Model Years Covered:
1988, 1989, 1990, 1991, 1992, 1993, 1994
Variant Covered:
735i, 735iL, 740i, 740iL, 750iL
Market Position:
The E32 7 Series represented BMW's flagship luxury sedan, competing with high-end offerings from Mercedes-Benz, Audi, and Lexus, emphasizing advanced technology, performance, and refinement.
Competitors:
Mercedes-Benz S-Class (W126/W140), Audi V8, Lexus LS 400.
Key Features:
Renowned for its sophisticated engineering, powerful inline-six and V12 engines, comfortable ride, and luxurious interior appointments. Introduction of advanced electronic systems for its era.
Value Proposition:
An invaluable resource for owners and technicians seeking to maintain, diagnose, and repair the complex systems of the E32 7 Series, offering significant cost savings over dealership servicing.
Engine:
Detailed coverage including disassembly, inspection, repair, and reassembly of all engine components.
Transmission:
Complete service and repair procedures for automatic transmissions, including fluid changes, seal replacement, and component overhaul.
Suspension Steering Brakes:
In-depth information on suspension systems (front and rear), steering mechanisms, and brake systems (hydraulic, ABS if applicable).
Body Equipment:
Covers interior and exterior body components, trim, doors, windows, locks, and associated mechanisms.
Electrical System:
Extensive coverage of the entire electrical system, including wiring, components, diagnosis, and troubleshooting.
Equipment And Accessories:
Details on comfort, convenience, and optional equipment such as climate control, power seats, and other electronic accessories.
Electrical Wiring Diagrams:
Dedicated section with detailed and comprehensive electrical wiring diagrams for accurate troubleshooting.
Maintenance:
Scheduled maintenance, fluid checks and changes, filter replacements, and general upkeep.
Troubleshooting:
Systematic diagnostic procedures and symptom-based troubleshooting guides.
Repair:
Step-by-step repair instructions for all major vehicle systems, from minor adjustments to major component overhauls.
Disassembly Reassembly:
Detailed instructions for the complete disassembly and reassembly of major vehicle components.
Depth:
Factory-level detail suitable for both DIY enthusiasts and professional mechanics, covering advanced diagnostics and complex repairs.
File Format Compatibility:
PDF format compatible with all PC-based Windows operating systems and Mac.
Printability:
All pages are printable, ensuring practical use in a workshop environment.
Binding Type:
N/A (Digital format)
Paper Type:
N/A (Digital format)
Software Requirements:
Adobe PDF Reader & WinZip
Primary Engine 735I 735Il
Engine Type:
3.5L Inline 6-cylinder SOHC
Bore X Stroke:
92 mm x 86 mm
Compression Ratio:
8.0:1 or 8.5:1 (depending on market and year)
Horsepower:
Approx. 208-211 hp @ 5700-6000 rpm
Torque:
Approx. 225-232 lb-ft @ 4000-4200 rpm
Fuel System:
Bosch Motronic fuel injection
Primary Engine 740I 740Il
Engine Type:
4.0L V8 SOHC (later models may have DOHC variants, but E32 primarily used SOHC)
Bore X Stroke:
84 mm x 89 mm
Compression Ratio:
10.0:1
Horsepower:
Approx. 282 hp @ 5800 rpm
Torque:
Approx. 295 lb-ft @ 4500 rpm
Fuel System:
Bosch Motronic fuel injection
Engine Type:
5.0L V12 SOHC
Bore X Stroke:
84 mm x 91 mm
Horsepower:
Approx. 296 hp @ 5200 rpm
Torque:
Approx. 332 lb-ft @ 3900 rpm
Fuel System:
Dual Bosch Motronic fuel injection (one per bank)
Transmission Type:
Primarily automatic transmissions. Manual transmissions were extremely rare or not offered in North America for the E32 generation.
Automatic Transmission 735I 735Il
Automatic Transmission Model:
ZF 4HP-22 EH (Electronic Control)
Automatic Transmission 740I 740Il
Automatic Transmission Model:
ZF 4HP-24 EH (Electronic Control)
Automatic Transmission 750Il
Automatic Transmission Model:
ZF 4HP-22 EH (often paired with the M70 V12)
Transmission Features:
Electronic control (EH) for smoother shifts and adaptive shifting logic. Different gear ratios tailored for engine output and vehicle weight.
Transmission Fluid Type:
Typically Dexron II or equivalent (refer to manual for exact specification and capacity).
Exterior Dimensions 735I 740I
Wheelbase:
Approx. 116.4 inches (2957 mm)
Length:
Approx. 196.9 inches (5000 mm)
Width:
Approx. 72.2 inches (1834 mm)
Height:
Approx. 56.1 inches (1425 mm)
Exterior Dimensions 735Il 740Il 750Il
Wheelbase:
Approx. 120.5 inches (3061 mm)
Length:
Approx. 201.1 inches (5108 mm)
Width:
Approx. 72.2 inches (1834 mm)
Height:
Approx. 56.1 inches (1425 mm)
Curb Weight Range:
Approximately 3800 - 4500 lbs (1725 - 2040 kg), varying significantly by model and equipment.
Wheel Bolt Pattern:
5x120 mm
Typical Wheel Size:
15-inch or 16-inch alloy wheels (optional larger sizes available).
Typical Tire Size:
e.g., 225/60R15, 225/55R15, 225/55R16 (refer to manual for specific fitments).
Safety Ratings:
As a luxury vehicle of its era, it incorporated advanced safety features but did not undergo modern crash test rating systems like NHTSA or IIHS. Focus was on structural integrity and passive restraint systems.
Active Safety Features:
Anti-lock Braking System (ABS) standard on most models, Traction Control System (ASC/ASC+T) available on later models or as an option.
Passive Safety Features:
Dual front airbags (standard from late 1990s), crumple zones, reinforced passenger cell, side-impact protection beams.
Infotainment System:
Early E32 models featured premium audio systems with cassette players. Later models offered optional CD changers and navigation systems (though rudimentary by modern standards).
Driver Assistance Features:
Cruise control, power-adjustable seats with memory, heated seats, and automatic climate control were common. Parking sensors were not available in this generation.
Connectivity Features:
Onboard computer for trip data and system status. Tele Aid or similar cellular phone integration was not standard, though provisions might exist for aftermarket installation.
Lighting Features:
Halogen headlights, fog lights, automatic headlight leveling system (prone to failure), and interior courtesy lighting.
Service Intervals Engine Oil
Engine Oil Change Interval:
Typically every 7,500 to 10,000 miles (12,000-16,000 km) or annually, depending on driving conditions. Refer to manual for specific recommendations.
Service Intervals Transmission Fluid
Transmission Fluid Change Interval:
Often recommended at 30,000-50,000 miles (48,000-80,000 km) or every 2-3 years. For 'lifetime' fluids, regular inspection is crucial.
Service Intervals Coolant
Coolant Change Interval:
Typically every 2 years or 30,000 miles (48,000 km) with conventional coolant, or longer with modern extended-life coolants (BMW coolant specification is critical).
Fluid Specifications Engine Oil
Engine Oil Specification:
Viscosity grades like 5W-30, 5W-40, 10W-40 are common, depending on climate and oil technology. Refer to manual for specific BMW LL-xxxx approvals if applicable for the later models.
Fluid Specifications Coolant
Coolant Specification:
BMW Blue coolant or equivalent silicate-free antifreeze. Capacity approx. 10-12 liters. Use a 50/50 mix with distilled water.
Common M30 Issues:
Oil leaks from valve cover and oil pan gaskets, fuel distributor issues, starter motor failures, coolant leaks from hoses and the water pump.
Common M60 Issues:
Nikasil cylinder wear (on earlier M60B40 engines), VANOS unit issues, coolant leaks, intake manifold gasket leaks, thermostat housing cracks.
Common M70 Issues:
Failure of the dual engine management systems, ignition coil failures (each cylinder has its own), hydraulic system leaks (for some components), oil leaks, and complexity of repairs.
Common E32 Issues:
Headlight leveling system failures, climate control blower motor resistors, door lock actuators, window regulators, ABS sensor failures, and aging wiring harness issues.
Oil Filter Part Number:
Manf. Part Numbers vary by filter brand. Examples: Mann-Filter W940/17, Mahle OX 35D. (Consult manual for exact OE BMW part numbers).
Air Filter Part Number:
Manf. Part Numbers vary. Examples: Mann-Filter C35120, Mahle LX550. (Consult manual for exact OE BMW part numbers).
Brand Heritage:
BMW has a long-standing reputation for building sporty luxury sedans and coupes, emphasizing 'The Ultimate Driving Machine' through superior handling, powerful engines, and driver-focused interiors.
Model Evolution:
The E32 replaced the E23 7 Series and was characterized by a more aerodynamic design and significant advancements in electronics and comfort features. It was succeeded by the E38 7 Series.
Production Period:
1986-1994 (model years 1988-1994 covered by this manual).
Manufacturing Locations:
Primarily manufactured in Dingolfing, Germany.
