🏷️ Basic Information

Make:

BMW

Model:

750iL

Year:

1989

Chassis Code:

E32

Engine Code:

M70 B50

👋 Introduction

Segment:

Ultra-luxury sedan, flagship model for BMW in its era.

Target Audience:

Affluent individuals seeking superior comfort, performance, and advanced technology.

Key Competitors:

Mercedes-Benz S-Class (W126/W140), Jaguar XJ, Cadillac DeVille, Lexus LS 400 (introduced shortly after).

Powertrain:

The signature M70 5.0-liter V12 engine, offering smooth, powerful performance.

Luxury Appointments:

Exceptional interior comfort, advanced climate control, premium materials, and spacious rear seating (especially in the 'L' long-wheelbase variant).

Technology Innovation:

One of the first BMWs to feature advanced electronics for its time, including early iterations of ABS and complex engine management.

Manual Utility:

Essential for owners and independent repair shops to maintain the complex V12 powertrain and luxury features of this iconic sedan.

📋 Manual Details

Manual Type:

Factory Service Repair Manual

Language:

English

Format:

Download PDF

Page Count Estimate:

Hundreds of pages (specific count not provided in product info, typical for full factory manuals)

📖 Manual Coverage

Engine System:

Detailed diagnosis, repair procedures, component specifications, and torque values for the M70 5.0L V12 engine.

Transmission System:

Coverage for automatic transmission (e.g., 4HP24) including diagnosis, fluid changes, and common repair procedures.

Fuel System:

In-depth information on fuel injection system (Bosch Motronic), fuel pump, injectors, fuel pressure regulator, and diagnostic procedures.

Electrical System:

Comprehensive wiring diagrams, component location, troubleshooting guides for all electrical systems, including lighting, starting, charging, and accessories.

Suspension Steering:

Detailed information on front and rear suspension systems, power steering system, and related components.

Brakes System:

Diagnosis and repair of the hydraulic brake system, including ABS (Anti-lock Braking System), brake fluid specifications, and component replacement.

Body Exterior:

Procedures for body panel repair, glass replacement, door mechanisms, and exterior trim.

Body Interior:

Information on interior trim, seating adjustments, climate control system, and dashboard components.

Climate Control System:

Diagnosis and repair of the automatic climate control system, refrigerant, and component servicing.

Cooling System:

Details on radiator, coolant, water pump, thermostat, and cooling fan system maintenance and repair.

Exhaust System:

Information on exhaust manifold, catalytic converter, mufflers, and related components.

Diagnostic Troubleshooting:

Extensive troubleshooting charts and diagnostic procedures for common and complex issues.

Routine Maintenance:

Oil changes, filter replacements, spark plug replacement, fluid level checks, and general inspection procedures.

Component Replacement:

Step-by-step instructions for replacing major and minor components across all systems.

Engine Rebuild:

Comprehensive procedures for engine disassembly, inspection, repair, and reassembly for the M70 V12.

Transmission Overhaul:

Detailed instructions for transmission disassembly, repair, and reassembly.

Brake System Service:

Pad and rotor replacement, caliper servicing, brake line bleeding, and ABS component diagnosis.

Electrical Diagnosis:

Troubleshooting electrical faults using wiring diagrams and diagnostic test procedures.

Suspension Alignment:

Specifications and procedures for suspension alignment.

Air Conditioning Service:

Refrigerant handling, leak detection, and component replacement for the A/C system.

Body Repair:

Procedures for dent removal, panel alignment, and rust repair.

Diagnostic Capabilities:

Advanced diagnostic procedures, fault code interpretation (where applicable to the era), and live data analysis guidance.

Repair Complexity:

Covers everything from basic maintenance tasks to complete engine and transmission rebuilds, requiring specialized tools and knowledge.

Specification Detail:

Includes precise torque specifications, measurement tolerances, and fluid capacities essential for accurate repairs.

📊 Manual Specifications

Digital Format:

PDF

Scalability:

High-resolution PDF allows for clear printing of individual pages or the entire manual.

Digital Format:

N/A (digital download)

Digital Format:

N/A (digital download)

⚙️ Engine Specifications

Engine Type:

Naturally Aspirated V12

Displacement:

4988 cc (5.0 Liters)

Bore X Stroke:

84.0 mm x 75.0 mm

Compression Ratio:

8.8:1

Horsepower:

300 hp @ 5200 rpm (DIN)

Torque:

460 Nm (339 lb-ft) @ 3900 rpm (DIN)

Fuel Delivery:

Sequential Multi-Point Fuel Injection (Bosch Motronic M3.3)

Fuel Type:

Premium Unleaded Gasoline (91+ Octane)

Engine Control Unit:

Dual Bosch Motronic ECUs (one for each bank of cylinders).

Emission Controls:

Catalytic converters, EGR system (depending on market).

Oil Capacity With Filter:

Approximately 7.5 Liters (7.9 US Quarts). Specific BMW oil part number likely in manual.

Recommended Oil Viscosity:

Likely 5W-30 or 10W-40, refer to manual for precise BMW Longlife specification if applicable.

🔧 Transmission

Type:

4-Speed Automatic Transmission (ZF 4HP24)

Type:

Manual transmission was not offered on the 750iL.

Gear Ratios:

Refer to manual for specific gear ratios (e.g., 1st: 3.18, 2nd: 1.78, 3rd: 1.00, 4th: 0.71).

Transmission Fluid Capacity:

Approximately 10-12 Liters (depends on torque converter drain). Specific BMW fluid part number likely in manual.

Fluid Type:

Likely Dexron III or equivalent; consult manual for exact BMW specification.

📐 Dimensions

Length:

Approx. 5024 mm (197.8 in)

Width:

Approx. 1844 mm (72.6 in)

Height:

Approx. 1400 mm (55.1 in)

Wheelbase:

Approx. 2997 mm (118.0 in)

Curb Weight:

Approx. 1840 kg (4057 lbs)

Gross Vehicle Weight Rating:

Refer to manual for GVWR

Wheel Bolt Pattern:

5x120 mm

Standard Wheel Size:

Likely 15 or 16 inches

Standard Tire Size:

Likely 225/60VR15 or 225/55VR16

🛡️ Safety Features

Safety Standards:

Designed to meet contemporary safety standards of the late 1980s; specific NHTSA/Euro NCAP ratings for this era are not directly comparable to modern standards.

ABS:

Standard Bosch ABS III system.

Traction Control:

Not typically equipped with ASC+T on the 1989 model, but some later E32s might have.

Airbags:

Driver's side airbag was optional or standard depending on market and specific build date.

Seatbelts:

3-point front and rear seatbelts, pre-tensioners likely standard on front belts.

Body Structure:

Reinforced passenger cell, crumple zones.

💡 Technology Features

Audio System:

High-fidelity stereo system, often with cassette player and radio. Upgrade options available.

Navigation:

Optional early navigation system (BMW Professional Navigation System), very basic by modern standards.

ABS:

Standard Anti-lock Braking System (ABS) for enhanced braking control.

Cruise Control:

Standard electronic cruise control system.

Connectivity Features:

Limited by modern standards; primarily focused on internal vehicle systems. On-board computer often included basic trip data.

Climate Control:

Dual-zone automatic climate control with digital display and air quality sensor.

Seat Features:

Power-adjustable front seats with memory function, heated seats optional or standard, rear seating comfort features.

🔧 Maintenance

Oil Change Interval:

Typically 10,000-15,000 miles or annually; consult manual for specific BMW recommendation based on driving conditions.

Spark Plug Replacement:

Long-life spark plugs, often around 60,000 miles, but refer to manual for exact specification and torque values for the M70.

Transmission Fluid Change:

Recommended every 30,000-60,000 miles or as per manual, especially for high-mileage vehicles.

Coolant Flush:

Typically every 2-3 years or 30,000-50,000 miles.

Engine Oil Specification:

Refer to manual for specific BMW LL-xx specification or SAE viscosity grade required for M70.

Brake Fluid Specification:

DOT 4 recommended.

Power Steering Fluid Spec:

Refer to manual, often BMW's own hydraulic fluid or Pentosin CHF 11 S for later models.

Engine Management Complexity:

The dual Motronic system can be complex to diagnose; issues with airflow sensors, ignition coils, and wiring harnesses are common.

Cooling System Leaks:

Aging plastic components, hoses, and radiator can lead to coolant leaks.

Electrical Gremlins:

As with many complex vehicles of this era, aging wiring, connectors, and electronic control units can lead to intermittent electrical faults.

V12 Specific:

The M70 V12 requires meticulous maintenance. Spark plug access, while improved over some other V12s, can still be labor-intensive. Ignition coil failures are not uncommon.

📚 Vehicle History

Bmw Philosophy:

BMW's long-standing reputation for engineering excellence, performance ('The Ultimate Driving Machine'), and luxury.

E32 Generation:

The E32 chassis represented BMW's third generation of its flagship 7 Series, succeeding the E23 and debuting innovative technology and design for its time.

Introduction Of V12:

The 1987 introduction of the 750i (and the long-wheelbase 750iL) marked BMW's return to V12 engine production after many years, positioning the 7 Series at the pinnacle of automotive luxury and performance.

Production Years:

The E32 chassis was produced from 1986 to 1994. The 750iL variant was produced within this range, with the 1989 model year being part of the initial production phase.

🏆 Awards & Recognition

Automotive Press:

The E32 7 Series, including the 750iL, was generally praised by automotive journalists for its engineering, performance, and luxury, though often noted for its high price and complexity.

Industry Impact:

Solidified BMW's position in the high-luxury segment and showcased their V12 engineering prowess.