Engine Mechanical S54:
Full engine teardown, rebuild, component specifications, timing, VANOS system.
Engine Management:
DME (Digital Motor Electronics) functions, sensor diagnostics, actuators, emission controls, EWS (Immobilizer).
Cooling System:
Radiator, water pump, thermostat, coolant lines, fan operation.
Lubrication System:
Oil pump, oil filter housing, oil pan, oil pressure specifications.
Fuel System:
Fuel pump, fuel injectors, fuel pressure regulator, fuel lines, charcoal canister.
Exhaust System:
Exhaust manifold, catalytic converters, mufflers, oxygen sensors.
Transmission Manual Getrag 420G:
Clutch, gearbox internal components, shift mechanism, lubrication.
Transmission Smg Ii:
Hydraulic system, pump, actuators, shift logic, programming, clutch control.
Drivetrain:
Driveshaft, CV joints, limited-slip differential (M Variable Lock Differential), axle shafts.
Front Suspension:
MacPherson struts, control arms, ball joints, sway bar, bushings.
Rear Suspension:
Multi-link independent rear suspension, trailing arms, control arms, shock absorbers, springs, bushings.
Steering System:
Power steering rack, hydraulic pump, tie rods, steering column.
Brake System Front:
Vented discs, M-specific calipers (e.g., Brembo), brake pad replacement, rotor specifications.
Brake System Rear:
Vented discs, M-specific calipers, parking brake mechanism.
ABS Dsc System:
ABS control unit, wheel speed sensors, DSC (Dynamic Stability Control) module, hydraulic modulator.
Wheels Tires:
Bolt patterns, recommended tire sizes, wheel torque specifications.
Electrical Power Supply:
Battery, alternator, starter motor, wiring harness repair.
Lighting System:
Headlights (Xenon/Halogen), taillights, interior lighting, bulb replacement.
Instrument Cluster:
Gauge operation, warning lights, odometer.
Audio Navigation System:
Head unit, speakers, amplifier, antenna, navigation unit troubleshooting.
HVAC System:
Compressor, condenser, evaporator, blower motor, refrigerant recharge, climate control module.
Body Structure:
Frame straightening, panel replacement, collision repair guidelines.
Doors Windows Locks:
Door panel removal, window regulator repair, central locking system.
Seats Restraints:
Seat adjustment mechanisms, airbag system components, seatbelt service.
Convertible Top Mechanism:
Hydraulic system, motors, switchgear, fabric care (for convertible models).
Routine Maintenance:
Oil changes, filter replacements, spark plug replacement, brake fluid flush, coolant flush.
Major Repairs:
Engine head gasket replacement, piston ring replacement, bearing replacement, transmission overhaul, differential rebuild.
Diagnostics:
Troubleshooting guides for common and uncommon faults, diagnostic trouble codes (DTCs), electrical testing.
Adjustments:
Valve lash adjustment, throttle body synchronization, shift linkage adjustment.
Disassembly Reassembly:
Step-by-step instructions for removing and refitting all major components and sub-assemblies.
Installation:
Procedures for installing replacement parts and accessories.
Calibration:
Calibration procedures for electronic systems (e.g., steering angle sensor, SMG control unit).
Scheduled Maintenance:
Detailed maintenance schedules based on mileage or time intervals.
Depth:
Comprehensive, covering everything from basic preventative maintenance to complete engine and transmission rebuilds, including advanced electronic diagnostics.
Oil Change Interval:
Variable Service Interval Indicator (VSI) typically around 10,000-15,000 miles, but often recommended every 7,500 miles or annually by enthusiasts.
Inspection I:
At approximately 30,000 miles (e.g., oil change, filter replacement, brake inspection, visual checks).
Inspection Ii:
At approximately 60,000 miles (includes Inspection I items plus spark plug replacement, valve adjustment, differential fluid change, transmission fluid change).
Brake Fluid Flush:
Every 2 years
Coolant Flush:
Every 2-4 years
Engine Oil:
SAE 0W-40 Synthetic (BMW Longlife-01 approved, e.g., Castrol TWS Motorsport 10W-60 is often preferred by enthusiasts for high-revving use).
Engine Oil Capacity:
6.5 Liters (with filter change)
Coolant:
BMW Blue Antifreeze/Coolant (G48 type), 50/50 mix with distilled water.
Transmission Fluid Manual:
BMW MTF LT-2 or equivalent (e.g., Pentosin MTF 2).
Transmission Fluid Smg:
Pentosin CHF 11S (Hydraulic fluid for SMG system).
Differential Fluid:
SAE 75W-140 Synthetic Gear Oil (BMW Hypoid Gear Oil G3 or equivalent, often with friction modifier for LSD).
Brake Fluid:
DOT 4 (BMW approved, e.g., Castrol DOT 4 or Ate Typ 200).
Rod Bearings:
A well-known potential failure point, especially on early models or those not consistently maintained with proper oil. The manual provides specs for inspection and replacement.
Subframe Mounts:
Cracking or separation of the rear subframe mounting points due to chassis stress. The manual details inspection points and repair procedures.
Vanos System:
Potential failure of VANOS solenoids or seals, leading to rough idle, power loss, or rattling noises. The manual details diagnostic and repair steps.
Throttle Actuators:
Failure of the individual throttle body actuators can cause idle issues and driveability problems.
Cooling System Hoses:
Aging rubber hoses can lead to leaks or bursts. Manual covers inspection and replacement.