🏷️ Basic Information Identification Make: BMW Model: 320i Year: 1990 Generation Chassis Code: E30 Codes Engine Code Variant: M20B20 👋 Introduction Market Position Segment: Compact Executive Sedan/Coupe Target Audience: Enthusiasts, DIY mechanics, professional repair shops seeking detailed technical information for the E30 generation 3 Series. Competitive Analysis Key Competitors 1990: Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, Saab 900. Key Features Brand Philosophy: BMW's focus on 'Ultimate Driving Machine,' characterized by sporty handling, responsive engines, and driver-centric design. Vehicle Strengths: Excellent chassis dynamics, reliable powertrain (with proper maintenance), build quality, iconic design. 📋 Manual Details Coverage Areas Full Model Coverage: All 1990 BMW 320i models, including all engine, transmission, and trim variations. Page Count Estimated Page Count: 500+ Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, cylinder head, pistons, crankshaft, camshaft, timing, lubrication system, cooling system, fuel system (carburetor/early injection), exhaust system. Engine Electrical: Ignition system, starter, alternator, fuel injection (if applicable), engine control unit (ECU), sensors, wiring diagrams. Transmission Drivetrain: Manual and automatic transmission service, clutch, driveshaft, differential, axles. Suspension Steering: Front and rear suspension components, steering system, power steering, wheel alignment. Brakes: Brake system components (discs, pads, calipers, master cylinder, lines), ABS (if equipped), parking brake. Electrical Systems: Lighting, interior electronics, instrumentation, fuses, relays, battery, charging system, starter motor. Body Chassis: Body panels, doors, hood, trunk, glass, interior trim, chassis components, corrosion protection. Heating Ventilation Air Conditioning: HVAC system components, controls, refrigerant system (if applicable). Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, fluid checks and changes, belt inspections and replacement. Troubleshooting: Diagnostic procedures for common drivability issues, electrical faults, and mechanical problems, including symptom analysis and fault code interpretation (if applicable). Repair Rebuild: Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation of major systems. Diagnostics: Component testing procedures, electrical circuit diagnostics, using test equipment like multimeters and oscilloscopes. Specifications Data: Torque specifications, clearances, fluid capacities, wiring diagrams, component data. Technical Depth Depth Of Information: Comprehensive, covering everything from basic adjustments to complete engine and transmission overhauls. 📊 Manual Specifications File Format PDF Quality: High-resolution, searchable PDF with clear text and images. Print Quality Printability: Printable pages for convenient workshop use. Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-Cylinder, SOHC (M20B20) Displacement: 1990 cc (2.0 Liters) Performance Horsepower Ps: 129 PS @ 5800 rpm (approximate, may vary by market) Torque Nm: 174 Nm @ 4000 rpm (approximate, may vary by market) Fuel System Fuel Delivery: Bosch L-Jetronic Fuel Injection (primarily) or Carburetor in some markets. Recommended Octane: 91-95 RON (Research Octane Number) Lubrication Oil Type: API SG or higher, SAE 15W-40 or 10W-40 (refer to manual for specific BMW approval) Oil Capacity Liters: 4.25 Liters (with filter) Cooling System Coolant Type: BMW Blue Antifreeze/Coolant (G48 standard) Coolant Capacity Liters: 7.5 Liters (approximate) 🔧 Transmission Standard Transmission Type: Getrag 260 5-speed Manual Transmission Optional Transmission Type: ZF 4HP22 4-speed Automatic Transmission Features Manual Fluid Type: BMW MTF LT-2 or equivalent (e.g., Red Line MTL) Automatic Fluid Type: Dexron III (or compatible ATF) Manual Capacity Liters: 1.4 Liters (Getrag 260) Automatic Capacity Liters: 6.0 Liters (ZF 4HP22, dry fill) 📐 Dimensions Exterior Length Mm: 4345 mm Width Mm: 1670 mm Height Mm: 1380 mm Wheelbase Mm: 2570 mm Weights Curb Weight Kg: 1250 kg (approximate, varies with equipment) Gross Vehicle Weight Rating Kg: 1700 kg (approximate) 🛡️ Safety Features Ratings Historical Safety Perception: E30 generation known for solid build and predictable handling, though modern safety standards were less stringent. Active Features ABS: Optional ABS (Anti-lock Braking System) available on some models. Traction Control: Not typically available on 320i models of this year. Passive Features Airbags: Driver's side airbag optional; passenger airbag not available. Seatbelts: Three-point inertia reel seatbelts in front and rear. Body Structure: Reinforced safety cage, crumple zones. 💡 Technology Features Infotainment Audio System: Factory AM/FM cassette player with optional premium sound system. Speakers: Typically 4-6 speakers depending on trim and options. Driver Assistance Cruise Control: Optional. Trip Computer: Rarely equipped on base 320i models; more common on higher trims or later revisions. Connectivity Bluetooth: Not factory equipped. Aux Input: Not factory equipped; aftermarket solutions often available. 🔧 Maintenance Service Intervals Oil Change: Every 7,500 - 10,000 miles or 12 months (synthetic oil recommended for longer intervals). Air Filter: Inspect every 15,000 miles, replace as needed or every 30,000 miles. Spark Plugs: Replace every 30,000 miles (check manual for specific plug type). Coolant Flush: Every 2-3 years or 30,000 miles. Transmission Fluid: Manual: Inspect every 30,000 miles, change if discolored or contaminated. Automatic: Change every 50,000-60,000 miles. Fluid Specifications Brake Fluid: DOT 3 or DOT 4. Power Steering Fluid: ATF Dexron II/III...