🏷️ Basic Information Identification Make: BMW Model: 320i Chassis Code: E30 Model Years Covered: 1987-1991 Generation E30 Generation Details: The E30 generation, produced from 1982 to 1994 (with the 320i primarily in the later years), is renowned for its balanced chassis, engaging driving dynamics, and iconic design. The 1987-1991 models represent a refinement of the original E30, often featuring updated styling and engines. Codes Engine Codes: M20B20 👋 Introduction Market Position E30 Market Position: The E30 3 Series, particularly the 320i, occupied the premium compact executive sedan and coupe segment, known for its superior driving dynamics and build quality compared to many competitors. Competitive Analysis Key Competitors: Competed with vehicles such as the Mercedes-Benz W201 (190E), Audi 80/90, Alfa Romeo 75, and various Japanese luxury sedans of the era. Key Features Driving Dynamics: Renowned for its near-perfect weight distribution, rear-wheel drive chassis, and responsive steering, offering an engaging driving experience. Build Quality: Exceptional build quality and durability, characteristic of BMW's reputation. Design Icon: Timeless design penned by Claus Luthe, considered an automotive icon. Manual Value Proposition Professional Level: This manual provides the same depth of information that BMW dealership technicians would use, empowering owners to perform comprehensive maintenance and repairs. 📋 Manual Details Coverage Areas All Models Covered: Yes, all E30 320i variants within the specified years. Repair Coverage: A-Z (from basic maintenance to major overhauls) Page Count Estimated Page Count: N/A (digital format, extensive detail) Manual Type Manual Type: Service Repair Workshop Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed breakdown of the M20B20 engine, including cylinder head, block, crankshaft, pistons, connecting rods, timing system, lubrication, and cooling. Engine Management: Bosch L-Jetronic fuel injection system, ignition system, sensors, actuators, and ECU diagnostics. Fuel System: Fuel tank, pump, lines, injectors, pressure regulator, and evaporative emissions control. Exhaust System: Exhaust manifold, catalytic converter (if applicable to market), mufflers, and piping. Transmission: Manual (Getrag 260) and automatic (ZF 4HP22) transmission overhaul, clutch, driveline, and differential. Suspension: Front MacPherson struts, rear semi-trailing arms, springs, dampers, bushings, and alignment specifications. Steering: Steering rack, tie rods, power steering system (if equipped), and steering column. Brakes: Front ventilated discs, rear solid discs (or drums on some early models), hydraulic system, ABS (if equipped), parking brake, and component replacement. Electrical System: Battery, charging system (alternator, starter), lighting, wipers, horn, instruments, and wiring diagrams. HVAC: Heating, ventilation, and air conditioning system operation, diagnosis, and repair. Body And Chassis: Body panels, doors, hood, trunk, interior trim, and structural components. Body Electrical: Power windows, door locks, mirrors, seats, and central locking systems. Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks, spark plug replacement, belt adjustments, and general inspections. Troubleshooting: Diagnostic procedures for common and uncommon issues across all systems, including symptom-based troubleshooting trees. Component Removal Installation: Step-by-step guides for removing and reinstalling virtually every mechanical and electrical component. Engine Rebuilding: Complete engine disassembly, inspection, measurement, and reassembly procedures. Transmission Overhaul: Detailed instructions for repairing and rebuilding both manual and automatic transmissions. Brake System Service: Bleeding procedures, pad/shoe replacement, caliper/wheel cylinder overhaul, and rotor replacement. Suspension And Steering Alignment: Adjustment and alignment procedures, including camber, caster, and toe. Electrical Diagnosis: Wiring diagrams, component testing, and diagnostic routines for electrical faults. Bodywork And Trim: Procedures for door panel removal, interior trim replacement, and minor body repair. Torque Specifications: Comprehensive list of all critical torque specifications for fasteners. Technical Depth Depth Of Coverage: Professional-level detail, suitable for experienced mechanics and dedicated DIY enthusiasts. Covers everything from basic fluid checks to complete engine and transmission rebuilds. Diagnostic Capabilities: Includes diagnostic procedures and troubleshooting flowcharts for identifying and resolving issues. Special Tools: References to specific BMW special tools required for certain procedures. 📊 Manual Specifications File Format File Type: PDF Searchability: Text-searchable PDF for quick access to information. Print Quality: High-resolution, suitable for printing individual pages or sections. Binding Type Binding For Digital: N/A (digital format) Paper Type Paper For Digital: N/A (digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Inline-6 Cylinder, SOHC Engine Code: M20B20 Displacement: 1990 cc (2.0 Liters) Bore X Stroke: 80.0 mm x 66.0 mm Performance Horsepower: Approx. 125-129 hp (DIN) @ 5800-6000 rpm (depending on market/year) Torque: Approx. 165-170 Nm (122-125 lb-ft) @ 4000 rpm (depending on market/year) Fuel System Fuel Delivery: Bosch L-Jetronic (or Motronic variations) Fuel Injection Fuel Type: Unleaded Gasoline (RON 91 or higher) Engine Management Ignition System: Distributor-based electronic ignition 🔧 Transmission Standard Standard Transmission: Getrag 260 5-speed Manual Transmission Optional Optional Transmission: ZF 4HP22 4-speed Automatic Transmission Features Clutch Type: Single dry plate diaphragm clutch (manual) Drivetrain: Rear-Wheel Drive Final Drive Ratio: Typically 3.64:1 or 3.91:1 (varies by transmission and differential option) 📐 Dimensions Exterior Length: Approx. 4325 mm (170.3 in) Width: Approx. 1680 mm (66.1 in) Height: Approx. 1380 mm (54.3 in) Wheelbase: Approx....