🏷️ Basic Information Identification Make: BMW Model: 3-series / M3 Chassis Code: E30 Model Years Covered: 1986 Codes Engine Codes Covered: M10, M20, M42 (potential for 1986 models) Transmission Codes Covered: Getrag 260 (manual), ZF 4HP22 (automatic) 👋 Introduction Market Position Target Audience: BMW E30 3-series and M3 owners, independent repair shops, BMW enthusiasts Competitive Analysis Uniqueness: Directly mirrors dealership service information, offering specificity not found in generic aftermarket manuals Key Features Authenticity: Official BMW service data, ensuring accuracy and completeness for the specified model years and variants Scope Of Repair: Covers virtually every aspect of vehicle maintenance and repair, from routine service to major component overhauls 📋 Manual Details Coverage Areas Coverage Scope: All models and all repairs A-Z Page Count Estimated Page Count: Extensive (typically 800+ pages for comprehensive E30 manuals) Manual Type Manual Type: Service and Repair Manual Language Language: English Format Format: Likely printed physical copy (as implied by dealership usage) 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical (short block, cylinder head, valvetrain), fuel injection, ignition system, cooling system, lubrication system, exhaust system, emissions control Drivetrain Systems: Clutch, manual transmission, automatic transmission, driveshaft, differential, axles Suspension Steering: Front suspension (MacPherson struts), rear suspension (semi-trailing arms), steering system (rack and pinion), power steering Braking Systems: Front disc brakes, rear drum or disc brakes (depending on model/year), parking brake, ABS (if equipped) Electrical Systems: Battery, charging system (alternator), starting system, lighting system, instrumentation, wiring diagrams, ECU (Engine Control Unit), sensors Body Chassis: Body panels, doors, windows, interior trim, chassis components, rust prevention Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspections and replacement, brake pad inspection and replacement Diagnostic Procedures: Troubleshooting guides, symptom-based diagnostics, fault code interpretation (if applicable for the era), testing procedures for electrical components Repair Procedures: Engine overhaul, transmission rebuild, brake caliper service, suspension component replacement, electrical component repair, bodywork repair Technical Specifications: Torque specifications, clearances, timing settings, fluid capacities, diagnostic values Technical Depth Depth Of Coverage: Comprehensive (from basic maintenance to complete engine/transmission rebuilds), dealership-level detail 📊 Manual Specifications File Format Digital File Format: Not explicitly stated, but implied to be a direct reproduction of dealership service information, often available in PDF for modern distribution Print Quality Print Quality Expectation: High quality, clear diagrams and text, professional printing Binding Type Binding Type Expectation: Professional binding (e.g., perfect binding, spiral binding for ease of use in a workshop) Paper Type Paper Type Expectation: Durable paper stock suitable for workshop environments ⚙️ Engine Specifications Primary Engine Variants 1986 325I / 325E: M20 inline-six, 2.5L (325i) or 2.7L (325e - 'eta' model with higher torque, lower redline) 325I Convertible/Convertible: M20 inline-six, 2.5L M3 (Us Spec): Evolved M20 inline-four, 2.3L S14 (performance variant) Performance 325I (2.5L) Horsepower (Approx.): 168-171 hp 325E (2.7L) Horsepower (Approx.): 121-127 hp M3 (S14) Horsepower (Approx.): 192-195 hp Fuel System Fuel Delivery: Bosch L-Jetronic (early) or Motronic (later) fuel injection system Fuel Type: Unleaded Premium Gasoline 🔧 Transmission Standard Transmission Standard Transmission Type: 5-speed Getrag 260 manual transmission Optional Transmission Optional Transmission Type: 4-speed ZF 4HP22 automatic transmission Features Limited Slip Differential: Optional LSD available for 325i and standard on M3 📐 Dimensions Exterior Sedan Length: Approx. 170.5 inches (4330 mm) Width: Approx. 65.4 inches (1660 mm) Height: Approx. 54.7 inches (1390 mm) Exterior Coupe Length: Approx. 170.5 inches (4330 mm) Width: Approx. 65.4 inches (1660 mm) Height: Approx. 53.1 inches (1350 mm) Weights Curb Weight Sedan Manual: Approx. 2750-2850 lbs (1250-1290 kg) Curb Weight M3: Approx. 2850-2950 lbs (1290-1340 kg) 🛡️ Safety Features Ratings NHTSA Rating 1986: No specific rating available from NHTSA for 1986 models, but generally considered safe for its era. Active Features Anti Lock Brakes: Optional ABS on some models, particularly 325i and M3 Passive Features Seatbelts: Three-point front seatbelts, lap belts in rear Body Structure: Reinforced safety cage, crumple zones 💡 Technology Features Infotainment Radio System: Factory AM/FM cassette player, optional premium sound systems On Board Computer: Optional On-Board Computer (OBC) with basic diagnostics and trip computer functions Driver Assistance Cruise Control: Available on many models Connectivity Ancillary Features: Power windows, power locks, sunroof (manual or electric), air conditioning 🔧 Maintenance Service Intervals General Oil Change Interval: Every 5,000 - 7,500 miles or annually (depending on driving conditions and oil used) Spark Plug Replacement: Every 30,000 miles (conventional) or 60,000 miles (long-life) Timing Belt Replacement: N/A for M20 engines (chain-driven); S14 uses a chain. Fluid Specifications Engine Oil Type: API SG or higher, viscosity 15W-40 or 20W-50 (check manual for specific temperature ranges) Coolant Type: BMW Blue Ethylene Glycol based coolant (50/50 mix with distilled water) Transmission Fluid Manual: API GL-4, SAE 75W-90 or 80W-90 gear oil Transmission Fluid Automatic: Dexron III (or equivalent for ZF 4HP22) Brake Fluid Type: DOT 3 or DOT 4 Known Issues Common Wear...