Engine Mechanical:
Complete disassembly, assembly, inspection, and repair of all engine components including cylinder head, block, crankshaft, pistons, connecting rods, camshafts, valve train.
Engine Management:
Diagnosis and repair of DME (Digital Motor Electronics), sensors (crankshaft, camshaft, MAF, O2), actuators (injectors, ignition coils), fuel injection, ignition timing, emissions control systems.
Transmission Manual:
Repair and overhaul of Getrag 5-speed manual transmissions (S5D 310Z, S5D 320Z), clutch system, shifter mechanism, driveshaft, differential.
Transmission Automatic:
Diagnosis and repair of ZF 4HP24, 4HP22 EH automatic transmissions, electronic control modules (TCU), torque converter, valve body, solenoids, fluid and filter replacement.
Suspension And Steering:
Front and rear suspension components (struts, shock absorbers, control arms, ball joints, bushings), power steering system, steering rack, steering column, wheel alignment.
Brakes:
Front and rear disc brake systems, ABS (Anti-lock Braking System) diagnosis and repair, brake lines, calipers, master cylinder, parking brake.
Electrical System:
Wiring diagrams, battery, alternator, starter motor, lighting system, power windows, power seats, central locking, horn, fuse boxes, relays, EWS (Electronic Immobilizer System).
Body And Chassis:
Body panel removal and installation, door mechanisms, hood and trunk operation, glass replacement, interior trim, corrosion prevention.
HVAC:
Heating, ventilation, and air conditioning (HVAC) system diagnosis and repair, refrigerant system, compressor, evaporator, condenser, blower motor, climate control unit.
Scheduled Maintenance:
Detailed procedures for oil changes, filter replacements, spark plug changes, coolant flushes, brake fluid changes, transmission fluid changes, differential fluid changes, air filter replacement.
Troubleshooting Guides:
Diagnostic procedures for common and uncommon issues, fault code interpretation, symptom-based troubleshooting.
Repair Procedures:
Step-by-step instructions for component removal, installation, and adjustment for all major vehicle systems.
Rebuilding Instructions:
Comprehensive instructions for rebuilding engines, transmissions, and other major mechanical components.
Wiring Diagrams:
Full set of detailed electrical wiring diagrams for all vehicle systems, color-coded and component-identified.
Diagnostic Capabilities:
Advanced diagnostics, including sensor data interpretation, actuator testing, and DME programming/coding procedures where applicable.
Specifications And Tolerances:
Detailed torque specifications, critical clearances, wear limits, and measurement procedures for all mechanical components.
Special Tools:
Identification and usage of BMW-specific special tools required for various repair and maintenance procedures.
Head Unit:
BMW Professional RDS cassette player/radio with optional CD changer.
Display:
Digital odometer, trip computer, and climate control display.
Cruise Control:
Electronic cruise control
Parking Assistance:
Rear parking sensors optional on later models.
Cellular Integration:
Optional early car phone integration.
Power Features:
Power adjustable steering column, power seats with memory, power mirrors, power windows, power-operated pop-up headlights.
Oil Change Interval:
Every 10,000-15,000 miles or annually, depending on driving conditions. Refer to manual for specific recommendations.
Spark Plug Replacement:
Every 50,000-100,000 miles (depending on spark plug type). V12 engines have 12 spark plugs.
Coolant Flush:
Every 2-4 years or 30,000-60,000 miles.
Engine Oil 840Ci:
SAE 5W-30 or 5W-40, API SH/SJ or BMW Longlife-98 specification.
Engine Oil 850I:
SAE 10W-40 or 10W-30, API SH/SJ or BMW Longlife-98 specification.
Transmission Fluid Auto:
ZF Lifeguardfluid 6 or equivalent (e.g., Dexron III for older 4HP-22 EH models). Consult manual for exact specification.
Transmission Fluid Manual:
GL-4 or GL-5 gear oil, SAE 75W-90.
Coolant:
BMW Blue Antifreeze/Coolant (G48 ethylene glycol based) or equivalent.
Cooling System:
Expansion tank leaks, hose degradation, water pump failures, clogged radiators.
Electrical Issues:
ABS/ASC sensor failures, headlight motor failures, wiring harness degradation, EWS system issues.
Door Panels:
Door vapor barrier seal degradation leading to water ingress.
Suspension:
Front control arm bushings and ball joint wear, rear trailing arm bushings.
Engine M60:
Nikasil cylinder bore wear (early models), oil leaks from valve cover gaskets and oil pan.
Engine M70:
Spark plug tube seals, ignition system issues (12 spark plugs and coils), oil leaks.
