🏷️ Basic Information Identification Make: BMW Model: M3 Year: 1987 Codes Chassis Code: E30 Generation Generation Identifier: First Generation (E30) 👋 Introduction Market Position Target Audience: BMW M3 E30 owners, independent repair shops, automotive technicians specializing in BMWs Competitive Analysis Value Proposition: Provides in-depth electrical troubleshooting expertise for a classic performance icon, enabling cost-effective repairs and maintenance. Key Features Manual Utility: Empowers users with knowledge to understand complex electrical systems, diagnose faults accurately, and perform repairs efficiently. Historical Significance: Covers a pivotal model in BMW's performance heritage, the E30 M3, renowned for its motorsport success and driving dynamics. 📋 Manual Details Coverage Areas Primary Coverage: Electrical Troubleshooting and Repair Secondary Coverage: Systematic Diagnostics, Power Distribution, Component Location Page Count Estimated Page Count: Detailed, estimated 300-500 pages (typical for comprehensive electrical manuals of this era) Manual Type Manual Classification: Workshop Repair Manual (Electrical Focus) Language Language: English Format File Format: PDF 📖 Manual Coverage Systems Covered Powertrain Electrical: Injection electronics S14 Engine, Charge system, Start system Chassis Electrical: ABS, Brake Warning System, Supplemental Restraint System (Airbag - if applicable to specific 1987 models), Active Check Control Body Electrical: Central locking, Power mirrors, Power windows, Seats (power adjustments), Sunroof (power operation), Ignition key warning/seatbelt warning, Wiper/washer system, Windshield washer jet heater, Instrument cluster Lighting Electrical: Light switch details, Headlights, Fog lights, Turn/hazard lights, Park/tail/front marker lights, Rear marker/license/trunk lights, Back up lights, Stop lights, Interior lights Comfort Convenience: Heating and air conditioning, A/C temperature control, A/C blower controls, A/C air delivery control, A/C compressor controls, A/C auxiliary fan, Radio/antenna, Cruise control, On-board computer Procedures Included Troubleshooting: Systematic troubleshooting methodology, Diagnostic flowcharts, Symptom analysis Wiring Diagrams: Comprehensive wiring diagrams for all covered electrical systems, Power distribution schematics Component Identification: Component location views, Component location chart, Connector views, Splice location views Technical Depth Diagnostic Level: Advanced diagnostics, circuit analysis, fault code interpretation (if applicable), component testing procedures Repair Procedures: Detailed repair instructions for electrical components, wiring harness repair, connector servicing System Understanding: Explanation of electrical system operation, logic diagrams, fuse and relay identification 📊 Manual Specifications File Format File Type: Digital (PDF) Compatibility: All Versions of Windows & Mac Reader Requirement: Adobe PDF Reader Print Quality Printability: Printable pages Binding Type Digital Binding: N/A (Digital File) Paper Type Digital Paper Type: N/A (Digital File) ⚙️ Engine Specifications Primary Engine Engine Code: S14 Engine Type: Naturally Aspirated Inline-4 (DOHC, 16-valve) Displacement: 2.3 Liters (2302 cc) Performance Horsepower: 192 hp @ 6,750 rpm (Catalytic Converter Version), 200 hp @ 6,750 rpm (Non-Catalytic Converter Version) Torque: 170 lb-ft @ 4,750 rpm (Catalytic Converter Version), 177 lb-ft @ 4,750 rpm (Non-Catalytic Converter Version) Fuel System Fuel Delivery: Bosch L-Jetronic Fuel Injection Ignition System: Electronic Ignition (Distributor-based) Cooling System Coolant Type: BMW Blue Coolant or equivalent G48 ethylene glycol based coolant (50/50 mix with distilled water) 🔧 Transmission Standard Transmission Type: Getrag 265 5-speed Manual Gear Ratios Approximate: 1st: 3.72, 2nd: 2.41, 3rd: 1.71, 4th: 1.24, 5th: 1.00 Optional Optional Transmission: N/A (Manual transmission only for M3) Features Clutch Type: Hydraulically operated single dry plate clutch Fluid Specifications Gearbox Oil: API GL-4, SAE 75W-90 or 80W-90 synthetic gear oil 📐 Dimensions Exterior Length: 4,330 mm (170.5 in) Width: 1,680 mm (66.1 in) Height: 1,370 mm (53.9 in) Weights Curb Weight Approximate: 1,200 - 1,270 kg (2,645 - 2,800 lbs) Wheelbase: 2,565 mm (100.9 in) Track Width Front: 1,431 mm (56.3 in) Track Width Rear: 1,441 mm (56.7 in) 🛡️ Safety Features Ratings Crash Test Data: Limited specific crash test data available for 1987 models; E30 platform generally performed well for its era. Active Features Braking System: Anti-lock Braking System (ABS) available as an option. Chassis Dynamics: Performance-tuned suspension, limited-slip differential (LSD) standard on M3. Passive Features Airbags: Supplemental Restraint System (SRS) - driver's airbag typically standard or optional on later 1987 models/regions. Seatbelts: 3-point front seatbelts, 2-point rear seatbelts (early models), 3-point rear seatbelts (later models). 💡 Technology Features Infotainment Audio System: Original BMW Bavaria C or similar premium cassette player with optional amplifier and speaker upgrades. Driver Assistance Cruise Control: Factory-installed cruise control system. Connectivity Onboard Computer: BMW On-Board Computer (OBC) displaying basic diagnostics and trip information. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000-7,500 miles (8,000-12,000 km) or annually, whichever comes first, depending on driving conditions. Spark Plug Replacement: Refer to manual; typically around 20,000-30,000 miles. Timing Belt Replacement: The S14 engine uses a timing chain, not a belt, for valve train timing, requiring periodic tensioner and guide checks. Fluid Specifications Engine Oil Specification: SAE 20W-50 or 15W-50 synthetic or semi-synthetic engine oil meeting BMW Longlife-98 or similar API SG/SH specification. Consult manual for exact OEM spec. Brake Fluid Specification: DOT 4 or DOT 5.1 brake fluid. Power Steering Fluid: Pentosin CHF 11S or equivalent hydraulic fluid. Known Issues Electrical Common Problems: Corroded grounds, failing...