Engine Mechanical:
        
        
            Engine assembly, cylinder head, pistons, crankshaft, camshaft, timing, lubrication system, cooling system, fuel delivery, exhaust system
        
     
    
        
            Engine Management:
        
        
            Engine Control Unit (ECU), ignition system, fuel injection (Bosch Motronic), sensors, actuators, diagnostics, emissions control
        
     
    
        
            Transmission Manual:
        
        
            Clutch, gearbox, driveshafts, selector mechanism, fluid specifications
        
     
    
        
            Transmission Automatic:
        
        
            Automatic transmission assembly (e.g., ZF 4HP22), torque converter, hydraulic control, electronic control, fluid specifications
        
     
    
        
            Suspension Front:
        
        
            MacPherson struts, control arms, anti-roll bar, steering linkage, bushings, shock absorbers
        
     
    
        
            Suspension Rear:
        
        
            Independent multi-link suspension, control arms, trailing arms, shock absorbers, springs, bushings
        
     
    
        
            Brakes:
        
        
            Front and rear disc brakes, ABS system (Bosch ABS II), brake calipers, rotors, master cylinder, brake lines, fluid specifications
        
     
    
        
            Steering:
        
        
            Power steering system, steering rack, steering column, tie rods, fluid specifications
        
     
    
        
            Electrical System:
        
        
            Battery, alternator, starter motor, lighting system, wiring diagrams, fuses, relays, ECUs, instrument cluster, power windows, central locking
        
     
    
        
            Climate Control:
        
        
            Heating, ventilation, air conditioning (HVAC) system, refrigerant, compressor, blower motor, controls
        
     
    
        
            Body And Chassis:
        
        
            Body panels, doors, hood, trunk, glass, interior trim, structural components, rust prevention
        
     
    
        
            Fuel System:
        
        
            Fuel tank, fuel pump, fuel injectors, fuel filter, fuel pressure regulator
        
     
    
        
            Exhaust System:
        
        
            Exhaust manifolds, catalytic converter, muffler, exhaust pipes
        
     
    
    
        
            Routine Maintenance:
        
        
            Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement
        
     
    
        
            Engine Repair:
        
        
            Engine overhaul, gasket replacement, piston ring installation, valve guide replacement, bearing replacement
        
     
    
        
            Transmission Repair:
        
        
            Clutch replacement, transmission disassembly and reassembly, torque converter replacement, valve body service
        
     
    
        
            Brake System Overhaul:
        
        
            Brake pad and rotor replacement, caliper rebuilding, master cylinder replacement, brake bleeding, ABS diagnostics and repair
        
     
    
        
            Suspension And Steering Service:
        
        
            Component replacement (shocks, struts, control arms, tie rods), wheel alignment specifications, power steering system repair
        
     
    
        
            Electrical Diagnostics:
        
        
            Troubleshooting electrical faults, component testing, wiring harness repair, diagnostic trouble code (DTC) interpretation
        
     
    
        
            HVAC Service:
        
        
            Refrigerant recharge, leak detection, component replacement (compressor, evaporator, condenser), blower motor service
        
     
    
        
            Bodywork And Trim:
        
        
            Panel removal and installation, glass replacement, interior trim fitting, seal replacement
        
     
    
        
            Troubleshooting:
        
        
            Step-by-step diagnostic procedures for common and uncommon issues
        
     
    
        
            Technical Specifications:
        
        
            Torque values, clearances, fluid capacities, electrical resistance values
        
     
    
        
            Wiring Diagrams:
        
        
            Detailed, system-specific wiring schematics for electrical components and systems
        
     
    
    
        
            Depth Level:
        
        
            Comprehensive (from basic maintenance to complete engine and transmission rebuilds)
        
     
    
        
            Diagnostic Capability:
        
        
            Advanced diagnostic procedures, including information on fault codes and sensor readings
        
     
    
        
            Special Tools:
        
        
            Identification and usage of specialized tools required for certain procedures
        
     
 
    
    
    
        
            Oil Change:
        
        
            Every 7,500 - 10,000 miles or 12 months (depending on driving conditions and oil type used, consult manual for specific recommendations)
        
     
    
        
            Spark Plugs:
        
        
            Inspect every 30,000 miles, replace every 60,000 miles (use recommended OEM plugs)
        
     
    
        
            Coolant Flush:
        
        
            Every 2-3 years or 30,000 miles
        
     
    
        
            Transmission Fluid Automatic:
        
        
            Typically 'lifetime' fill, but proactive replacement every 60,000-100,000 miles is recommended for longevity.
        
     
    
        
            Transmission Fluid Manual:
        
        
            Every 50,000-60,000 miles
        
     
    
    
    
        
            Power Steering Fluid:
        
        
            BMW Power Steering Fluid (or ATF Dexron III)
        
     
    
    
        
            Engine Oil Leaks:
        
        
            Valve cover gasket, oil pan gasket, oil filter housing gasket
        
     
    
        
            Cooling System:
        
        
            Plastic coolant expansion tank can become brittle and crack, water pump failure
        
     
    
        
            Suspension:
        
        
            Worn control arm bushings, worn rear trailing arm bushings, sagging front springs
        
     
    
        
            Electrical:
        
        
            ABS sensor failures, headlight leveling system issues, door lock actuators, OBC (On-Board Computer) pixelation
        
     
    
        
            Fuel System:
        
        
            Fuel pump failure, clogged fuel injectors
        
     
    
        
        Maintenance Schedule Detail
    
 
    
        
            Major Service Points:
        
        
            Timing belt (if applicable to specific variants, M30 is chain-driven), coolant, brake fluid, transmission fluid, differential fluid, spark plugs, air filter, fuel filter.