🏷️ Basic Information Identification Make: BMW Model: 7 Series Model Code: E23 Year: 1986 Trim: 735i Generation Generation Name: First Generation E23 📋 Manual Details Coverage Areas Primary Coverage: Electronic Troubleshooting Secondary Coverage: General Maintenance, Engine Service/Repair, Transmission Service/Repair, Brake System, Wiring Diagram, Electrical System, Suspension, Periodic Lubrication, 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 Manual Type Unknown: Factory Service Repair Manual Language Unknown: English Format Unknown: PDF Delivery Unknown: Instant Download Requirements Software Requirements: Adobe PDF Reader, WinZip Compatibility Operating Systems: All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Name: M30B34 Engine Type: Inline 6-cylinder Displacement: 3.4 Liters (3430 cc) Bore X Stroke: 92 mm x 86 mm Compression Ratio: 8.0:1 or 8.5:1 (depending on market/variant) Valvetrain: SOHC (Single Overhead Camshaft) Engine Design: Naturally Aspirated Cooling Method: Liquid-cooled Performance Horsepower: Approx. 182-194 hp (varies by market/tuning) Torque: Approx. 220-230 lb-ft (varies by market/tuning) Fuel System Fuel Delivery: Bosch Motronic Fuel Injection Fuel Type: Unleaded Gasoline Ignition System: Electronic Ignition (Bosch) 🔧 Transmission Standard Transmission Type: 4-speed Automatic (ZF 4HP22) Optional Transmission Type: 5-speed Manual Features Transmission Control: Electronic Control (for automatic) 📐 Dimensions Exterior Length: Approx. 4900 mm (192.9 in) Width: Approx. 1800 mm (70.9 in) Height: Approx. 1400 mm (55.1 in) Wheelbase: Approx. 2800 mm (110.2 in) Front Overhang: Approx. 870 mm (34.3 in) Rear Overhang: Approx. 1230 mm (48.4 in) Weights Curb Weight: Approx. 1600-1700 kg (3527-3748 lbs) 🛡️ Safety Features Features Anti Lock Braking System: Standard (ABS) Airbags: Not standard for this year/model (optional on some later E23s) Seatbelts: All seating positions Restraint System: Seatbelts, potentially optional front airbags 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual (typically 5,000-7,500 miles or 6-12 months) Tune Up Interval: Refer to manual Fluid Specifications Engine Oil Type: Refer to manual (e.g., SAE 15W-40 or 20W-50 for ambient temperatures) Coolant Type: Ethylene Glycol based coolant (50/50 mix with distilled water) Brake Fluid Type: DOT 3 or DOT 4 Transmission Fluid Type: Dexron III (for automatic transmission) Power Steering Fluid Type: ATF (Automatic Transmission Fluid) or specific BMW power steering fluid Differential Fluid Type: API GL-5, SAE 75W-90 or 80W-90 Gear Oil