Engine Maintenance:
Complete overhaul, tune-up, diagnostics, lubrication
Engine Mechanical:
Engine block, cylinder head, pistons, crankshaft, camshafts, timing systems
Fuel System:
Fuel pumps, injectors, fuel lines, pressure regulators, fuel injection system service
Emission Control:
Catalytic converters, EGR systems, evaporative emission control
Cooling System:
Radiator, water pump, thermostat, cooling fan, hoses, coolant specifications
Lubrication System:
Oil pump, oil filter, oil cooler, oil specifications and capacities
Ignition System:
Spark plugs, ignition coils, distributors, ignition timing specifications
Charging System:
Alternator, voltage regulator, battery maintenance and testing
Transmission Auto:
Automatic transmission overhaul, fluid service, diagnostics, control systems
Transmission Manual:
Manual transmission overhaul, clutch service, gearbox repair
Drivetrain:
Driveshaft, universal joints, differential, axle shafts, bearing service
Suspension:
Front and rear suspension components, shock absorbers, springs, bushings, alignment specifications
Wheels And Tires:
Tire pressure specifications, wheel balancing, lug nut torque values
Brake System:
Front and rear brakes (disc/drum), calipers, rotors, brake pads, hydraulic system, brake fluid specifications
Parking Brake:
Parking brake mechanism adjustment and repair
Steering System:
Steering column, steering gear, power steering pump, hoses, fluid specifications, steering linkage
Air Conditioning:
AC system components, refrigerant handling, diagnostics, service procedures
Restraint Systems:
Supplemental Restraint System (SRS) components, seat belt mechanisms
Body And Interior:
Door mechanisms, locks, hinges, glass, mirrors, seats, interior trim panels
Electrical System:
Wiring schematics, component testing, fuse box diagrams, relays, lighting, power windows, central locking
Instrumentation:
Instrument cluster diagnostics and repair, warning lights
Wipers And Washers:
Wiper motor, washer pump, wiper blades, washer fluid system
Cruise Control:
Cruise control system operation and repair
Audio Visual:
Radio, speakers, antenna system (for the era)
Multiplex Communication:
Wiring and diagnostics for any multiplexed systems of the era
Maintenance Procedures:
Scheduled maintenance, fluid changes, filter replacements, lubrication
Diagnostic Procedures:
Troubleshooting guides, symptom-based diagnostics, testing of components
Repair Procedures:
Step-by-step instructions for all mechanical and electrical repairs
Rebuild Procedures:
Detailed instructions for engine, transmission, and differential rebuilds
Installation Procedures:
Guidance on installing replacement parts and accessories
Depth:
Factory-level technical detail suitable for professional technicians and advanced DIY enthusiasts
Visual Aids:
Diagrams, illustrations, and wiring schematics
Oil Change Interval:
Typically every 10,000-15,000 km (6,000-9,000 miles) or annually, depending on driving conditions.
Major Service Interval:
Spark plug replacement, timing belt/chain check (depending on engine variant) around 40,000-60,000 km (25,000-37,000 miles).
Engine Oil Spec:
API SG/SH, SAE 10W-40 or 15W-50 often recommended for the era, check manual for specific BMW approvals.
Coolant Spec:
BMW Blue Coolant or equivalent ethylene glycol based coolant with corrosion inhibitors. (Check manual for exact BMW part number).
Brake Fluid Spec:
DOT 3 or DOT 4
Transmission Fluid Auto:
Dexron II or equivalent (ZF approved)
Common Issues E23:
Cooling system leaks (hoses, water pump), fuel injection system issues (injectors, sensors), power window regulators, sunroof drainage clogs, ABS sensor failures, differential seal leaks.
Oil Filter:
Specific part numbers will be detailed in the manual, e.g., Mann Filter W 940/11 or equivalent BMW P/N.