Engine:
All engine variants (M30, M60, M70/M73 V12), including diagnosis, overhaul, and component-level repair.
Transmission:
Automatic Transmission (e.g., ZF 4HP22, 4HP24, 5HP30) and Manual Transmission (less common in E32, but covered if equipped), including fluid changes, rebuilds, and electronic control diagnostics.
Drivetrain:
Rear-wheel drive system, driveshafts, differential, axles, and wheel bearings.
Suspension:
Front and rear suspension, including McPherson struts, multi-link rear, springs, shock absorbers, bushings, and hydraulic self-leveling suspension (EH) for rear axle.
Steering:
Power steering system, steering column, steering rack/box, and Servotronic steering system (speed-sensitive power steering).
Brakes:
Front and rear disc brakes (vented/solid), ABS (Anti-lock Braking System), EBD (Electronic Brake-force Distribution), brake fluid, calipers, master cylinder, and hydraulic lines.
Electrical System:
Comprehensive coverage of low voltage system, battery, charging system (alternator), starter motor, ignition system, lighting (headlights, taillights, interior), power windows, mirrors, seats, sunroof, central locking, and fuse/relay box diagrams.
Engine Management:
Digital Motor Electronics (DME) for M30/M60/M70, including sensor diagnostics, fuel injection, idle control, emissions control systems (e.g., catalytic converter, secondary air injection), and troubleshooting.
Climate Control:
Automatic climate control system (HVAC), A/C compressor, blower motor, evaporator, heater core, refrigerant, control modules, and cabin air filter replacement.
Body And Interior:
Body panel removal/installation, door mechanisms, trunk, hood, interior trim, seating systems, airbags (if equipped), and sound insulation.
Diagnostic Systems:
On-board diagnostics (OBD) principles relevant to the era, troubleshooting codes, and diagnostic connector locations.
Maintenance:
Scheduled maintenance procedures, oil changes, filter replacements (oil, fuel, air), spark plug replacement, coolant flushes, brake fluid changes, and transmission fluid services.
Troubleshooting:
Systematic fault finding for all major systems, including diagnostic flowcharts, common issues, and symptom-based troubleshooting.
Repair:
Detailed step-by-step instructions for component removal, installation, and repair for all major automotive systems.
Overhaul:
Complete engine rebuild procedures, transmission overhaul, differential rebuild, and major component overhaul instructions.
Specifications:
Torque specifications for all fasteners, engine clearances, valve adjustments, and assembly tolerances.
Wiring Diagrams:
Comprehensive electrical wiring diagrams for all vehicle systems, including color coding and component identification.
Depth:
Factory-level detail, covering everything from basic fluid checks to complete engine and transmission rebuilds, advanced electronic diagnostics, and bodywork repairs.
Audience:
BMW Dealership Technicians, professional mechanics, and advanced DIY enthusiasts.
Engine Variants Covered:
M30 (3.0L Inline-6), M60 (3.0L/3.5L V8), M70/M73 (5.0L/5.4L V12).
335I Engine Specs:
3.5L M30B35 Inline-6, approx. 208 hp @ 5700 rpm, 224 lb-ft @ 4000 rpm.
740I Engine Specs:
4.0L M60B40 V8, approx. 282 hp @ 5800 rpm, 295 lb-ft @ 4500 rpm.
750I Engine Specs:
5.0L M70B50 V12, approx. 296 hp @ 5200 rpm, 332 lb-ft @ 3900 rpm.
Fuel Delivery:
Bosch Motronic fuel injection (M3.1, M3.3, M3.7, M7.1 depending on engine/year).
Fuel Type:
Unleaded gasoline (premium octane recommended).
Dme Versions:
Detailed information on various Bosch DME control units and their specific functions.
Standard Transmission Type:
4-speed automatic (ZF 4HP22, 4HP24).
Optional Transmission Type:
5-speed manual (limited availability on early models), 4-speed automatic (4HP24 on later models), 5-speed automatic (5HP30 on later models).
Transmission Features:
Electronic control (EGS) for later models, Comfort/Sport mode selection, torque converter lock-up clutch.
Automatic Transmission Fluid:
Dexron III (or equivalent specified by BMW, e.g., LT2)
Automatic Transmission Fluid Capacity:
Approx. 8-10 liters (depending on model and torque converter fill).
Infotainment Features:
Premium sound systems (e.g., Hi-Fi, Professional), cassette player, optional CD changer (trunk mounted), analog climate control displays.
Driver Assistance Systems:
ABS, Cruise Control, Optional Traction Control System (ASR), Servotronic Power Steering.
Connectivity Features:
Very limited by modern standards. Primarily wired systems for telephone integration (optional).
Comfort And Convenience:
Power adjustable front and rear seats (with memory), heated seats, dual-zone automatic climate control, power windows, power mirrors, central locking, keyless entry (optional), self-leveling rear suspension (optional).
Oil Change Interval:
Typically every 10,000 - 15,000 miles or 12-24 months, depending on driving conditions and oil type used. Manual provides detailed service schedule.
Spark Plug Replacement:
Approx. 30,000 - 60,000 miles (depending on spark plug type - copper vs. long-life).
Coolant Flush Interval:
Every 2-3 years or as per manual recommendations.
Engine Oil Type:
SAE 5W-30, 5W-40, or 10W-40 synthetic or semi-synthetic (BMW Longlife-98 or API SJ/SL).
Coolant Type:
BMW Blue Antifreeze/Coolant (G48 ethylene glycol-based) or equivalent, mixed 50/50 with distilled water.
Common Maintenance Concerns:
Coolant leaks (especially from plastic components), oil leaks (valve cover gaskets, oil pan gaskets), ABS sensor failures, vacuum hose degradation, automatic transmission hydraulic issues, EML (Electronic Throttle Control) problems on later models, front suspension bushings wear.
Typical Wear Items:
Control arm bushings, ball joints, shock absorbers, exhaust components, fuel pumps, various sensors.