for all major components, component removal and installation, rebuilding procedures. Technical Specifications: Torque specifications, clearances, fluid capacities, timing settings, alignment data. Technical Depth Depth: Comprehensive, covering routine maintenance to complete engine and transmission rebuilds, including electrical diagnostics. Detail Level: Detailed exploded views, diagrams, and step-by-step instructions. 📊 Manual Specifications File Format Digital Format: Searchable PDF with high-resolution diagrams. Print Quality Print Readability: Designed for clear printing of all text and diagrams. Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, naturally aspirated Engine Code: M20B20 Displacement: 1990 cc (2.0 Liters) Bore X Stroke: 80.0 mm x 99.0 mm Compression Ratio: 8.8:1 (typical) Performance Horsepower: 129 PS (127 hp; 95 kW) @ 5800 rpm (approximate) Torque: 174 Nm (128 lb-ft) @ 4500 rpm (approximate) Fuel System Fuel Delivery: Bosch LE-Jetronic Fuel Injection Fuel Type: Unleaded Gasoline (RON 91-98) Ignition System Ignition Type: Electronic Ignition System (e.g., Bosch Motronic M1.3, depending on year) 🔧 Transmission Standard Transmission Type: 5-speed Manual Manual Gearbox Code: Getrag 260 Optional Automatic Transmission Available: Yes (typically 4-speed Automatic, ZF 4HP22) Features Drivetrain: Rear-Wheel Drive (RWD) Fluid Specs Manual Transmission Fluid: BMW MTF LT-2 or equivalent (GL-4 rated, 75W-90) Automatic Transmission Fluid: Dexron III or equivalent 📐 Dimensions Exterior Wheelbase: 2565 mm (101.0 in) Length: 4330 mm (170.5 in) Width: 1640 mm (64.6 in) Height: 1380 mm (54.3 in) Weights Curb Weight: 1150 kg (2535 lbs) approx. Gross Vehicle Weight: 1600 kg (3527 lbs) approx. Cargo Trunk Volume: 420 Liters (14.8 cu ft) approx. 🛡️ Safety Features Ratings Crash Test Standards: E30 models predate modern rigorous crash testing standards, but built to robust European safety standards of the era. Active Features ABS: Optional on some 320i models, particularly later production years. Passive Features Airbags: Driver's airbag typically optional or unavailable on early E30s, may have been introduced on later models. Seatbelts: 3-point seat belts front and rear. Crumple Zones: Designed with front and rear crumple zones for improved impact absorption. 💡 Technology Features Infotainment Audio System: Factory original cassette player or AM/FM radio, often with optional amplifier. Later models might have CD compatibility. Manual will cover diagnostics and speaker replacement. Driver Assistance ABS: Optional ABS system troubleshooting and component identification. Connectivity E30 Era Tech: Limited by modern standards. Focus is on mechanical and basic electrical systems. Manual may cover power windows, mirrors, and central locking if equipped. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500 - 10,000 miles or 12 months (refer to manual for specific recommendation based on driving conditions). Spark Plug Replacement: Every 30,000 - 50,000 miles (depending on plug type). Timing Belt Replacement: Critical for M20 engine. Interval usually around 60,000 miles or 4-5 years. Manual will specify precise interval and procedure. Fluid Specifications Engine Oil Specification: BMW Longlife-98 or equivalent (e.g., 5W-40, 10W-40 depending on climate). Coolant Type: Glysantin G48 (blue) or equivalent; BMW Blue Antifreeze/Coolant. Brake Fluid...