Engine Mechanical:
Engine assembly, cylinder head, block, crankshaft, pistons, connecting rods, camshafts, valve train, lubrication system, cooling system, fuel injection, ignition system, emissions control
Engine Management:
DME (Digital Motor Electronics) control unit, sensors (crankshaft, camshaft, oxygen, MAF, MAP, coolant temp, knock), actuators (injectors, ignition coils, VANOS), diagnostic trouble codes (DTCs)
Transmission:
Automatic Transmission (GM A5S360R/A5S325Z), Manual Transmission (ZF GS6-37BZ), clutch, driveshafts, differential, xDrive all-wheel drive system
Suspension:
Front suspension (MacPherson strut, control arms, anti-roll bar), rear suspension (multi-link), shock absorbers, springs, bushings, steering system (rack and pinion, power steering pump, fluid)
Brakes:
Front and rear disc brakes, ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), brake calipers, rotors, pads, lines, master cylinder, brake fluid specifications
Electrical System:
Battery, alternator, starter motor, wiring harnesses, fuses, relays, lighting (headlights, taillights, interior), instrumentation, body control module (BCM), comfort electronics
Body And Chassis:
Body panels, doors, hood, trunk, bumpers, glass, seals, underbody, chassis components, welding procedures, corrosion protection
HVAC System:
Air conditioning, heater core, blower motor, climate control unit, refrigerant handling, cabin air filter replacement
Airbags:
Airbag system, SRS control module, occupant sensors, airbag deployment procedures, safety precautions
Routine Maintenance:
Oil and filter change, air filter replacement, cabin air filter replacement, spark plug replacement, brake fluid flush, coolant flush, differential fluid change, transmission fluid change
Engine Repair:
Engine timing, VANOS system repair, head gasket replacement, piston and ring replacement, bearing replacement, oil pump service
Transmission Repair:
Automatic transmission overhaul, valve body service, torque converter replacement, manual transmission clutch replacement, gearbox rebuild
Brake System Service:
Brake pad and rotor replacement, caliper service, bleeding procedure, ABS module diagnosis and replacement
Suspension And Steering Repair:
Control arm replacement, shock absorber and strut replacement, tie rod end replacement, power steering pump replacement, wheel alignment specifications
Electrical Troubleshooting:
Wiring diagram interpretation, component testing, fuse and relay diagnosis, CAN bus communication troubleshooting
Diagnostics:
OBD-II scanning, diagnostic trouble code retrieval and interpretation, live data analysis, component testing with diagnostic tools
Depth:
Comprehensive: Covers everything from basic maintenance to complete engine and transmission rebuilds, including advanced diagnostic procedures and wiring diagrams.
Oil Change Interval:
Variable Service Indicator (VSI) system, typically 7,500-15,000 miles or 12-24 months, depending on driving conditions.
Spark Plug Replacement:
Recommended around 60,000 miles for iridium-tipped plugs (if equipped).
Brake Fluid Flush:
Every 2 years regardless of mileage.
Coolant Flush:
Initial change at around 4 years or 100,000 miles, then every 2 years or 30,000 miles thereafter.
Engine Oil Specification:
BMW Longlife-01 (LL-01) synthetic oil, typically 5W-30 or 0W-30.
Coolant Specification:
BMW Blue Antifreeze/Coolant (G48 ethylene glycol based)
Power Steering Fluid:
Pentosin CHF 11S or ZF Servotronic fluid
Cooling System:
Plastic expansion tank cracking, water pump failures, thermostat housing leaks.
Engine:
Oil filter housing gasket leaks, CCV (Crankcase Ventilation) system failures leading to oil consumption and vacuum issues, VANOS solenoid failures.
Suspension:
Control arm bushings (RTABs), front sway bar links, rear subframe bushings.
Electrical:
ABS/DSC wheel speed sensor failures, alternator failure, door seal water ingress impacting electronics.