Engine Mechanical:
Engine assembly, cylinder head, block, pistons, crankshaft, camshafts, lubrication system, cooling system, timing system.
Engine Performance:
Fuel delivery, ignition system, emission control, turbocharging (if applicable), engine management system (DME/ECU).
Transmission Manual:
Manual transmission service, clutch assembly, gearbox internal components, shift mechanism.
Transmission Automatic:
Automatic transmission service, torque converter, valve body, mechatronics, transmission control module (TCM).
Drivetrain:
Driveshafts, differentials, axles, universal joints, CV joints.
Suspension:
Front suspension (struts, control arms, ball joints, bushings), rear suspension (multi-link, subframe, shocks, springs).
Steering:
Power steering system, steering column, steering rack/gearbox, tie rods, wheel alignment procedures.
Brakes:
Brake system components (calipers, rotors, pads), hydraulic system, ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), parking brake.
Electrical System:
Battery, alternator, starter motor, wiring diagrams, fuses, relays, lighting systems (headlights, taillights, interior), power distribution.
Body And Chassis:
Body panels, doors, hood, trunk, convertible roof system, chassis structure, underbody protection.
Interior Trim:
Dashboard, seats, door panels, center console, trim removal and installation.
HVAC:
Heating, Ventilation, and Air Conditioning (HVAC) system components, refrigerant, diagnostics.
Infotainment And Electronics:
Infotainment system (iDrive), navigation, audio system, instrument cluster, keyless entry, alarm system.
Safety Systems:
Airbag system (SRS), seat belt pre-tensioners, seat belt maintenance.
Routine Maintenance:
Oil changes, filter replacements (oil, air, cabin), fluid checks and top-ups, spark plug replacement, brake pad/rotor replacement, tire rotation.
Diagnostics Troubleshooting:
Diagnostic trouble codes (DTCs) interpretation, common fault diagnosis, electrical system troubleshooting, engine performance issues.
Engine Repair:
Engine removal and installation, cylinder head gasket replacement, piston and connecting rod replacement, crankshaft and bearing replacement, valve guide and seal replacement.
Transmission Repair:
Transmission removal and installation, internal transmission component repair, clutch replacement, torque converter replacement.
Suspension Steering Repair:
Component replacement (shocks, struts, control arms, bushings, ball joints, tie rods), power steering pump replacement, steering rack overhaul.
Brake System Repair:
Brake caliper rebuilding, master cylinder replacement, brake line repair/replacement, ABS/DSC module diagnostics and replacement.
Electrical Diagnostics Repair:
Wiring harness repair, sensor testing and replacement, module programming and diagnostics, starter and alternator testing/replacement.
Bodywork And Interior:
Door hinge and latch adjustment, convertible top mechanism service, interior trim panel removal and installation, panel replacement.
HVAC Service:
Component replacement (compressor, condenser, evaporator), refrigerant charging procedures, leak detection.
Technical Specifications:
Torque specifications for all fasteners, fluid capacities and types, engine performance data, dimensions, electrical schematics.
Depth:
Comprehensive, covering all aspects from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostics and wiring diagrams.
Oil Change Interval:
BMW Condition Based Service (CBS) system typically recommends oil changes based on driving conditions, usually between 7,500 - 15,000 miles (12,000 - 24,000 km) or annually, whichever comes first.
Air Filter Replacement:
Recommended every 30,000 miles (48,000 km) or as indicated by CBS.
Cabin Filter Replacement:
Recommended every 15,000 miles (24,000 km) or annually.
Spark Plug Replacement N52:
Typically at 60,000 miles (96,000 km) for N52 engines using Long Life spark plugs (e.g., NGK SILZKR7C11S).
Spark Plug Replacement N54:
Typically at 45,000 miles (72,000 km) for N54 engines due to higher stress from turbocharging (e.g., NGK SILZKR7B11).
Brake Fluid Flush:
Recommended every 2 years, regardless of mileage.
Engine Oil Specification:
BMW Longlife-01 (LL-01) or BMW Longlife-04 (LL-04) compliant synthetic oil, typically 0W-30 or 5W-30 depending on climate and engine variant. Consult manual for precise spec.
Coolant Specification:
BMW Blue Antifreeze/Coolant (G48 specification) or equivalent. Typically a 50/50 mix with distilled water.
Brake Fluid Specification:
DOT 4 High Performance Brake Fluid.
Power Steering Fluid:
Pentosin CHF 11S or CHF 202 (Green fluid, check reservoir cap for exact type).
Common Issues N54 Engine:
High-pressure fuel pump (HPFP) failure, injector issues, turbocharger wastegate rattle/failure, oil leaks from valve cover gasket or oil filter housing.
Common Issues Convertible Top:
Hydraulic pump or cylinder leaks, motor failure, sensor issues affecting operation.
Common Issues Electrical:
Water ingress into modules (e.g., FRM module causing lighting issues), battery drain, sensor failures (e.g., ABS sensors).
Common Issues Suspension:
Worn control arm bushings, worn strut mounts, clunks from the rear subframe.