Engine Mechanical:
Engine overhaul, cylinder head, block, pistons, crankshaft, camshaft, timing systems, lubrication, cooling
Engine Management:
Fuel injection (DME), ignition, emission controls, sensors, actuators, diagnostic trouble codes (DTCs)
Transmission Manual:
Clutch, gearbox overhaul, gearshift mechanism, bearings, seals
Transmission Automatic:
Torque converter, valve body, planetary gears, hydraulic system, electronic control (GM Steptronic/ZF)
Drivetrain:
Driveshafts, CV joints, differential, rear axle assembly
Suspension Front:
MacPherson struts, control arms, anti-roll bar, steering knuckles, bushings
Suspension Rear:
Multi-link independent suspension, trailing arms, shock absorbers, springs, bushings
Brakes:
Front/rear disc brakes, ABS system (Bosch/ATE), hydraulic lines, master cylinder, brake booster, caliper overhaul
Steering:
Power steering system, steering rack, tie rods, steering column, universal joints
Electrical System:
Battery, charging system, starter, alternator, fuses, relays, wiring diagrams (detailed schematics)
Body Exterior:
Body panels, doors, hoods, trunk lid, bumpers, glass, trim, rust prevention
Body Interior:
Seating, dashboard, HVAC controls, door panels, headliner, interior trim, carpeting
Heating Ventilation Air Conditioning:
HVAC system components, blower motor, evaporator, condenser, refrigerant system, climate control unit
Safety Systems:
Airbags (SRS), seatbelt pre-tensioners, occupant restraint systems
Routine Maintenance:
Oil changes, filter replacements, fluid checks, spark plug replacement, belt inspection/replacement
Component Diagnosis:
Step-by-step troubleshooting guides for common and uncommon issues
Repair Overhaul:
Detailed instructions for disassembling, repairing, and reassembling major components
Electrical Troubleshooting:
Use of multimeter, oscilloscopes, interpretation of wiring diagrams, tracing electrical faults
Torque Specifications:
Precise torque values for all critical fasteners
Special Tools:
Identification and usage of BMW-specific or recommended tools for certain procedures
Depth:
In-depth mechanical and electrical repair, diagnostic procedures, component rebuilding
Diagnostic Focus:
Emphasis on systematic diagnosis using factory procedures and specifications
Engine Code Examples:
M43B18, M43B19, M50B20, M50B25, M52B20, M52B25, M52B28, S50B30 (M3), S52B32 (M3)
Horsepower Range:
Approx. 115 HP (318i) to 321 HP (Euro-spec M3 Evolution)
Torque Range:
Approx. 170 Nm to 320 Nm
Injection Type:
Multi-point fuel injection (Bosch Motronic, Siemens DME)
Fuel Type:
Unleaded Gasoline (Petrol)
Layout:
Inline-four (I4) and Inline-six (I6)
Type:
Pressurized liquid cooling system
Oil Change Interval:
Typically every 7,500 - 10,000 miles (12,000 - 16,000 km) or annually, depending on driving conditions. Check oil level regularly.
Spark Plug Replacement:
Approx. 60,000 miles (100,000 km) for standard plugs, higher for long-life iridium plugs.
Coolant Flush:
Every 2-3 years or 30,000 miles (50,000 km).
Engine Oil Type:
BMW Longlife-01 (LL-01) or LL-98, SAE 5W-30 or 5W-40 depending on climate. Refer to manual for specific M-engine recommendations.
Coolant Type:
BMW Blue Antifreeze/Coolant (G48 Ethylene Glycol based, mixed 50/50 with distilled water)
Brake Fluid Type:
DOT 4, low viscosity (DOT 4 LV) is recommended.
Power Steering Fluid:
BMW Power Steering Fluid (Pentosin CHF 11 S or equivalent hydraulic fluid)
Manual Transmission Fluid:
API GL-4 or GL-5, SAE 75W-90 (e.g., Pentosin MTF 2)
Automatic Transmission Fluid:
BMW LT-3, ZF Lifeguardfluid 5, or equivalent ATF (Dexron III for some GM units)
Cooling System:
Plastic expansion tanks prone to cracking, water pump failure, thermostat issues.
Suspension:
Control arm bushings (RTABs), trailing arm bushings, shock mounts, ball joints wear out.
Electrical:
ABS/ASC sensor failures, instrument cluster pixelation, blower motor resistor failure, VANOS seal issues (M50/M52 engines).
Engine:
Oil leaks (valve cover gasket, oil pan gasket), fuel pump failure, coil pack failures.
Interior:
Headliner sagging, door panel adhesive failure, climate control display issues.
