🏷️ Basic Information Identification Make: BMW Model: 325i Chassis Code: E30 Codes Engine Codes: M20B25 Model Years Covered: 1987, 1988, 1989, 1990, 1991 👋 Introduction Market Position Market Segment: Premium Compact Executive Sedan/Coupe Target Audience: Enthusiasts, DIY mechanics, professional workshops working on E30 models Competitive Analysis Competitors: Mercedes-Benz 190E, Audi 80/90, Alfa Romeo 75 Key Features Vehicle Focus: Exceptional handling, driver engagement, robust engineering Manual Value: Empowers owners/technicians with in-depth knowledge for proper maintenance and repair, saving time and money 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service & Repair Secondary Coverage: Maintenance, Troubleshooting, Diagnostics, Overhaul Page Count Estimated Page Count: 500+ Manual Type Type: Professional Workshop Manual Language Language: English Format Format: Downloadable Digital Format (PDF likely) 📖 Manual Coverage Systems Covered Powertrain: Engine (M20B25), Fuel System, Cooling System, Lubrication System, Exhaust System Drivetrain: Transmission (Manual/Automatic), Clutch, Drive Shafts, Differential, Axles Chassis: Suspension (Front/Rear), Steering System, Braking System, Wheels and Tires Electrical: Engine Control Unit (ECU), Ignition System, Lighting System, Instrumentation, Power Accessories, Battery and Charging System Body: Body Panels, Doors, Hood, Trunk, Glass, Interior Trim Procedures Included Maintenance: Oil Changes, Filter Replacements, Spark Plug Service, Fluid Checks and Replacements, Belt Adjustments Repair: Engine Overhaul, Transmission Rebuild, Suspension Component Replacement, Brake System Repair, Electrical Component Diagnosis and Replacement Troubleshooting: Diagnostic Charts, Symptom-Based Troubleshooting Guides, Fault Code Interpretation Diagnostics: Component Testing, Electrical System Tracing, Mechanical System Checks Technical Depth Depth: Comprehensive (from basic maintenance to complete engine/transmission rebuilds) Detail Level: Step-by-step instructions with detailed diagrams and illustrations Special Tools: Identification and usage of specialized BMW tools required for specific procedures 📊 Manual Specifications File Format Format: PDF (Portable Document Format) Searchability: Text-searchable (allows quick access to specific information) Print Quality Quality: High Resolution (suitable for printing) Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) Completeness Completeness: Full Workshop Manual (equivalent to dealer issue) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-cylinder, Naturally Aspirated Displacement: 2.5 Liters (2494 cc) Bore X Stroke: 84.0 mm x 75.0 mm Compression Ratio: 8.8:1 (typical) Valvetrain: SOHC (Single Overhead Camshaft), 2 valves per cylinder Performance Horsepower: 168-171 hp @ 5,800 rpm (approx.) Torque: 164-167 lb-ft @ 4,750 rpm (approx.) Fuel System Injection System: Bosch Motronic Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline (Premium Recommended) 🔧 Transmission Standard Transmission Type: Getrag 260 5-Speed Manual Transmission Optional Transmission Type: ZF 4HP22 4-Speed Automatic Transmission Features Manual Gear Ratios: 3.72 / 2.04 / 1.32 / 1.00 / 0.81 (typical, subject to change) Automatic Features: Lock-up torque converter for improved efficiency Fluid Specs Manual Transmission Fluid: BMW ATF LT-2 or equivalent (e.g., Dexron II) Automatic Transmission Fluid: BMW ATF LT-2 or equivalent (e.g., Dexron II) 📐 Dimensions Exterior Wheelbase: 100.4 inches (2550 mm) Length: 170.5 inches (4331 mm) Width: 65.3 inches (1659 mm) Height: 54.7 inches (1390 mm) Weights Curb Weight: 2,900 - 3,100 lbs (approx., depending on body style and options) Gross Vehicle Weight Rating: N/A (specified in vehicle VIN plate) 🛡️ Safety Features Ratings Crash Test Results: NHTSA ratings from the era were generally good, focusing on structural integrity and occupant protection. Specific detailed ratings may vary by year and testing protocols. Active Features Braking System: Four-wheel disc brakes (ventilated front, solid rear) ABS: Anti-lock Braking System (ABS) optional or standard on later models Passive Features Airbags: Driver airbag optional on early models, standard on later models Seat Belts: Three-point inertia-reel seat belts Chassis Design: Reinforced safety cage and crumple zones 💡 Technology Features Infotainment Audio System: Factory fitted radio/cassette players (e.g., Bavaria C, RDS variants), optional CD players on later models Speakers: Typically 4-6 speakers Driver Assistance ABS: Available as an option, providing enhanced braking control Connectivity Climate Control: Manual climate control standard, optional automatic climate control on higher trims Power Features: Power windows, power mirrors, power sunroof (optional) 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 - 7,500 miles or 6-12 months (synthetic oil recommended) Coolant Flush Interval: Every 2 years or 30,000 miles Spark Plug Replacement: Every 30,000 - 60,000 miles (depending on plug type) Timing Belt Replacement: Every 60,000 miles or 5 years (crucial for M20 engine) Fluid Specifications Engine Oil Capacity: 5.0 - 5.5 Liters (with filter, approx.) Engine Oil Type: API SG or higher, SAE 10W-40 or 15W-50 recommended (check owner's manual for specific climate recommendations) Coolant Type: BMW Blue Antifreeze/Coolant or equivalent (50/50 mix with distilled water) Brake Fluid Type: DOT 3 or DOT 4 Known Issues Common Problems: Cooling system leaks (cracked plastic expansion tank, hoses), heater core issues, fuel distributor leaks (L-Jetronic), oil leaks (valve cover gasket, oil pan gasket), wear on suspension bushings, alternator bearing failure, ABS sensor failures. Preventative Maintenance: Regular inspection of hoses and rubber components, timely replacement of the timing belt, thorough cooling system service. 📚 Vehicle History Brand Heritage Bmw Philosophy: Sheer Driving Pleasure, performance,...