🏷️ Basic Information Identification Make: BMW Model: 320i Chassis Code: E30 Production Years Covered: 1987, 1988, 1989, 1990, 1991 Codes Engine Code Common: M20B20 👋 Introduction Market Position Positioning: The BMW E30 320i represented a cornerstone of BMW's compact executive sedan segment in the late 1980s and early 1990s, known for its sporty handling and refined engineering. Competitive Analysis Competitors: Competed with vehicles such as the Mercedes-Benz 190E, Audi 80/90, and upscale models from brands like Alfa Romeo and Saab. Key Features Handling: Renowned for its balanced chassis, rear-wheel-drive dynamics, and communicative steering, providing an engaging driving experience. Reliability: Generally considered reliable with proper maintenance, a testament to BMW's engineering at the time. Build Quality: Exceptional build quality and interior materials for its class. Manual Purpose Purpose: Empowers owners and technicians to perform all necessary maintenance, repair, and diagnostic tasks efficiently and accurately. 📋 Manual Details Coverage Areas Primary Coverage: Service and Repair Secondary Coverage: Maintenance, Troubleshooting, Diagnostics Page Count Estimated Pages: Varies by specific publication, typically 1000+ for comprehensive factory manuals Manual Type Type: Factory Service/Repair Manual Language Language: English (assumed based on common availability for this model in English-speaking markets) Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Complete overhaul, diagnostics, fuel injection (Bosch L-Jetronic/Motronic), ignition system, cooling, lubrication, exhaust Transmission: Manual and Automatic: overhaul, fluid changes, diagnostics, clutch service, driveshaft Suspension: Front and rear suspension components, shock absorbers, springs, control arms, bushings, alignment specifications Brakes: Disc brakes (front and rear), hydraulic system, parking brake, ABS (if equipped), fluid specifications, bleeding procedures Electrical System: Wiring diagrams, component testing, alternator, starter, battery, lighting, fuse box, relays, control units Body And Chassis: Body panels, doors, windows, interior trim, chassis components, corrosion protection HVAC: Heating, Ventilation, and Air Conditioning system diagnosis and repair Fuel System: Fuel pump, injectors, fuel filter, fuel lines, fuel tank, evaporative emissions control Steering: Power steering system, steering rack, tie rods, steering column. Wheels Tires: Wheel specifications, bolt patterns, tire pressure recommendations, and tire size fitment. Lighting: Headlights, taillights, interior lights, fog lights (if equipped), bulb types and replacement. Instrument Panel: Gauges, warning lights, and their diagnostic interpretation. Procedures Included Maintenance: Oil changes, filter replacements, spark plug replacement, fluid checks, belt inspection and replacement Troubleshooting: Diagnostic charts, symptom-based troubleshooting for various systems Repair: Step-by-step instructions for component replacement and repair of all major systems Diagnostics: Detailed diagnostic procedures for engine, electrical, and mechanical issues Overhaul: Complete engine and transmission overhaul procedures Alignment: Specific alignment angles (camber, caster, toe) and adjustment procedures. Engine Timing: Ignition timing adjustment and verification procedures for the M20 engine. Recalibration: Procedures for recalibrating sensors and control units where applicable. Technical Depth Depth: Comprehensive: from basic maintenance to complete engine rebuilds and advanced electrical diagnostics Electrical Diagrams: Includes detailed, often color-coded, electrical wiring diagrams for all major vehicle systems. 📊 Manual Specifications File Format Compatibility: Adobe Acrobat Reader or compatible PDF viewer Searchable: Typically yes, if the PDF is generated from a well-indexed source, allowing for keyword searches of technical terms and procedures. Print Quality Quality: High resolution, suitable for printing Binding Type Type: Not Applicable (Digital Download) Paper Type Type: Not Applicable (Digital Download) ⚙️ 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 (typical) Performance Horsepower: Approx. 125-129 hp @ 6000 rpm Torque: Approx. 165-170 Nm (122-125 lb-ft) @ 4300 rpm Fuel System Injection System: Bosch L-Jetronic or Motronic (depending on specific year/market) Fuel Type: Unleaded gasoline Cooling Cooling System: Liquid-cooled, pressurized system with fan Lubrication Oil Capacity: Approx. 4.5 - 5.0 liters (with filter) Other Engine Management: ECU controlled ignition and fuel injection 🔧 Transmission Standard Type: Getrag 260 5-speed manual transmission Optional Type: ZF 4HP22 4-speed automatic transmission Features Clutch Type: Single dry plate, hydraulic actuation (manual) Fluid Specifications Manual Fluid: BMW MTF LT-2 or equivalent (e.g., Pentosin ATF 1100) Automatic Fluid: Dexron III (or equivalent) 📐 Dimensions Exterior Length: Approx. 4325 mm (170.3 in) Width: Approx. 1675 mm (65.9 in) Height: Approx. 1380 mm (54.3 in) Wheelbase: Approx. 2570 mm (101.2 in) Weights Curb Weight: Approx. 1200-1300 kg (2645-2866 lbs), depending on options 🛡️ Safety Features Ratings Crash Test Data: No standardized NCAP ratings from that era, but generally considered safe for its time with a robust chassis. Active Features ABS: Optional anti-lock braking system (ABS) Passive Features Airbags: Driver-side airbag typically optional or introduced later in the production run; passenger airbags not common. Seatbelts: 3-point front seatbelts, 2-point rear lap belts (later models may have 3-point rear belts) 💡 Technology Features Infotainment Audio System: Factory fitted cassette player or radio, often with limited speaker configurations. Aftermarket head units are common upgrades. Driver Assistance ABS: As mentioned, ABS was an optional safety feature, enhancing braking control. Connectivity Connectivity: No modern connectivity features...