🏷️ Basic Information Identification Make: BMW Model: 3-Series Model Variant: 325i Chassis Code: E30 Model Years Covered: 1987-1991 Codes Engine Code Common: M20B25 👋 Introduction Market Position E30 Generation Significance: The E30 chassis is a highly regarded generation of the BMW 3-Series, known for its sporty handling, reliable engineering, and classic design. The 325i represented the top-tier performance model for much of its run. Competitive Analysis Era Competitors: Competed against vehicles like the Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75, and sporty coupes from brands like Ford (Sierra XR4i) and Opel (Kadett GSi). Key Features Driving Dynamics: Renowned for its balanced chassis, RWD layout, and engaging driving experience. Build Quality: Typical BMW build quality for the era, emphasizing durability and driver focus. Manual Value Target User Benefit: Provides the detailed technical information necessary for accurate diagnosis, repair, and preventative maintenance, empowering owners and technicians to maintain the E30 325i to factory standards. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual Language: English Format: Downloadable Digital File (PDF) Intended Audience: Professional Technicians and Experienced DIY Enthusiasts Comprehensiveness: Comprehensive coverage for all major systems and components 📖 Manual Coverage Systems Covered Engine Mechanical: Engine assembly, disassembly, overhaul, cylinder head, block, crankshaft, pistons, connecting rods, lubrication system, cooling system. Engine Management: Bosch Motronic fuel injection and ignition systems (ME/ME-S/ME-E control), sensor testing, actuator diagnostics, emissions control. Transmission: Getrag 260 5-speed manual transmission overhaul, clutch system, driveline, driveshaft, rear axle assembly. Brakes: Front and rear disc brake systems, ABS (Anti-lock Braking System) diagnostics and repair, hydraulic circuits, master cylinder, calipers. Suspension: Front MacPherson struts, rear semi-trailing arms, shock absorbers, springs, bushings, alignment specifications. Steering: Power steering system, steering rack, tie rods, steering column, steering knuckle. Electrical System: Battery, alternator, starter motor, lighting systems, instrumentation, wiring diagrams, fuse box locations, relay functions. Body And Chassis: Body panel removal and installation, door mechanisms, window regulators, sunroof operation, interior trim, chassis components. Heating Ventilation Air Conditioning: HVAC system operation, refrigerant handling (R12 for this era), blower motor, evaporator, condenser, heater core. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, spark plug replacement, tune-ups, brake fluid flush, coolant flush. Troubleshooting: Systematic diagnostic procedures for common and uncommon issues, diagnostic trouble codes (DTCs) where applicable, component testing. Repair: Step-by-step instructions for component removal, repair, and reinstallation across all covered systems. Diagnostics: Detailed diagnostic flowcharts and procedures for identifying faults, including electrical and mechanical diagnosis. Specifications: Torque specifications, clearances, fluid capacities, alignment angles, and other critical data. Technical Depth Engine Rebuild: Full engine rebuild procedures, including cylinder honing, piston ring installation, bearing clearances, valve seating, and timing belt replacement. Transmission Overhaul: Detailed steps for disassembling, inspecting, and reassembling the Getrag 260 manual transmission. Electrical Diagnostics: In-depth electrical troubleshooting using wiring diagrams, including component resistance and voltage checks. ABS System: Specific diagnostic procedures and repair steps for the ABS system, including sensor and hydraulic unit servicing. Bodywork Repair: Procedures for common body repairs, panel alignment, and rust prevention/repair. 📊 Manual Specifications File Format File Type: PDF (Portable Document Format) Searchability: Searchable text for quick information retrieval. Printability: Printable pages for workshop use. Resolution: High resolution for clear diagrams and illustrations. Print Quality Illustrations: Detailed diagrams, schematics, and photographic illustrations. Text Clarity: Clear, concise technical language. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) Page Count Estimated Pages: Est. 1000+ pages (typical for comprehensive workshop manuals of this era) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Inline-6 Cylinder Engine Code: M20B25 Displacement: 2494 cc (2.5 Liters) Performance Horsepower Peak: 171 hp @ 5800 rpm (for most 1987-1991 models) Torque Peak: 164 lb-ft (225 Nm) @ 4300 rpm (for most 1987-1991 models) Fuel System Fuel Delivery: Bosch Motronic Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline (Premium Recommended) Engine Internals Bore X Stroke: 84.0 mm x 75.0 mm Compression Ratio: 8.8:1 Ignition System Ignition Type: Electronic Ignition with Knock Sensor 🔧 Transmission Standard Transmission Type: Getrag 260 5-Speed Manual Transmission Optional Automatic Transmission Option: ZF 4HP22 4-Speed Automatic Transmission Features Clutch Type: Hydraulically Actuated Single Dry Plate Clutch Driveshaft: One-piece driveshaft with universal joints Rear Axle: Limited Slip Differential (LSD) often an option or standard on some 325i models. 📐 Dimensions Exterior Length: Approx. 170.5 in (4330 mm) Width: Approx. 66.9 in (1700 mm) Height: Approx. 55.1 in (1400 mm) Wheelbase: Approx. 101.2 in (2570 mm) Weights Curb Weight: Approx. 2800-3000 lbs (1270-1360 kg), varies by options 🛡️ Safety Features Ratings Crash Test Data: Refer to NHTSA or IIHS archives for specific crash test results from this era; generally considered robust for its time. E30s were known for their structural integrity. Active Features ABS: Anti-lock Braking System (standard on later models, optional earlier) Limited Slip Differential: Optional on 325i for improved traction. Passive Features Seat Belts: Three-point inertia-reel seat belts front and rear....