Engine Service:
Detailed procedures for M50B25 inline-six engine, including maintenance, diagnosis, and overhaul.
Fuel System:
Fuel injection system (Bosch Motronic), fuel pump, injectors, fuel pressure regulator, diagnostics.
Cooling System:
Radiator, water pump, thermostat, hoses, fan, coolant specifications, troubleshooting.
Lubrication System:
Oil pump, oil filter, oil pan, oil pressure diagnosis, oil specifications.
Exhaust System:
Exhaust manifold, catalytic converter, mufflers, oxygen sensors, emissions control.
Ignition System:
Spark plugs, ignition coils, ECU control, ignition timing, troubleshooting.
Transmission Service:
Manual and automatic transmission servicing, fluid changes, component replacement, diagnostics.
Drivetrain:
Driveshaft, universal joints, CV joints, differential, axle shafts, maintenance and repair.
Suspension:
Front and rear suspension components (struts, control arms, bushings, springs, shock absorbers), alignment procedures.
Steering System:
Power steering system, steering rack, tie rods, power steering fluid, troubleshooting.
Brake System:
Front and rear disc brakes, ABS system (Anti-lock Braking System), brake fluid, bleeding procedures, component replacement.
Electrical System:
Battery, charging system (alternator), starting system (starter motor), wiring diagrams, fuses, relays.
Lighting System:
Headlights, taillights, interior lighting, bulb replacement, circuit diagnosis.
HVAC System:
Heating, Ventilation, and Air Conditioning (HVAC) system components, refrigerant handling, diagnostics.
Body And Chassis:
Body panels, doors, hood, trunk, interior trim, chassis components, corrosion protection.
Safety Systems:
Airbag system components and diagnostics, seatbelt mechanisms.
Routine Maintenance:
Oil changes, filter replacements, fluid checks and top-offs, tire rotations, spark plug replacement.
Diagnostic Procedures:
Troubleshooting guides for common drivability, electrical, and mechanical issues.
Repair Procedures:
Step-by-step instructions for component removal, repair, and installation for all major vehicle systems.
Engine Rebuild:
Detailed procedures for engine disassembly, inspection, machining recommendations, and reassembly.
Transmission Overhaul:
Instructions for complete disassembly, inspection, and reassembly of both manual and automatic transmissions.
Brake Service:
Procedures for pad and rotor replacement, caliper service, brake fluid flush, and ABS bleeding.
Electrical Troubleshooting:
Use of wiring diagrams to diagnose and repair electrical faults.
Suspension Geometry Adjustment:
Alignment specifications and procedures.
Depth Of Coverage:
Comprehensive, covering everything from basic maintenance to complete component overhaul and diagnostics.
Diagnostic Tools:
Information likely includes diagnostic trouble codes (DTCs) and guidance on using BMW-specific diagnostic tools (e.g., DIS, GT1, although specific tool names may not be present in a general manual).
Torque Specifications:
Detailed torque values for all critical fasteners.
Wiring Diagrams:
Complete electrical schematics for all vehicle systems.
Special Tools:
Identification and usage of specialized tools required for certain repair procedures.
Oil Change Interval:
Typically every 7,500-10,000 miles or 12 months, whichever comes first, depending on driving conditions and oil used. The manual will detail specific recommendations.
Spark Plug Replacement:
Refer to manual for specific mileage, often around 60,000 miles for standard plugs, potentially longer for platinum/iridium.
Coolant Flush:
Typically every 2-3 years or specific mileage interval outlined in the manual.
Engine Oil:
BMW Longlife-98 specification or equivalent synthetic oil, typically 5W-30 or 5W-40. Manual will confirm exact spec and capacity (approx. 6.5 quarts).
Transmission Fluid Manual:
API GL-4 or GL-5 gear oil, specific viscosity recommended in manual (e.g., 75W-90).
Transmission Fluid Automatic:
Dexron III or equivalent ATF fluid. Manual will specify exact type and capacity.
Brake Fluid:
DOT 3 or DOT 4 brake fluid. Manual will specify.
Power Steering Fluid:
Pentosin CHF 11S or equivalent hydraulic fluid. Manual will specify.
Cooling System Components:
Plastic expansion tanks prone to cracking, water pump bearing failures, thermostat housing leaks.
Suspension Bushings:
Wear in control arm bushings (bushings are often replaceable separately from the arm), rear subframe mounts.
Oil Leaks:
Valve cover gasket, oil pan gasket, oil filter housing gasket commonly known to leak.
Electrical Gremlins:
Corrosion in wiring harnesses and connectors, particularly in engine bay and door jambs, can lead to intermittent issues.
Vanos System:
Early VANOS systems can develop issues with seals and solenoids, affecting performance and fuel economy (if equipped).
Heater Control Valve:
Failure of the heater control valve can lead to inconsistent cabin heating.