🏷️ Basic Information Identification Make: BMW Model: 5 Series Year: 1990 Codes Chassis Code: E34 👋 Introduction Market Position Segment: Executive/Luxury Sedan Competitive Analysis Key Competitors: Mercedes-Benz W124 E-Class, Audi V8/100, Lexus LS 400, Cadillac DeVille. Key Features Vehicle Attributes: Renowned for driving dynamics, build quality, comfortable interior, and advanced engineering for its era. 📋 Manual Details Coverage Areas General Coverage: Comprehensive repair, maintenance, rebuilding, refurbishing, and restoration of the 1990 BMW 5 Series. Engine Variants: Covers BMW 525i, 530i, and 535i models equipped with M20 and M30 inline-six engines. May include specific sub-models or packages if present in 1990. Page Count Estimated Pages: 1000+ Manual Type Type: Full Service Repair Manual Language Language: English Format Format: Digital (PDF implied, print quality typical of service manuals) 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed overhaul procedures, component specifications, timing adjustments, cylinder head repair, crankshaft and piston assembly, oil pump, oil cooler. Engine Management: Fuel injection systems (DME), ignition systems, sensors (MAF, O2, Crankshaft Position), ECU diagnostics, emission controls, troubleshooting fuel delivery and ignition faults. Transmission Manual: Clutch assembly, gearbox overhaul, shift linkage, torque specifications, internal component replacement, fluid specifications. Transmission Automatic: Transmission identification, hydraulic system, torque converter, valve body overhaul, electronic control unit (EGS) diagnostics, fluid and filter replacement procedures, shifting issues troubleshooting. Suspension: Front and rear suspension component replacement (control arms, ball joints, tie rods, shocks, struts, springs), wheel alignment specifications, bushing replacement, troubleshooting noise and handling issues. Brakes: Brake system diagnosis, hydraulic system components (master cylinder, brake lines, calipers, wheel cylinders), brake pad and rotor replacement, ABS system troubleshooting, brake bleeding procedures, parking brake adjustments. Electrical System: Wiring diagrams, fuse and relay box locations and functions, battery and charging system, starter motor, alternator, lighting circuits (headlights, taillights, interior), horn, wipers, power windows, power mirrors, central locking system. Climate Control: HVAC system operation, refrigerant charging procedures, A/C compressor, blower motor, heater core, evaporator, climate control module diagnostics, troubleshooting cooling and heating performance. Body And Chassis: Body panel removal and installation, door mechanisms, hood and trunk latches, interior trim, sound deadening, chassis identification, corrosion prevention. Instrument Cluster: Diagnosis and repair of speedometer, tachometer, fuel gauge, coolant temperature gauge, and warning lights. Procedures Included Routine Maintenance: Oil and filter changes, air filter replacement, spark plug replacement, coolant flush and fill, transmission fluid and filter change, brake fluid flush, power steering fluid check. Troubleshooting: System-specific diagnostic flowcharts, symptom-based troubleshooting guides, common fault identification for engine, transmission, brakes, electrical, and HVAC. Component Rebuild: Detailed instructions for overhauling engines, transmissions, steering racks, brake calipers, alternators, starter motors, and other major components. Diagnostic Procedures: On-board diagnostics (OBD-I related for the era), sensor testing, actuator testing, ECU readouts (where applicable), electrical testing using multimeters and oscilloscopes. Fuel System Repair: Fuel pump replacement, fuel injector cleaning and replacement, fuel pressure regulator testing, fuel filter replacement. Exhaust System: Catalytic converter replacement, muffler and exhaust pipe repair/replacement, exhaust manifold gasket replacement. Steering System: Power steering pump replacement, steering rack overhaul/replacement, tie rod end replacement, steering fluid flush. Body Hardware: Door handle adjustment and replacement, mirror replacement, sunroof mechanism service, trunk and hood strut replacement. Lighting Repair: Headlight bulb replacement, taillight assembly repair, fog light service, interior dome light replacement. Interior Trim: Removal and installation of dashboard components, door panels, center console, and seating for access to components. Alternator Replacement: Removal and installation of the alternator, belt tensioning, and basic electrical testing. Starter Motor: Removal and installation of the starter motor and solenoid. Technical Depth Depth: Expert-level, suitable for professional mechanics and advanced DIY enthusiasts. Covers complete vehicle teardown and reassembly. Diagnostic Tools: Instructions on using basic diagnostic tools like multimeters, test lights, and pressure gauges. May include information for BMW-specific diagnostic tools of the era. 📊 Manual Specifications File Format File Type: Likely PDF; ensures searchability and digital accessibility. Print Quality Image Resolution: High resolution for clear diagrams and illustrations. Binding Type Binding: N/A (Digital Format) Paper Type Paper Quality: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Options: M20 2.5L Inline-6 (525i), M30 3.0L Inline-6 (530i), M30 3.5L Inline-6 (535i), M50 2.5L/2.0L Inline-6 (later 525i/520i models, may overlap with 1990 depending on market introduction). 525I Engine Code: M20B25 535I Engine Code: M30B35 Performance 535I Horsepower: Approx. 208 hp @ 5700 rpm 535I Torque: Approx. 224 lb-ft @ 4000 rpm Fuel System Injection Type: Bosch Motronic fuel injection (specific version varies by engine) 🔧 Transmission Standard Transmission Options: Getrag 260 5-speed manual transmission Optional Transmission Options: ZF 4HP22 4-speed automatic transmission Features Automatic Control: Electronic control of shift points and transmission behavior (EGS on later models). 📐 Dimensions Exterior Wheelbase: 111.7 inches (2837 mm) Length: 189.4 inches (4811 mm) Weights Curb Weight: Approx. 3500-3800 lbs (depending on engine and options) 🛡️ Safety Features Ratings Crash Test Era: Data from the era is not directly comparable to modern NHTSA/Euro...