The BMW R 1150 GS, produced in 2003, represents a significant entry in the adventure touring motorcycle segment. Building upon BMW Motorrad's extensive heritage in motorcycle engineering, this model, codenamed R21, features a robust 1130 cc, air/oil-cooled, four-stroke Boxer Twin engine. Known for its versatility and capability on both paved roads and light off-road terrain, the R 1150 GS is celebrated for its durability and suitability for long-distance travel. Its design emphasizes a balance of performance, with approximately 85 horsepower and 72 lb-ft of torque, and practical features, including a 6-speed manual transmission and shaft drive, making it a highly regarded machine among riders. This comprehensive factory service repair manual provides detailed information for the BMW R 1150 GS (2003). Covering all essential systems from engine and drivetrain to chassis and electrical components, it offers complete factory-level detail suitable for professional technicians and owners alike. The manual includes step-by-step repair instructions, diagnostic procedures for common issues such as Hall sensor or throttle position sensor calibration, and routine maintenance guidelines for oil changes and valve clearances. With its searchable format, detailed illustrations, diagrams, and photos, this resource empowers users to perform servicing and repairs efficiently, potentially saving on labor costs. 🏷️ Basic Information Identification Make: BMW Model: R 1150 GS Year: 2003 Vehicle Type: Motorcycle Generation Generation Code: R21 Codes Engine Code: M259 👋 Introduction Market Position Target Audience: BMW R 1150 GS 2003 Owners, DIY Mechanics, Professional Technicians Competitive Analysis Manual Authenticity: Actual Genuine Repair Service Factory Manuals (Not 3rd party) Key Features Value Proposition: Save $50-$60 per hour on shop labor costs; empowers owners to perform servicing themselves Search Functionality: Searchable PDF for quick information retrieval Instructional Design: Step-by-step instructions, numbered instructions, detailed illustrations, diagrams, and photos 📋 Manual Details Coverage Areas Coverage Scope: Complete Factory Service Repair Page Count Estimated Page Count: Hundreds of pages (exact number not specified, but substantial) Manual Type Manual Type: Factory Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Systems: General Information, Fuel System, Cooling System, Engine Top End, Engine Lubrication System, Crankshaft/Transmission Drivetrain Systems: Clutch, Crankshaft/Transmission, Wheels/Tires, Final Drive Chassis Systems: Brakes, Suspension, Steering, Frame Electrical Systems: Electrical System, Wiring Diagrams Auxiliary Systems: Appendix Procedures Included Diagnostic Procedures: Engine Fault Symptom Diagnosis, Advanced Troubleshooting Guide, Electrical System Diagnosis Maintenance Procedures: Fundamentals of Maintaining, Routine Servicing, Common Fixes Repair Procedures: Step-by-step Repair Instructions, Full Repair, Rebuild, Refurbish, Restore Procedures Testing Procedures: Part Testing using Mechanic Techniques Technical Depth Technical Depth: Complete Factory Level Detail, Suitable for Professional Technicians and Mechanics 📊 Manual Specifications File Format File Format: PDF Print Quality Printability: Printable without restriction (entire manual or selected pages) Binding Type Binding Type: N/A (Digital Download - Printable) Paper Type Paper Type: N/A (Digital Download - Printable) Software Requirements Required Software: Adobe PDF Reader Compatibility Operating Systems: Windows, macOS Delivery Method Delivery: Download link on checkout page after payment ⚙️ Engine Specifications Primary Engine Engine Type: Air/Oil-Cooled, Four-Stroke, Boxer Twin Displacement: 1130 cc (69 cu in) Bore X Stroke: 101 mm x 70.5 mm (3.98 x 2.78 in) Compression Ratio: 9.0:1 Performance Horsepower: 85 hp (63 kW) at 6,750 rpm (approximate) Torque: 72 lb-ft (98 Nm) at 5,250 rpm (approximate) Fuel System Fuel Delivery: Electronic Fuel Injection (Bosch Motronic 2.4) Fuel Type: Unleaded Gasoline, Premium (95 RON) Cooling System Cooling Method: Air cooling with oil cooling circuits 🔧 Transmission Standard Transmission Type: 6-speed Manual Features Clutch Type: Single Dry Plate Clutch Final Drive: Shaft Drive 📐 Dimensions Exterior Length: 2,255 mm (88.8 in) Width: 910 mm (35.8 in) (including mirrors) Height: 1,425 mm (56.1 in) (without windscreen) Weights Dry Weight: 232 kg (511.5 lbs) Gross Vehicle Weight Rating: 450 kg (992 lbs) 🛡️ Safety Features Active Features Braking System: BMW Motorrad Integral ABS (optional, but common on R1150GS) Front Brake: Dual 305 mm (12.0 in) discs with 4-piston calipers Rear Brake: Single 276 mm (10.9 in) disc with 2-piston caliper 💡 Technology Features Infotainment Instrumentation: Analog Tachometer, Digital Speedometer, Gear Indicator, Odometer, Trip Meter, Clock, Fuel Gauge, Warning Lights Driver Assistance ABS System: BMW Motorrad Integral ABS (optional feature, requiring specific maintenance procedures in the manual) Connectivity Diagnostic Interface: BMW proprietary diagnostic connector (requiring specific tools or adapters for advanced diagnostics, detailed in manual) 🔧 Maintenance Service Intervals Oil Change Interval: Refer to manual (typically 10,000 km or annual) Valve Clearance Check: Refer to manual (typically 20,000 km or as needed) Fluid Specifications Engine Oil Type: Refer to manual (e.g., SAE 20W-50 or 15W-50, API SG/SH/SJ) Engine Oil Capacity: Approximately 3.0 liters (3.2 US qt) with filter change Brake Fluid Type: DOT 4 Gearbox Oil Type: Refer to manual (e.g., SAE 75W-90, API GL-5) Final Drive Oil Type: Refer to manual (e.g., SAE 80W-90, API GL-5) Known Issues Common Issues Overview: Potential for Hall sensor...