🏷️ Basic Information Identification Make: BMW Model: 3 Series Sub Model: 325i Model Years: 1987-1991 Codes Chassis Code: E30 👋 Introduction Market Position Positioning: The BMW 3 Series (E30) represented BMW's entry into the compact executive sedan market, offering a blend of sporty handling, refined engineering, and luxury. Competitive Analysis Competitors: Competed with vehicles like the Mercedes-Benz 190E, Audi 80/90, and Alfa Romeo 75. Key Features Driving Dynamics: Renowned for its balanced chassis, rear-wheel-drive platform, and engaging driving experience. Design Era: Classic, understated BMW design language of the era. Target Audience Audience: Enthusiasts, DIY mechanics, and owners seeking to maintain and repair their classic BMWs. 📋 Manual Details Coverage Areas Coverage Focus: Workshop service and repair Page Count Page Count: 225 Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Full overhaul, diagnosis, tuning, component replacement (M20B25) Engine Management: Fuel injection (Motronic), ignition system, sensors, actuators, troubleshooting Transmission Manual: Clutch, gearbox overhaul, shift linkage, maintenance Transmission Automatic: Service, fluid changes, troubleshooting, component replacement (if applicable to 325i models) Drivetrain: Driveshafts, universal joints, differential, axle shafts Suspension: Front and rear suspension components, shock absorbers, springs, control arms, bushings, alignment specifications Steering: Steering rack, power steering system, linkages, troubleshooting Brakes: Disc brakes (front and rear), hydraulic system, ABS (if equipped), bleeding, pad and rotor replacement, caliper service Electrical System: Battery, charging system, starter, lighting, wipers, horn, accessory circuits Body And Chassis: Body panels, doors, hood, trunk, interior trim, glass, seals Heating Ventilation Air Conditioning: HVAC system operation, component service, refrigerant handling (R12 typical) Exhaust System: Exhaust manifold, catalytic converter (if applicable), mufflers, pipes Fuel System: Fuel tank, fuel pump, fuel lines, injectors, fuel pressure regulation Cooling System: Radiator, thermostat, water pump, hoses, coolant specifications Interior Systems: Seats, seat belts, dashboard, instrumentation Procedures Included Maintenance Tasks: Oil changes, filter replacements, spark plug replacement, fluid level checks, lubrication Diagnostic Procedures: Troubleshooting charts, symptom analysis, fault code interpretation (where applicable) Repair Procedures: Step-by-step instructions for component removal, installation, and adjustment Rebuilding Procedures: Engine and transmission rebuild instructions with specifications Wiring Diagrams: Detailed electrical wiring schematics for various systems Specifications And Tolerances: Torque values, clearances, measurements for all components Technical Depth Depth: Comprehensive (from basic maintenance to full engine/transmission rebuilds) Diagnostic Capability: Advanced diagnostic procedures and troubleshooting guides Special Tools: Identification and use of specialized BMW tools required for certain procedures 📊 Manual Specifications File Format File Format: PDF Print Quality Resolution: High-resolution, suitable for printing Searchability: Likely text-searchable PDF for quick information retrieval Binding Type Binding Type: N/A (Digital PDF format) Paper Type Paper Type: N/A (Digital PDF format) Completeness Completeness: Full workshop manual, covering all major systems and repairs. ⚙️ Engine Specifications Primary Engine Engine Code: M20B25 Configuration: Inline 6-cylinder, SOHC Displacement: 2.5 liters (2494 cc) Performance Horsepower: 168 hp @ 5800 rpm (approximate, US spec) Torque: 225 Nm (166 lb-ft) @ 4300 rpm (approximate, US spec) Fuel System Fuel Delivery: Bosch Motronic electronic fuel injection (EFI) Fuel Type: Unleaded gasoline (Premium Octane recommended) Cooling System Coolant Type: Ethylene glycol-based coolant, typically a 50/50 mix with distilled water. Ignition System Ignition Type: Electronic ignition with distributor and coil 🔧 Transmission Standard Type: Getrag 260 5-speed manual transmission Optional Type: ZF 4HP-22 4-speed automatic transmission Features Clutch Type: Hydraulically actuated single-plate dry clutch Fluid Specs Manual Transmission Fluid: API GL-4, SAE 75W-90 or 80W-90 (check specific manual for exact spec) Automatic Transmission Fluid: Dexron-III or equivalent (check specific manual for exact spec) 📐 Dimensions Exterior Body Styles: 2-door sedan, 4-door sedan, convertible, touring (wagon - less common for 325i) Wheelbase: Approx. 2565 mm (101 inches) Length: Approx. 4330 mm (170.5 inches) Width: Approx. 1675 mm (66 inches) Height: Approx. 1380 mm (54.3 inches) Weights Curb Weight: Approx. 1300-1400 kg (2866-3086 lbs), varies by body style and options Gvw: Gross Vehicle Weight - Consult specific vehicle plate or manual. Wheel And Tire Bolt Pattern: 5 x 120 mm Tire Size Std: 205/55 VR 15 (common original spec) Wheel Size Std: 15 x 7 inch alloy 🛡️ Safety Features Ratings Crash Tests: Limited formal crash test data available by modern standards. E30 known for robust chassis for its era. Active Features ABS: Anti-lock Braking System (ABS) was an optional feature on many 325i models. Passive Features Seatbelts: Three-point front seatbelts, lap belts in the rear. Headrests: Front and rear headrests (depending on body style/options). Construction Body Structure: Reinforced unibody construction with crumple zones. 💡 Technology Features Infotainment Audio System: Factory-installed cassette radio (often with optional CD changer). Upgradeable to modern head units. Climate Control: Manual or optional automatic climate control system. Driver Assistance Cruise Control: Optional cruise control system. Connectivity Bluetooth: Not available from factory; requires aftermarket installation. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 7,500-10,000 miles (12,000-16,000 km) or annually, whichever comes first...