Engine Mechanical:
        
        
            Engine assembly, disassembly, rebuilding, cylinder head, pistons, crankshaft, camshaft, timing systems (chain/belt), lubrication, cooling
        
     
    
        
            Engine Performance:
        
        
            Fuel injection systems (direct and indirect), ignition systems, emissions control, engine management systems (DME), turbocharging/supercharging (where applicable)
        
     
    
        
            Transmission Manual:
        
        
            Manual gearbox repair, clutch system, shift mechanisms
        
     
    
        
            Transmission Automatic:
        
        
            Automatic transmission repair, valve body, torque converter, transmission control unit (TCU), fluid servicing
        
     
    
        
            Drivetrain:
        
        
            All-wheel drive (xDrive) system, differential (front, rear, center), drive shafts, axles, CV joints
        
     
    
        
            Suspension:
        
        
            Front and rear suspension components, shock absorbers, struts, springs, control arms, bushings, steering linkage
        
     
    
        
            Steering:
        
        
            Power steering system (hydraulic/electric), steering rack, steering column, wheel alignment specifications
        
     
    
        
            Brakes:
        
        
            Brake system overhaul, disc brakes, calipers, pads, rotors, ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), EBD (Electronic Brakeforce Distribution), brake fluid specifications
        
     
    
        
            Electrical System:
        
        
            Battery, alternator, starter motor, wiring diagrams, fuses, relays, lighting systems (headlights, taillights, interior), charging system
        
     
    
        
            Body And Chassis:
        
        
            Body panel removal/installation, doors, hood, trunk, bumpers, chassis structure, rust repair, corrosion prevention
        
     
    
        
            Interior:
        
        
            Dashboard removal, seats, upholstery, trim panels, climate control system (HVAC), audio systems, airbags
        
     
    
        
            Climate Control:
        
        
            HVAC system components, refrigerant handling, blower motor, climate control modules, cabin air filter replacement
        
     
    
        
            Infotainment And Electronics:
        
        
            iDrive system, navigation, audio components, dashboard displays, sensors, control modules (ECU, TCU, ABS module, etc.)
        
     
    
        
            Diagnostic Troubleshooting:
        
        
            Diagnostic trouble codes (DTCs), symptom-based troubleshooting guides, diagnostic tool usage (e.g., ISTA/D, DIS)
        
     
    
    
        
            Scheduled Maintenance:
        
        
            Oil changes, filter replacements (oil, air, cabin, fuel), spark plug replacement, fluid checks and changes (coolant, brake, power steering, transmission)
        
     
    
        
            Repair Procedures:
        
        
            Step-by-step instructions for all major repairs, component replacement, and system overhauls
        
     
    
        
            Troubleshooting:
        
        
            Systematic diagnosis of common and uncommon problems with detailed troubleshooting trees
        
     
    
        
            Inspections:
        
        
            Pre-purchase inspections, routine inspections, specific component checks
        
     
    
        
            Wiring Diagrams:
        
        
            Comprehensive electrical schematics for all vehicle systems
        
     
    
        
            Technical Data Specifications:
        
        
            Torque specifications, clearances, fluid capacities, pressure readings, diagnostic values
        
     
    
    
        
            Depth:
        
        
            Professional-level repair and diagnostic information
        
     
    
        
            Detail Level:
        
        
            Detailed photos, exploded diagrams, step-by-step instructions
        
     
    
        
            Rebuild Instructions:
        
        
            Complete engine and transmission rebuild procedures
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Variable, often indicated by Condition Based Service (CBS) system, typically 10,000-15,000 miles or annually
        
     
    
        
            Brake Fluid Flush:
        
        
            Every 2 years
        
     
    
        
            Coolant Flush:
        
        
            Initial: 4 years, then every 2 years thereafter (BMW Blue or similar approved coolant)
        
     
    
    
        
            Engine Oil:
        
        
            SAE 5W-30 or 5W-40 Synthetic, meeting BMW LL-01 or LL-04 specifications (check specific engine)
        
     
    
        
            Transmission Fluid Auto:
        
        
            BMW ATF LT-5 (e.g., Esso/Mobil LT 71141) or equivalent spec for GM 5-speed/6-speed auto
        
     
    
        
            Power Steering Fluid:
        
        
            Pentosin CHF 11S or equivalent
        
     
    
    
        
            Common Issues E60:
        
        
            Water pump/thermostat failures (especially with N52/N54), VANOS solenoids/seals, oil leaks (valve cover gaskets, oil pan gaskets), CCV system issues (N52), ignition coil failures, eccentric shaft sensor failure (N62), power steering leaks, EGS (transmission control module) failures, iDrive system glitches, active steering pump failure.