🏷️ Basic Information Identification Make: BMW Model: 3-series / M3 Chassis Code: E30 Model Year: 1989 Codes Engine Codes Covered: M20B25 (2.5L I6), M42B18 (1.8L I4 - likely for 318i/is variants if applicable in 1989, Engine Codes Covered M3: S14B23 (2.3L I4 - for M3) 👋 Introduction Market Position Positioning: The E30 chassis represented a significant evolution for BMW's compact executive car line, balancing sporty driving dynamics with premium build quality and advanced engineering for its era. Competitive Analysis Competitors: Competed with vehicles like the Mercedes-Benz 190E, Audi 80/90, and various sporty coupes/sedans from American and Japanese manufacturers. Key Features Driving Dynamics: Renowned for its excellent handling, rear-wheel-drive platform, and driver-focused cockpit. The M3 variant was homologated for motorsport and offered a more potent performance package. Manual Value Proposition: This manual is invaluable for E30 owners and technicians seeking precise, OEM-level repair and maintenance information, crucial for preserving the classic character and performance of these vehicles. 📋 Manual Details Coverage Areas Coverage: All models & all repairs A-Z Page Count Page Count: Typically over 800 pages, though exact count may vary slightly by specific publisher edition. Manual Type Manual Type: Service and Repair Manual Language Language: English Format Format: Likely Printed Book (standard for dealer manuals of this era); PDF versions may exist through third-party aggregators. 📖 Manual Coverage Systems Covered Engine: Engine mechanical, cooling system, lubrication system, fuel system (EFI), ignition system, emissions control. Transmission: Manual transmission (Getrag 260 for most RWD models), automatic transmission (ZF 4HP22 for most RWD models), clutch, driveline, differentials. Brakes: Front and rear brake systems (disc brakes), parking brake, ABS (if equipped). Suspension Steering: Front and rear suspension components (struts, control arms, bushings), power steering system, steering rack. Electrical: 12V electrical system, battery, alternator, starter, lighting system, fuses, relays, wiring diagrams, engine control unit (ECU), diagnostics. Body Chassis: Body construction, exterior trim, interior trim, HVAC system, seats, doors, windows, body panels, chassis components. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, tune-ups, fluid checks and changes. Repair: Engine overhaul, transmission rebuild, brake caliper replacement, suspension component repair, electrical component troubleshooting. Diagnostics: Troubleshooting guides for common issues, diagnostic trouble codes (DTCs) and procedures (OBD-I era). Special Tools: Identification and usage of specialized BMW tools for specific repair procedures. Technical Depth Depth: Comprehensive, covering everything from routine maintenance to complete engine and transmission overhauls. Detailed diagrams and torque specifications are included. 📊 Manual Specifications File Format File Format: N/A (Assuming printed manual, not digital file) Print Quality Print Quality: High-quality, dealership-grade printing with clear diagrams and legible text. Binding Type Binding Type: Likely perfect-bound or spiral-bound for durability and ease of use in a workshop environment. Paper Type Paper Type: Durable, often glossy or semi-gloss paper to withstand workshop conditions and ensure clarity of diagrams. ⚙️ Engine Specifications Primary Engine Engine 325I: M20B25, 2.5L (2494cc) SOHC inline-6 Engine M3: S14B23, 2.3L (2302cc) DOHC inline-4 (based on M10 block, but significantly upgraded) Performance Horsepower 325I: Approx. 168-170 hp @ 5800-6000 rpm Torque 325I: Approx. 220-225 Nm (162-166 lb-ft) @ 4000-4300 rpm Horsepower M3: Approx. 192-215 hp @ 6750 rpm (depending on specific M3 variant/market) Torque M3: Approx. 240-255 Nm (177-188 lb-ft) @ 4750-4800 rpm Fuel System Fuel System Type: Bosch Motronic electronic fuel injection (EFI) Fuel Type Required: Premium Unleaded gasoline (91 octane or higher) Engine Management ECU Type: Bosch Motronic (e.g., Motronic ML4.1, ML 5.1) 🔧 Transmission Standard Transmission 325I: 5-speed manual (Getrag 260) Transmission M3: 5-speed manual (Getrag 265 - closer ratio than 325i) Optional Transmission 325I: 4-speed automatic (ZF 4HP22) Features Clutch Type: Hydraulically actuated single dry plate clutch. Fluid Specifications Manual Transmission Fluid: BMW ATF (Automatic Transmission Fluid) or equivalent SAE 75W-90 synthetic gear oil (check manual for precise spec). Automatic Transmission Fluid: Dexron III or equivalent ATF. Differential Differential Fluid: SAE 75W-90 synthetic hypoid gear oil. 📐 Dimensions Exterior Wheelbase: Approx. 2565 mm (101 in) Length: Approx. 4345 mm (171 in) Width: Approx. 1675 mm (66 in) Height: Approx. 1370 mm (54 in) Weights Curb Weight 325I: Approx. 1240-1300 kg (2734-2866 lbs) Curb Weight M3: Approx. 1200-1250 kg (2646-2756 lbs) Gross Vehicle Weight Rating: Typically around 1700-1800 kg (check specific model variation). Wheels Tires Wheel Bolt Pattern: 5x120 Standard Wheel Size: 15 inch (e.g., 15x7J) for most 325i, 15 or 16 inch for M3 Standard Tire Size: 205/55VR15 for 325i, 225/50VR16 for M3 (common sizes, check manual for exact specs). 🛡️ Safety Features Ratings Crash Testing: While official NHTSA/IIHS ratings for this era are not as comprehensive as today, the E30 was known for its robust construction and safety cell. Specific ratings may not be readily available for this model year. Active Features ABS: Anti-lock Braking System (ABS) was optional on most 325i models and standard on M3. Covered in detail in the manual. Traction Control: Traction control was generally not...