🏷️ Basic Information Identification Make: BMW Model: 733i / 735i Model Codes: E23 Production Years Covered: 1983-1987 👋 Introduction Market Position Target Audience: Professional automotive technicians, DIY enthusiasts, BMW owners seeking in-depth maintenance and repair knowledge. Competitive Analysis Value Proposition: Offers the same level of detail and accuracy as OEM workshop manuals at a fraction of the cost, enabling comprehensive DIY repairs and accurate professional diagnostics. Key Features Completeness: Covers all models and trims within the specified production years, ensuring universal applicability for the E23 generation. Usability: Organized logically, with clear instructions, diagrams, and specifications, facilitating efficient use. 📋 Manual Details Coverage Areas Systems Covered: Engine mechanical, fuel, ignition, lubrication, cooling, exhaust, transmission (manual & automatic), driveline, suspension, steering, brakes (hydraulic & ABS), electrical system, climate control, body, interior, troubleshooting, diagnostics, maintenance schedules, specifications, torque values, wiring diagrams. Page Count Estimated Page Count: Approximately 1500+ Manual Type Type: Service Repair Workshop Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed procedures for engine removal/installation, cylinder head, valve train, pistons, connecting rods, crankshaft, timing components, oil pump, lubrication system. Engine Management: Fuel injection (Bosch L-Jetronic, Motronic), ignition system, emission controls, diagnostics and troubleshooting of sensors and actuators. Transmission: Both Getrag 5-speed manual and ZF 4-speed automatic transmission overhaul, repair, adjustment, and troubleshooting. Brakes: Front and rear brake system service, caliper overhaul, disc replacement, brake line repair, ABS system troubleshooting and component replacement. Electrical: Comprehensive wiring diagrams for all circuits, troubleshooting of starting/charging system, lighting, instruments, power accessories, fuse/relay identification and testing. Procedures Included Maintenance: Routine maintenance tasks such as oil changes, filter replacements, spark plug replacement, belt adjustments, fluid checks and changes, lubrication points. Troubleshooting: Systematic diagnostic procedures for common and uncommon issues, fault code identification (where applicable), symptom-based troubleshooting guides. Repair Overhaul: Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation for virtually all vehicle systems. Technical Depth Depth: Comprehensive, covering everything from basic fluid checks to complete engine and transmission overhauls, including advanced electrical diagnostics and body repair procedures. 📊 Manual Specifications File Format File Type: Portable Document Format (PDF) Searchability: Fully searchable text for quick access to information. Print Quality Print Resolution: High-resolution graphics and text, suitable for printing. Binding Type Binding Type: N/A (Digital Format) Paper Type Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code 733I: M30B32 (3.2L Inline-6) Engine Code 735I: M30B34 (3.4L Inline-6) Performance 733I Horsepower 733I: 181 hp @ 5500 rpm (approx.) Torque 733I: 215 lb-ft @ 3500 rpm (approx.) Performance 735I Horsepower 735I: 182 hp @ 5400 rpm (approx.) Torque 735I: 224 lb-ft @ 3600 rpm (approx.) Fuel System Injection System: Bosch L-Jetronic (early models) / Motronic (later models) Fuel Type: Unleaded gasoline (premium recommended) Engine Layout Configuration: Inline 6-cylinder, SOHC Bore X Stroke 733I: 89.0 mm x 84.0 mm Bore X Stroke 735I: 92.0 mm x 86.0 mm 🔧 Transmission Standard Transmission 733I: 4-speed manual (Getrag 265) Optional Transmission Optional: 4-speed automatic (ZF 4HP22) Transmission 735I: 5-speed manual (Getrag 265) or 4-speed automatic (ZF 4HP22) Features Clutch Type: Hydraulically operated single-plate dry clutch (manual) Automatic Transmission Fluid: Dexron II or equivalent (refer to manual for specific BMW part number) 📐 Dimensions Exterior Wheelbase: 2,830 mm (111.4 in) Length: 4,850 mm (190.9 in) Width: 1,798 mm (70.8 in) Height: 1,400 mm (55.1 in) Weights Curb Weight Approx: 1,600 - 1,750 kg (3,527 - 3,858 lbs) Gross Vehicle Weight Rating: Not explicitly specified, refer to vehicle placard. 🛡️ Safety Features Ratings Crash Test Data: Limited official crash test data available for this era, but designed with robust safety cage and crumple zones. Active Features ABS: Anti-lock Braking System (ABS) available as an option on most models, standard on later 735i. Passive Features Seatbelts: 3-point inertia reel seatbelts front and rear. Headrests: Adjustable front and rear headrests. Body Structure: Reinforced chassis and body construction for occupant protection. 💡 Technology Features Infotainment Audio System: Premium cassette stereo systems, often with advanced sound processing for the era. Optional CD players available later. Climate Control: Automatic climate control system, often featuring dual-zone capabilities. Driver Assistance Cruise Control: Standard cruise control system. Connectivity Early Features: Power windows, power locks, central locking, heated seats, power adjustable mirrors, optional sunroof. 🔧 Maintenance Service Intervals Oil Change Interval: Every 5,000 - 7,500 miles or 6-12 months (depending on driving conditions; refer to manual). Spark Plug Replacement: Typically every 30,000 miles, but consult manual for specific plug type and interval. Fluid Specifications Engine Oil Type: API SG or SH, SAE 15W-40 or 10W-40 (check manual for exact viscosity and BMW approval). Coolant Type: Ethylene glycol based antifreeze mixed 50/50 with distilled water (BMW approved). Brake Fluid Type: DOT 3 or DOT 4 hydraulic brake fluid. Known Issues Cooling System: Radiator leaks, heater core issues, thermostat housing leaks, fan clutch failure....