Engine Mechanical:
Complete engine overhaul, diagnosis, timing, seals, gaskets, cooling system, lubrication system, fuel injection (DME), emissions control (EVAP).
Engine Electrical:
Ignition system, starter, alternator, engine control module (DME), sensors (crankshaft, camshaft, knock, O2), wiring diagrams.
Transmission Manual:
Clutch, gearbox overhaul, shift linkage, gears, bearings, seals, fluid specifications.
Transmission Automatic:
Transmission overhaul, valve body, torque converter, electronic controls (GM A5S 325Z), solenoids, fluid specifications, diagnosis.
Drivetrain:
Driveshafts, CV joints, differential, rear axle, wheel bearings.
Suspension:
Front and rear suspension components, struts, shocks, control arms, bushings, springs, anti-roll bars, alignment specifications.
Brakes:
Hydraulic system, ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), brake pads, rotors, calipers, master cylinder, bleeding procedures, parking brake.
Steering:
Power steering system, steering rack, pump, hoses, steering column, alignment.
Electrical System:
Battery, charging system, lighting, fuses, relays, starter, ignition switch, body control module (BCM), comfort electronics.
Climate Control:
HVAC system, blower motor, evaporator, condenser, refrigerant, heater core, climate control module, A/C system diagnosis.
Interior Trim:
Dashboard removal, door panels, seats, headliner, center console.
Exterior Body:
Bumpers, fenders, hood, trunk, doors, glass replacement, body panel alignment, rust repair.
Safety Systems:
Airbags, seatbelt pretensioners, ABS, DSC.
Routine Maintenance:
Oil changes, filter replacements (oil, air, cabin), spark plug replacement, fluid checks and top-offs, brake inspections.
Troubleshooting:
Diagnostic trouble codes (DTCs), common symptoms and their causes, step-by-step diagnostic flowcharts for various systems.
Component Removal Installation:
Detailed instructions for removing and installing major and minor components across all systems.
Engine Rebuild:
Piston ring replacement, bearing inspection, cylinder head removal and installation, valve stem seals, timing chain service.
Transmission Service:
Fluid and filter changes, torque converter replacement, clutch replacement (manual), solenoid replacement (automatic).
Brake Service:
Brake pad and rotor replacement, caliper overhaul, brake fluid bleeding, ABS/DSC component testing.
Electrical Diagnostics:
Wiring harness repair, sensor testing, module programming (mention of ISTA/DIS compatibility implied), fuse and relay testing.
Suspension Repair:
Strut replacement, control arm bushing replacement, wheel bearing replacement, steering rack replacement.
Air Conditioning Service:
Refrigerant recharge, leak testing, component replacement (compressor, condenser, evaporator), evacuation and charging.
Bodywork Repairs:
Panel replacement, dent repair, door alignment, glass replacement, trim removal/installation.
Depth:
Comprehensive from basic DIY maintenance to advanced diagnostics and component-level repairs.
Diagnostic Capabilities:
Includes procedures for interpreting diagnostic trouble codes (DTCs) and performing system tests.
Torque Specifications:
Detailed torque values for all critical fasteners across all vehicle systems.
Wiring Diagrams:
Extensive and detailed electrical wiring diagrams for all major systems.
Special Tools:
Identification and usage of specialized tools required for specific repair procedures.
Oil Change Interval:
Every 7,500 - 15,000 miles or annually, depending on driving conditions and oil type (refer to Condition Based Service - CBS system or manual recommendations).
Transmission Fluid Change:
Manual: Inspect periodically, change fluid based on mileage/usage (e.g., 60,000-100,000 miles). Automatic: Typically recommended around 60,000-100,000 miles or sooner under severe use.
Coolant Flush:
Every 2-4 years or 30,000-60,000 miles.
Brake Fluid Flush:
Every 2 years regardless of mileage.
Engine Oil:
SAE 0W-30 or 5W-30, BMW LL-01 approved synthetic oil (e.g., Castrol Edge Professional OE 0W-30).
Coolant:
BMW Blue Antifreeze/Coolant (G48 ethylene glycol based) mixed 50/50 with distilled water.
Transmission Fluid Manual:
SAE 75W-90 synthetic gear oil, meeting BMW specifications (e.g., Castrol Syntrans FE 75W-90).
Transmission Fluid Automatic:
ATF LT 71141 (Dexron III may be used as a substitute in some cases, but LT 71141 is preferred, e.g., Pentosin ATF 1).
Brake Fluid:
DOT 4 low-viscosity brake fluid (BMW recommends DOT 4 HP).
Power Steering Fluid:
Pentosin CHF 11S or CHF 202 (Green colored fluid).
Cooling System Failures:
Cracked plastic expansion tanks, failing water pumps (plastic impellers), thermostat housing leaks, burst coolant hoses.
Oil Leaks:
Valve cover gasket leaks, oil pan gasket leaks, oil filter housing gasket leaks (common on M54 engines).
Suspension Wear:
Control arm bushings (FCABs), sway bar links/bushings, ball joints, tie rod ends, rear shock mounts.
Ccv System:
Crankcase Ventilation (CCV) system failure leading to oil consumption and vacuum leaks.
ABS Wheel Speed Sensors:
Failure of ABS wheel speed sensors can cause ABS and traction control warnings.
Interior Electronics:
Pixelation on the instrument cluster display, HVAC control unit issues, central locking problems.
Pre Catalytic Converters:
Cracking or failure of pre-catalytic converters (especially on early M54 engines) leading to exhaust leaks and rough running.
