🏷️ Basic Information Identification Make: BMW Model: 3 Series Chassis Code: E30 Product Name: BMW 320i 325i E30 1983-1991 Repair Service Manual Generation Generation Codes: E30 Production Years: 1983-1991 Codes Engine Codes Covered: M20B20 (2.0L), M20B25 (2.5L) 👋 Introduction Market Position Value Proposition: Empowers owners to be better informed and discuss repairs knowledgeably with technicians; provides professional-level repair information. Competitive Analysis Information Source: Contains information equivalent to authorized dealer service department resources. Key Features Access Method: Instant download upon payment, no shipping costs or waiting time. Device Compatibility: Viewable on PC, Mac, phones, and ebook readers (e.g., Kindle). Practical Utility: Enables users to diagnose issues, evaluate repair approaches, and communicate effectively with mechanics. 📋 Manual Details Coverage Areas Primary Models Covered: 320i, 325i Secondary Models Covered: All E30 variants with specified engines Page Count Estimated Page Count: N/A (Digital Format) Manual Type Manual Classification: Repair Service Manual Language Language: English Format Digital Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Engine service and overhauling, induction, fuel system, emission control, mechanical components Engine Management: Control system, engine management systems analysis Transmission And Drivetrain: Transmission service, differentials, transmission and differentials Chassis And Suspension: Chassis, steering and suspension Brakes: Brakes, ABS (Anti-lock Braking System) Electrical And Wiring: Wiring diagrams, specific terminal pin connections, expected readings Body And Interior: Bodywork, interior components Emission Control: Emission control systems, diagnosis and repair. Procedures Included Maintenance: General service work, preventative maintenance tips Diagnostics And Troubleshooting: Troubleshooting and diagnostics, diagnosing engine fault symptoms, common fixes, practical quick solutions (e.g., no-starts, hesitations, stalling) Repair And Overhaul: Engine overhauling, component repair procedures Testing And Verification: Testing suspected parts using specialized techniques, verifying wiring diagrams, testing work done after repair Torque Settings: Full specifications and torque settings for all major components. Technical Depth Depth Of Information: Comprehensive, same specifications and procedures as authorized dealer service departments Target Audience: Owners with basic mechanical skills and independent auto service professionals 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable within PDF Accessibility Features: Viewable on multiple devices, printable pages for workshop use. Print Quality Printable Pages: Yes, individual pages can be printed Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Model 320I: M20B20 Engine Displacement 320I: 2.0 Liters (1990 cc) Engine Type 320I: Inline-6, SOHC Engine Model 325I: M20B25 Engine Displacement 325I: 2.5 Liters (2494 cc) Engine Type 325I: Inline-6, SOHC Performance Horsepower 320I Approx: 125-129 hp (depending on market and year) Torque 320I Approx: 174-180 Nm (depending on market and year) Horsepower 325I Approx: 168-171 hp (depending on market and year) Torque 325I Approx: 224-226 Nm (depending on market and year) Fuel System Fuel Delivery System: Bosch Motronic electronic fuel injection (EFI) Fuel Type: Unleaded gasoline 🔧 Transmission Standard Transmission Type Standard: Getrag 260 5-speed manual transmission Optional Transmission Type Optional: ZF 4HP22 4-speed automatic transmission Features Clutch Type: Hydraulically operated single dry plate clutch Differential: Limited Slip Differential (LSD) often optional on 325i 📐 Dimensions Exterior Body Styles: 2-door sedan, 4-door sedan, convertible, (touring/wagon not officially offered by BMW in E30, but aftermarket exists) Weights Curb Weight Approx: 1200-1350 kg (depending on body style and options) 🛡️ Safety Features Ratings Safety Standards: Built to 1980s automotive safety standards; ABS available on some models. Active Features ABS: Optional Anti-lock Braking System (ABS) on later models, particularly 325i. Passive Features Seatbelts: Three-point inertia-reel seatbelts with front seatbelt pretensioners on many models. Driver Controls: Driver-focused cockpit ergonomics. 💡 Technology Features Infotainment Radio Options: Factory fitted or dealer installed radios, often with cassette players. Driver Assistance Cruise Control: Optional cruise control on some models. Connectivity Diagnostics Port: Early diagnostic systems were mechanical and electronic, with limited OBD-I capability on later models, but not comprehensive like modern OBD-II. 🔧 Maintenance Service Intervals Oil Change Interval Recommendation: Every 7,500-10,000 miles (12,000-16,000 km) or annually, whichever comes first (check manual for exact specification). Spark Plug Replacement Interval Recommendation: Typically every 20,000-30,000 miles (32,000-48,000 km) depending on plug type (check manual). Fluid Specifications Engine Oil Type: API SG or higher, SAE 10W-40 or 15W-50 (refer to manual for specific viscosity based on climate). Coolant Type: BMW Blue antifreeze or equivalent ethylene glycol-based coolant, mixed 50/50 with distilled water. Brake Fluid Type: DOT 3 or DOT 4 brake fluid. Transmission Fluid Manual: API GL-4 SAE 75W-90 or 80W-90 gear oil (check manual for specific type and capacity). Transmission Fluid Automatic: Dexron II or III ATF (Automatic Transmission Fluid) (check manual for specific type and capacity). Known Issues Common E30 Issues: Rust (especially in common areas), fuel distributor seal leaks (K-Jetronic), seized wiper motor, sagging headliner, OBC (On-Board Computer) failures, differential mount cracking, injector seal degradation. Engine Specific Issues: M20 engines can suffer from oil leaks (valve cover gasket, oil pan gasket), coolant leaks (heater hoses, water...