Market Segment:
Full-size Luxury Sedan, representing the pinnacle of BMW's engineering and comfort in its class during the early 1990s.
Key Competitors:
Mercedes-Benz S-Class (W140), Lexus LS 400, Jaguar XJ.
Vehicle Key Features:
V12 engine, long wheelbase (iL designation), advanced luxury features for its time, refined ride quality, strong performance.
Manual Utility:
Essential resource for maintaining the complex systems of the 750iL, enabling accurate diagnostics and repairs, crucial for preserving value and performance.
Engine Systems:
Engine mechanical, lubrication system, cooling system, fuel system (including fuel injection - Bosch Motronic), ignition system, exhaust system, engine management.
Transmission Systems:
Automatic transmission (e.g., 4HP22 EH) repair, diagnostics, fluid specifications, and control systems.
Drivetrain Systems:
Driveshafts, differential, rear axle, wheel bearings.
Suspension Systems:
Front and rear suspension components, shock absorbers, springs, control arms, bushings, self-leveling rear suspension (if applicable).
Braking Systems:
Brake system hydraulics, ABS (Anti-lock Braking System), brake pads, rotors, calipers, parking brake, bleeding procedures.
Steering Systems:
Power steering system, steering rack, steering column, alignment specifications.
Electrical Systems:
Complete electrical system diagnostics, wiring diagrams, battery, alternator, starter motor, lighting, horn, power accessories, fuses, relays.
HVAC Systems:
Heating, Ventilation, and Air Conditioning (HVAC) system service, refrigerant handling, diagnostics.
Body And Interior:
Body panels, doors, windows, locks, mirrors, interior trim, seats, dashboard, sunroof operation.
Diagnostic Systems:
On-board diagnostics (OBD) principles for the era, troubleshooting flowcharts, fault code identification.
Maintenance Procedures:
Scheduled maintenance tasks, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspections and replacement.
Repair Procedures:
Detailed step-by-step instructions for component removal, overhaul, repair, and reinstallation for all major systems.
Troubleshooting Guides:
Systematic approaches to diagnosing common and uncommon faults, including symptom-based troubleshooting.
Specifications And Tolerances:
Precise measurements, clearances, torque values, and operating parameters for engine, suspension, brakes, etc.
Wiring Diagrams:
Comprehensive and detailed electrical wiring schematics for all vehicle circuits.
Depth Of Coverage:
Extensive, covering basic maintenance to complex engine and transmission overhauls, suitable for professional mechanics and experienced DIY enthusiasts.
Displacement:
4.988 L (304.4 cu in)
Bore X Stroke:
84.0 mm x 90.0 mm
Valvetrain:
SOHC, 2 valves per cylinder (total 24 valves)
Horsepower:
300 hp (221 kW) @ 5200 rpm
Torque:
332 lb-ft (450 Nm) @ 3900 rpm
Fuel Injection System:
Bosch Motronic M-1.2 Electronic Fuel Injection (EFL) with two ECUs.
Fuel Type:
Premium Unleaded Gasoline (91+ Octane)
Engine Control Units:
Dual Engine Control Units (ECUs), one for each cylinder bank.
Infotainment System:
Early generation iDrive predecessor. Features may include a premium audio system (e.g., Nakamichi), cassette player, multi-function display, and potentially a rudimentary navigation system (depending on options).
Driver Assistance Features:
ABS, cruise control, power-adjustable steering column with memory, automatic climate control. ASC (Automatic Stability Control) was an option.
Connectivity Features:
Limited by era; typically featured onboard computer diagnostics, cellular phone preparation (optional).
Oil Change Interval:
Typically every 7,500 - 10,000 miles (12,000 - 16,000 km) or 12 months, depending on driving conditions.
Spark Plug Replacement:
Approximately every 50,000 - 60,000 miles (80,000 - 100,000 km).
Transmission Fluid Service:
Recommended every 50,000 - 70,000 miles (80,000 - 110,000 km), though some sources suggest earlier intervals for optimal longevity.
Engine Oil Type:
Synthetic 5W-30 or 5W-40 (refer to owner's manual for specific viscosity and API/ACEA ratings).
Engine Oil Capacity:
Approx. 7.5 Liters (7.9 US Quarts) with filter change.
Coolant Type:
BMW Blue Antifreeze/Coolant (Glysantin G05 or equivalent).
Coolant Capacity:
Approx. 12.0 Liters (12.7 US Quarts).
Common Issues:
V12 engine requires meticulous maintenance; potential issues with ignition coils, fuel injectors, starter motors, and the complex ECU systems. Vanos system on some models can be prone to wear. Electrical gremlins are not uncommon in older vehicles of this complexity. Age-related wear on suspension bushings and rubber components.
Key Preventative Tasks:
Regular fluid checks and changes, inspection of cooling hoses, timely replacement of wear items, thorough electrical system checks.
Brand Focus:
BMW is renowned for its 'Ultimate Driving Machine' philosophy, blending performance, luxury, and engineering innovation.
E32 Introduction:
The E32 generation of the 7 Series was introduced in 1986, succeeding the E23. The 750iL variant, featuring the groundbreaking V12 engine, debuted in 1987.
E32 Facelift:
The E32 received a significant facelift for the 1992 model year, including subtle exterior styling updates, improved interior ergonomics, and updated electronics.
Production Years E32:
1986-1994
V12 Significance:
The M70 V12 engine was BMW's first production V12, showcasing their engineering prowess and ambition in the luxury segment.
