🏷️ Basic Information Identification Make: BMW Model: 3 Series Model Variant: 320i Chassis Code: E30 Production Years Covered: 1987, 1988, 1989, 1990, 1991 Codes Engine Code Typical: M20B20 👋 Introduction Market Position Market Position: The BMW 3 Series (E30) represented BMW's commitment to sporty, driver-focused sedans and coupes in the compact executive segment. The 320i was a popular entry-level model, offering a balance of performance and efficiency. Competitive Analysis Competitive Analysis: Competed against vehicles like the Mercedes-Benz 190E, Audi 80/90, and Ford Sierra during its production run. Key Features Key Features: Rear-wheel drive platform, renowned BMW handling, robust build quality, versatile sedan and coupe body styles, efficient (for its time) inline-four engines. 📋 Manual Details Coverage Areas Coverage Areas: Complete repair and maintenance for BMW 3 Series (E30) 320i models from 1987-1991. Page Count Page Count: 225 Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format Format: PDF (Digital Download) 📖 Manual Coverage Systems Covered Systems Covered: Engine mechanical, engine electrical, fuel system, cooling system, exhaust system, ignition system, lubrication system, transmission (manual & automatic), drivetrain, suspension, steering, brakes (hydraulic & pneumatic), body and chassis, interior trim, heating and air conditioning, electrical system (wiring diagrams, components), diagnostics and troubleshooting. Procedures Included Procedures Included: Routine maintenance, scheduled maintenance, troubleshooting, diagnostics, component removal and installation, complete engine overhaul, transmission repair, brake system bleeding and service, suspension component replacement, steering system repair, electrical system diagnosis and repair, body panel alignment and repair, HVAC system servicing. Technical Depth Technical Depth: Comprehensive from basic fluid changes and inspections to complete engine, transmission, and chassis overhauls. Includes detailed diagnostic procedures and repair instructions for advanced troubleshooting. 📊 Manual Specifications File Format File Format: Searchable PDF Print Quality Print Quality: High-resolution scans suitable for printing individual pages or the entire manual. Binding Type Binding Type: Digital Download (Not Applicable) Paper Type Paper Type: Digital Download (Not Applicable) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder, naturally aspirated Engine Code: M20B20 Displacement: 1990 cc (2.0 Liters) Performance Horsepower: 125-129 hp (approximate, depending on market and specific tuning) Torque: 174-180 Nm (approximate, depending on market and specific tuning) Fuel System Fuel System: Bosch L-Jetronic or Motronic fuel injection Fuel Type: Unleaded Gasoline (Premium recommended) Maintenance Spark Plug Type: NGK BPR6ES or equivalent Valve Lash Adjustment: Required periodically (specific interval in manual) 🔧 Transmission Standard Standard Transmission: Getrag 260 5-speed manual Optional Optional Transmission: ZF 4HP22 4-speed automatic Features Transmission Fluid Type Manual: GL-4 gear oil (e.g., Castrol EP 80W-90) Transmission Fluid Type Automatic: Dexron II or III (refer to manual for exact specification) 📐 Dimensions Exterior Wheelbase: 2570 mm (101.2 in) Length: 4325 mm (170.3 in) Width: 1640 mm (64.6 in) Height: 1380 mm (54.3 in) Weights Curb Weight Approx: 1180 - 1250 kg (2600 - 2755 lbs) Gross Vehicle Weight Rating Approx: 1630 kg (3594 lbs) Wheels Tires Wheel Bolt Pattern: 5x120mm Standard Wheel Size: 14x6.0 inches Standard Tire Size: 195/60R14 🛡️ Safety Features Ratings Safety Ratings Era: While official crash test ratings from modern organizations like NHTSA or IIHS are not readily available for this era and model, BMW's E30 chassis was known for its robust unibody construction and front crumple zones. Active Features Active Features: Four-wheel disc brakes (ventilated fronts), limited-slip differential (optional), anti-lock braking system (ABS) (optional on later models). Passive Features Passive Features: Crumple zones (front and rear), reinforced passenger cell, seat belts, padded dashboard and steering wheel. 💡 Technology Features Infotainment Infotainment Features: Typically basic AM/FM radio with cassette player. Optional features might include upgraded sound systems. Driver Assistance Driver Assistance Features: Limited by era; ABS and limited-slip differential were the primary advanced driver aids, often optional. Connectivity Connectivity Features: No modern connectivity features like Bluetooth or USB. External media adapters might be available for cassette players. 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500-10,000 miles or 6-12 months (refer to manual for specific recommendations). Spark Plug Replacement: Every 30,000 miles (refer to manual for specific recommendations and plug type). Timing Belt Replacement: Critical component for M20 engine. Typically every 60,000 miles or 5 years. Failure can cause catastrophic engine damage. Manual will provide precise interval and procedure. Fluid Specifications Engine Oil Type: API SG or higher, SAE 10W-40 or 15W-40 (check manual for exact viscosity and capacity). Coolant Type: Ethylene glycol based antifreeze (BMW blue or equivalent). Brake Fluid Type: DOT 3 or DOT 4. Known Issues Known Issues: Cooling system (water pump, radiator, hoses), fuel distributor diaphragm (M20 engine), door seal leaks, rust (especially around wheel arches and rocker panels), idle control valve issues, fuel pump reliability. Parts Numbers Oil Filter Part Number Typical: Mann-Filter W917, Mahle OC 26 Air Filter Part Number Typical: Mann-Filter C35153/2 📚 Vehicle History Brand Heritage Brand Heritage: BMW, Bayerische Motoren Werke AG, has a long history of producing high-performance, driver-oriented...