Engine Management:
Detailed coverage of the M50B25 engine, including fuel injection, ignition, and emission control systems.
Cooling System:
Includes radiator, thermostat, water pump, and coolant flow diagrams.
Lubrication System:
Oil pump, oil filter, oil passages, and oil change procedures.
Exhaust System:
Catalytic converter, mufflers, exhaust manifold, and pipe routing.
Fuel System:
Fuel pump, fuel injectors, fuel pressure regulator, and fuel tank service.
Drivetrain:
Manual and automatic transmission service, clutch, driveshaft, and differential.
Steering System:
Power steering pump, rack and pinion, steering column, and alignment procedures.
Braking System:
ABS (Anti-lock Braking System) components, brake pads, rotors, calipers, hydraulic lines, and bleeding procedures.
Suspension System:
Front and rear suspension components, shock absorbers, springs, control arms, bushings, and alignment specifications.
HVAC System:
Air conditioning, heating, climate control, and blower motor service.
Body And Interior:
Door mechanisms, window regulators, seat adjustments, trim removal, and panel fitting.
Lighting System:
Headlights, taillights, interior lights, and related electrical circuits.
Chassis And Frame:
Body structural components and repair information.
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, and belt inspections.
Engine Overhaul:
Engine disassembly, inspection, repair, and reassembly procedures.
Transmission Repair:
Detailed steps for repairing and rebuilding both manual and automatic transmissions.
Brake System Service:
Replacement of brake pads, rotors, calipers, and bleeding the hydraulic system.
Suspension Component Replacement:
Replacing shock absorbers, struts, control arms, ball joints, and bushings.
Electrical Troubleshooting:
Diagnosing and repairing common electrical faults using wiring diagrams.
Fuel System Cleaning:
Injector cleaning and fuel system component diagnostics.
Cooling System Flushing:
Proper procedures for flushing and refilling the cooling system.
Diagnosing Engine Performance Issues:
Step-by-step guides for identifying causes of poor engine performance.
Body Panel Alignment And Repair:
Information on door, hood, and trunk panel adjustments and minor body repairs.
ABS System Diagnostics:
Troubleshooting ABS warning lights and system failures.
HVAC System Repair:
Repair of air conditioning and heating components.
Depth:
Comprehensive, suitable for professional mechanics and advanced DIY enthusiasts.
Diagnostic Codes:
Includes procedures for reading and interpreting diagnostic trouble codes (DTCs).
Component Testing:
Specific testing procedures and specifications for individual components.
Torque Specifications:
Detailed torque values for critical fasteners.
Clearances And Tolerances:
Precise measurements for engine components and other parts.
Oil Change Interval:
Typically every 7,500 - 10,000 miles (12,000 - 16,000 km) or annually, depending on driving conditions and oil type used.
Coolant Change Interval:
Every 2-3 years or as recommended by the manual, using BMW-approved coolant.
Spark Plug Replacement:
Around 60,000 miles (100,000 km), typically using NGK BKR6EK or equivalent.
Brake Fluid Flush:
Every 2 years, regardless of mileage.
Engine Oil:
BMW Longlife-01 or equivalent synthetic oil, SAE 5W-30 or 5W-40 recommended. Capacity approx. 6.5 quarts (6.2 liters).
Coolant:
BMW Blue/Green coolant or G48 (Ethylene Glycol based), mixed 50/50 with distilled water.
Transmission Fluid Manual:
MTF LT-2 or equivalent, API GL-4.
Transmission Fluid Automatic:
ATF Dexron III or equivalent.
Brake Fluid:
DOT 4 brake fluid.
Cooling System Failures:
Plastic coolant expansion tanks and radiator end tanks are prone to cracking; water pump impellers can degrade.
Heater Core Leaks:
Common failure point leading to coolant loss and fogged windows.
Window Regulator Failures:
Plastic clips and mechanisms can break, preventing windows from operating.
Subframe Mounts:
Rear subframe mounting points can crack the chassis sheet metal due to stress.
Oil Pan Gasket Leaks:
Age-related degradation leading to oil leaks.
ABS Sensor Failures:
Can lead to ABS and/or speedometer issues.