Engine:
        
        
            Detailed diagnosis, repair, overhaul, performance tuning for M50B25 engine
        
     
    
        
            Fuel System:
        
        
            EFI, fuel pump, injectors, pressure regulator, tank and lines
        
     
    
        
            Cooling System:
        
        
            Radiator, thermostat, water pump, hoses, fan, coolant specifications
        
     
    
        
            Ignition System:
        
        
            Distributor, coils, spark plugs, ignition timing, DME control
        
     
    
        
            Exhaust System:
        
        
            Catalytic converter, mufflers, pipes, oxygen sensors
        
     
    
        
            Transmission Manual:
        
        
            Clutch, gearbox, shift linkage, fluid specifications, repair procedures
        
     
    
        
            Transmission Automatic:
        
        
            Repair, overhaul, torque converter, electronic control, fluid specifications
        
     
    
        
            Drivetrain Rear Axle:
        
        
            Differential, driveshaft, CV joints, axle shafts, fluid specifications
        
     
    
        
            Suspension Front:
        
        
            Struts, control arms, ball joints, bushings, alignment specifications
        
     
    
        
            Suspension Rear:
        
        
            Multi-link, shocks, springs, bushings, alignment specifications
        
     
    
        
            Steering System:
        
        
            Power steering pump, rack and pinion, steering column, fluid type
        
     
    
        
            Brake System:
        
        
            Front/rear discs, ABS, calipers, master cylinder, brake fluid type, bleeding procedures
        
     
    
        
            Wheels And Tires:
        
        
            Bolt pattern, torque specs, tire sizes, pressure recommendations
        
     
    
        
            Body Exterior:
        
        
            Body panels, doors, bumpers, glass, trim, rust repair
        
     
    
        
            Body Interior:
        
        
            Seats, dashboard, trim panels, headliner, carpet, sound deadening
        
     
    
        
            Electrical System:
        
        
            Battery, alternator, starter, wiring diagrams, fuses, relays
        
     
    
        
            Lighting System:
        
        
            Headlights, taillights, interior lights, bulb types
        
     
    
        
            HVAC System:
        
        
            Heater core, A/C compressor, blower motor, refrigerant type, operation
        
     
    
        
            Comfort Controls:
        
        
            Power windows, locks, mirrors, seats, sunroof
        
     
    
        
            Diagnostics And Troubleshooting:
        
        
            Systematic fault finding, diagnostic trouble codes (DTCs), connector pinouts
        
     
    
    
        
            Maintenance Tasks:
        
        
            Oil changes, filter replacements, fluid checks/flushes, tune-ups, belt/hose replacement
        
     
    
        
            Repair Procedures:
        
        
            Engine rebuild, transmission overhaul, brake pad/rotor replacement, suspension component replacement
        
     
    
        
            Overhaul Instructions:
        
        
            Detailed steps for complete engine, transmission, and differential rebuilds
        
     
    
        
            Recalibration Procedures:
        
        
            Idle speed adjustment, throttle body cleaning and adjustment
        
     
    
        
            Diagnostic Procedures:
        
        
            Step-by-step guides for diagnosing common and uncommon issues
        
     
    
        
            Wiring Diagrams:
        
        
            Comprehensive schematics for all major electrical systems
        
     
    
        
            Special Tool Requirements:
        
        
            Identification and usage of specialized BMW tools
        
     
    
    
        
            Diagnostic Depth:
        
        
            Advanced diagnostics covering DME (Digital Motor Electronics) and ABS controllers
        
     
    
        
            Repair Complexity:
        
        
            Suitable for DIY enthusiasts to professional mechanics, covering everything from routine maintenance to full engine/transmission rebuilds
        
     
    
        
            Specification Detail:
        
        
            Includes torque specifications, clearances, fluid capacities, and electrical resistance values
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Every 7,500-10,000 miles or annually, whichever comes first (depending on oil type and driving conditions)
        
     
    
        
            Coolant Flush Interval:
        
        
            Every 2-3 years or 30,000-50,000 miles
        
     
    
        
            Transmission Fluid Change Manual:
        
        
            Recommended at 60,000-100,000 miles, or as per manual inspection
        
     
    
        
            Transmission Fluid Change Automatic:
        
        
            Recommended every 40,000-60,000 miles
        
     
    
        
            Spark Plug Replacement:
        
        
            Every 30,000-60,000 miles, depending on plug type (copper vs. platinum)
        
     
    
        
            Drive Belt Replacement:
        
        
            Inspect every 30,000 miles, replace as needed or at 60,000-100,000 miles
        
     
    
    
        
            Engine Oil Type:
        
        
            Synthetic 5W-30 or 5W-40 (BMW LL-01 approved or equivalent)
        
     
    
        
            Engine Oil Capacity:
        
        
            6.5 Liters (6.9 US Quarts) with filter
        
     
    
        
            Coolant Type:
        
        
            BMW Blue Antifreeze or equivalent (50/50 mix with distilled water)
        
     
    
        
            Brake Fluid Type:
        
        
            DOT 4 (low viscosity)
        
     
    
    
        
            Cooling System Failures:
        
        
            Plastic expansion tanks, water pumps, and hoses prone to cracking/leaking
        
     
    
        
            Oil Filter Housing Gasket Leak:
        
        
            Common leak point leading to oil residue on engine block
        
     
    
        
            Vanos System:
        
        
            Early models (pre-1993) may have issues with the Variable Valve Timing (VANOS) solenoid or seals, causing rough idle or loss of low-end torque
        
     
    
        
            Suspension Bushings:
        
        
            Control arm bushings and rear subframe bushings can wear, leading to clunks and poor handling
        
     
    
        
            Window Regulators:
        
        
            Plastic components in window regulators can break
        
     
    
        
            ABS Sensor Failure:
        
        
            ABS sensors on wheel hubs can fail, leading to ABS and sometimes speedometer issues