🏷️ Basic Information Identification Make: BMW Model: 325i Generation Chassis Code: E30 Codes Engine Code: M20B25 👋 Introduction Market Position Positioning: The BMW 325i (E30) represented the pinnacle of compact executive sport sedans and coupes in its era, celebrated for its driving dynamics, build quality, and performance. Competitive Analysis Competitors: Competed directly with models like the Mercedes-Benz 190E, Audi 80/90, and Alfa Romeo Milano/75, often surpassing them in handling and driver engagement. Key Features Driving Dynamics: Renowned for its balanced chassis, rear-wheel-drive layout, and responsive steering, providing a quintessential BMW driving experience. Engine Performance: The M20B25 engine offered a smooth power delivery and a distinctive inline-six character, making it a popular choice for performance enthusiasts. 📋 Manual Details Coverage Areas Years Covered: 1987, 1988, 1989, 1990, 1991 Page Count Estimated Pages: 1500+ Manual Type Type: Comprehensive Factory Repair Manual / Service Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Engine: M20B25 2.5L Inline-6: Engine mechanical, lubrication, cooling, fuel injection (Bosch Motronic), ignition, exhaust, emissions control Transmission: Getrag 260 (5-speed manual), ZF 4HP22 (4-speed automatic): Clutch, gearbox, drive shafts, differential Suspension: Front MacPherson struts, Rear semi-trailing arms: Springs, shock absorbers, bushings, alignment specifications Brakes: Front vented discs, Rear solid discs (standard): ABS (optional), hydraulic system, caliper and rotor specifications, bleeding procedures Electrical: Complete wiring diagrams, fuse box layouts, component testing, diagnostic procedures for lighting, instruments, power windows, central locking, sound system Bodywork: Body and frame repair, interior trim removal, glass replacement, doors, hood, trunk lid adjustment, rust repair techniques Procedures Included Maintenance: Oil changes, filter replacements, spark plug service, belt tensioning, coolant flushes, brake pad replacement, diagnostic checks Troubleshooting: Step-by-step diagnostic flowcharts for common drivability, electrical, and mechanical faults Repair: Detailed overhaul procedures for engine, transmission, differential, suspension components, brake systems, and electrical modules Diagnostics: On-board diagnostics (OBD) information where applicable, sensor testing, actuator testing, ECU checks Technical Depth Depth: Expert-level, covering complete rebuilds, complex diagnostics, and specialized procedures. Suitable for professional technicians and advanced DIY enthusiasts. 📊 Manual Specifications File Format PDF Quality: High-resolution, searchable text with clear diagrams and images Print Quality Printability: Printable pages allowing for offline use and referencing during repairs Binding Type Digital Binding: N/A (Digital Format) Paper Type Digital Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Inline-6 Cylinder, Naturally Aspirated Displacement: 2494 cc (2.5 Liters) Bore X Stroke: 84.0 mm x 75.0 mm Compression Ratio: 8.8:1 Valve Train: SOHC, 12 Valves (2 per cylinder) Performance Horsepower: 168 hp @ 5800 rpm (approx.) Torque: 164 lb-ft @ 4300 rpm (approx.) Fuel System Fuel Delivery: Bosch LE-Jetronic Fuel Injection (Sequential/Simultaneous depending on specific variant/year) Fuel Type: Unleaded Gasoline (Premium Unleaded Recommended) Fuel Pump Part Number Example: Bosch 0 580 464 006 (check for specific model fitment) Ignition Ignition System: Electronic Ignition (Distributor-based with Coil) Cooling Cooling System Type: Pressurized Liquid Cooling Coolant Capacity Liters: 7.0 L (approx.) Lubrication Oil Capacity Liters: 4.25 L (approx. with filter) Recommended Oil Viscosity: 15W-50 or 10W-40 (check manual for specific climate/usage) Oil Filter Part Number Example: Mann-Filter W920/17 or Bosch 0 986 452 043 (check for specific model fitment) 🔧 Transmission Standard Type: Getrag 260 5-Speed Manual Transmission Optional Type: ZF 4HP22 4-Speed Automatic Transmission Features Manual Gear Ratios Example: 1st: 4.00, 2nd: 2.17, 3rd: 1.40, 4th: 1.00, 5th: 0.81, Reverse: 3.81 (check specific transmission code) Automatic Features: Lock-up torque converter, Sport mode Fluid Specs Manual Transmission Fluid Type: GL-4 Hypoid Gear Oil (e.g., SAE 75W-90) Manual Transmission Fluid Capacity Liters: 1.5 L (approx.) Automatic Transmission Fluid Type: ATF Dexron III or equivalent Automatic Transmission Fluid Capacity Liters: 1.75 L (approx. drain/refill) 📐 Dimensions Exterior Wheelbase Mm: 2565 mm (approx.) Length Mm: 4340 mm (approx.) Width Mm: 1675 mm (approx.) Height Mm: 1380 mm (approx.) Wheel Bolt Pattern: 5x120 Wheel Offset Et: ET25 to ET30 (typical for 15-inch wheels) Weights Curb Weight Kg: 1200 - 1350 kg (depending on body style and equipment) Gross Vehicle Weight Rating Kg: 1700 kg (approx.) 🛡️ Safety Features Ratings Crash Test Data: While official NHTSA/IIHS ratings for this specific era are limited, E30 models are generally considered robust for their time. The manual covers crashworthiness considerations and related repairs. Active Features ABS: Optional on most models, standard on some later variants. Manual covers ABS component testing and diagnostics. Passive Features Airbags: Not standard on most 1987-1991 E30 models; available as an option on later models. Manual covers pre-tensioned seatbelt systems. Seatbelts: 3-point seatbelts with pretensioners (front), 2-point or 3-point seatbelts (rear depending on body style). 💡 Technology Features Infotainment Audio System: Factory radio/cassette player (e.g., BMW Bavaria C II), optional premium sound systems. Manual covers wiring and component replacement. Driver Assistance Cruise Control: Available as an option on many models. Manual covers system operation and troubleshooting. Connectivity Interior Features: Power windows, power mirrors, central locking,...