🏷️ Basic Information Identification Make: BMW Model: 5 Series Chassis Code: E28 Model Variant: 528e, 535i Year: 1986 Codes Engine Code 528E: M20B27 (2.7L Inline-6) Engine Code 535I: M30B34 (3.4L Inline-6) 👋 Introduction Market Position Target Audience: Professional technicians, independent mechanics, and advanced DIY enthusiasts seeking detailed electronic troubleshooting for the E28 5 Series. Competitive Analysis Differentiation: Focuses specifically on electronic troubleshooting, offering a more specialized and in-depth resource than generic repair manuals for this particular aspect of the E28 platform. Key Features Data Accuracy: Technical data maintained like original manufacturer books, ensuring accuracy and reliability for diagnostics. Accessibility: Instant download provides immediate access to critical repair information, saving time compared to sourcing physical manuals. 📋 Manual Details Coverage Areas Primary Coverage: Electronic Troubleshooting Secondary Coverage: General Maintenance, Engine Service/Repair, Transmission Service/Repair, Brake System, Electrical System, Suspension, Steering, Cooling System, Fuel Injection, Fuel System, Emission System, Heater/Air Conditioning, Engine Control System, Chassis/Body, Restraint System, Interior, Differential/Drive, Axle Page Count Estimated Pages: Hundreds to Thousands (Printable Quality) Manual Type Type: Factory Service Repair Manual (Electronic Troubleshooting Focus) Language Language: English Format File Format: PDF Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader, WinZip (for larger files) System Compatibility: All Versions of Windows & Mac 📖 Manual Coverage Systems Covered Engine Control: Detailed coverage of engine management systems, including Motronic (for M30) and Bosch L-Jetronic (for M20) where applicable, ECU diagnostics, sensor inputs, and actuator outputs. Fuel Injection: In-depth troubleshooting of fuel delivery, injector operation, fuel pressure regulators, and related electronic components for both 528e and 535i models. Electrical System Wiring Diagrams: Comprehensive, factory-level wiring schematics for all major electrical systems, including lighting, ignition, starting, charging, accessories, and control modules. Diagnostics: Specific diagnostic procedures for common electrical faults, including testing of relays, switches, sensors, wiring harnesses, and control units. Transmission Automatic Transmission Troubleshooting: Electronic control unit (TCU) diagnosis, shift solenoids, speed sensors, and hydraulic control circuits for automatic transmissions. Manual Transmission Diagnostics: While primarily electronic troubleshooting, it likely covers electrical aspects related to reverse lights, clutch interlocks, and speed sensors. Procedures Included Troubleshooting Methodology: Step-by-step diagnostic routines, fault code interpretation (if applicable for the era), and systematic problem-solving approaches for electronic issues. Component Testing: Detailed procedures for testing the functionality of electronic components such as ignition coils, fuel injectors, sensors (e.g., MAF, TPS, O2), control modules, and actuators. Wiring Repair: Guidance on identifying and repairing damaged wiring, connector issues, and intermittent electrical faults. Technical Depth Depth: Advanced diagnostic and repair procedures focusing on the electronic control systems that manage engine, transmission, and other vehicle functions. Includes detailed schematics and pinpoint tests. 📊 Manual Specifications File Format PDF Quality: High quality, printable pages as described by the seller. Searchability: Likely searchable PDF text, facilitating quick information retrieval. Print Quality Printability: Designed for printing with 'GREAT QUALITY'. Binding Type Binding: Digital Download (no physical binding) Paper Type Paper Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine 528E Engine: M20B27, 2.7L (2693cc) SOHC Inline-6, featuring Bosch Motronic or L-Jetronic fuel injection (depending on specific market/build date). 535I Engine: M30B34, 3.4L (3430cc) SOHC Inline-6, typically equipped with Bosch Motronic fuel injection. Performance 528E Horsepower: Approx. 121-127 hp (depending on market and specific engine tune) 528E Torque: Approx. 170-174 lb-ft 535I Horsepower: Approx. 182-189 hp 535I Torque: Approx. 214-220 lb-ft Fuel System Injection System 528E: Bosch L-Jetronic or Motronic (depending on model year and region) Injection System 535I: Bosch Motronic Ignition System Ignition Type: Electronic ignition controlled by Motronic/L-Jetronic ECU. 🔧 Transmission Standard 528E Transmission: 4-speed automatic (e.g., ZF 4HP22) 535I Transmission: 5-speed manual (Getrag 260/5) Optional 528E Transmission Option: 5-speed manual (Getrag 260/5) 535I Transmission Option: 4-speed automatic (e.g., ZF 4HP22) Features Electronic Control: Automatic transmissions feature electronic control (TCU) for shift points and logic. 📐 Dimensions Exterior Length: Approx. 191.1 in (4854 mm) Width: Approx. 68.3 in (1735 mm) Height: Approx. 55.4 in (1407 mm) Weights Curb Weight 528E: Approx. 3250-3400 lbs (1474-1542 kg) Curb Weight 535I: Approx. 3400-3550 lbs (1542-1610 kg) 🛡️ Safety Features Ratings Crash Test Data Availability: Specific NHTSA/IIHS ratings for 1986 models may be limited; refer to contemporary road tests for general safety impressions. Active Features Braking System: Four-wheel disc brakes (vented front, solid rear). ABS (Anti-lock Braking System) was an optional feature on later E28 models, potentially available on late '86 cars. Passive Features Seat Belts: Three-point front seat belts, lap belts in rear. Headrests: Front and rear headrests. Rollover Protection: Reinforced A-pillars and roof structure. 💡 Technology Features Infotainment Audio System: Factory AM/FM stereo cassette player, often with premium speaker options. Limited integration with external devices by modern standards. Driver Assistance ABS Availability: Optional Anti-lock Braking System (ABS) available on some later models. Climate Control HVAC System: Manual or optional automatic climate control with A/C. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000-7,500 miles or...