Engine Service:
Complete service and repair information for the M30 engine
Transmission Service:
Service and repair for automatic and manual transmissions
Brake System:
Diagnosis, maintenance, and repair of the braking system
Wiring Diagrams:
Comprehensive electrical wiring diagrams for all vehicle systems
Electrical System:
Detailed coverage of the vehicle's electrical components and circuits
Suspension:
Service and repair of front and rear suspension components
Periodic Lubrication:
Lubrication points, fluid types, and service intervals
Steering:
Diagnosis, maintenance, and repair of the steering system
Cooling System:
Service and repair of the cooling system, including radiators and thermostats
Fuel Injection:
Detailed information on the Bosch L-Jetronic fuel injection system
Fuel System:
Coverage of fuel pump, lines, and tank maintenance
Emission System:
Information related to emission controls and components
HVAC:
Heater and Air Conditioning system service and troubleshooting
Engine Control:
Diagnosis and troubleshooting of the engine control unit (ECU) and related systems
Chassis Body:
Bodywork, chassis structure, and related components
Restraint System:
Information on seat belts and other passive safety systems
Interior:
Interior trim, controls, and components
Differential Drive:
Service and maintenance of the differential and drivetrain
Axle:
Information on front and rear axles
Troubleshooting:
Systematic diagnosis and resolution of common and complex electronic issues
General Maintenance:
Routine checks, fluid changes, filter replacements
Engine Repair:
Detailed procedures for engine disassembly, inspection, and reassembly
Transmission Repair:
Overhaul and repair procedures for transmissions
Brake Service:
Brake pad replacement, caliper service, bleeding procedures
Electrical Component Testing:
Testing and diagnosis of electrical sensors, actuators, and control modules
Suspension Alignment:
Information on suspension component replacement and alignment specifications
Steering System Repair:
Power steering pump, rack, and linkage service
Cooling System Flushing:
Procedures for flushing and refilling the cooling system
Fuel Injection Diagnosis:
Troubleshooting of injectors, fuel pressure regulator, and related sensors
HVAC System Diagnosis:
Troubleshooting of climate control system faults
Chassis Inspections:
Inspection of structural components
Drive Axle Maintenance:
Service for drive shafts and CV joints
Depth:
Comprehensive factory-level detail, suitable for professional technicians and experienced DIY enthusiasts
Diagnostic Focus:
Emphasis on electronic systems, circuits, and fault diagnosis using diagrams and troubleshooting trees
Oil Change Interval:
Refer to manual; typically 7,500-10,000 miles (12,000-16,000 km) or 1 year
Spark Plug Replacement:
Refer to manual; typically 30,000 miles (48,000 km)
Engine Oil Type:
SAE 20W-50 or 15W-50 (depending on climate/service bulletin) API SG or higher
Coolant Type:
BMW Blue Antifreeze/Coolant (or equivalent ethylene glycol based)
Brake Fluid Type:
DOT 3 or DOT 4
Transmission Fluid Manual:
GL-4 or GL-5 Gear Oil (e.g., Castrol TWS) - Check specific viscosity
Transmission Fluid Auto:
Dexron II (or compatible)
Electrical Corrosion:
Corrosion in electrical connectors, especially grounds and engine bay wiring harnesses.
Fuel System Leaks:
Aging fuel lines, O-rings, and injector seals can lead to leaks.
Cooling System Failures:
Degradation of hoses, water pump failure, and radiator leaks are common.
Suspension Wear:
Worn control arm bushings, ball joints, and tie rods.
