🏷️ Basic Information

Make:

BMW

Model:

735iL

Year:

1990

Chassis Code:

E32

👋 Introduction

Segment:

Luxury Executive Sedan

Competitors:

Mercedes-Benz S-Class (W126/W140), Lexus LS 400 (UCF10), Jaguar XJ (XJ40).

Distinctive Attributes:

Renowned BMW driving dynamics, powerful inline-six engine, luxurious interior appointments, advanced (for its time) technology, emphasis on driver engagement.

📋 Manual Details

Systems Covered:

Engine Mechanical, Engine Management, Fuel System, Cooling System, Exhaust System, Transmission (Automatic), Drivetrain, Suspension, Steering, Brakes, ABS, Electrical System, Climate Control, Body, Interior, Troubleshooting, Diagnostics, Wiring Diagrams

Estimated Pages:

1500+

Type:

Official Service and Repair Manual Software

Language:

English

Format:

Digital Software (likely PDF or proprietary viewer)

📖 Manual Coverage

Engine Mechanical:

Detailed disassembly, inspection, and reassembly procedures for M30B35 engine, including cylinder head, block, crankshaft, connecting rods, pistons, valves, camshafts, timing chain.

Engine Management:

Bosch Motronic M3.3 engine control system diagnostics, sensor testing (crankshaft position, camshaft position, airflow meter, oxygen sensors, throttle position), actuator control, fuel injection, ignition timing.

Fuel System:

Fuel pump testing, fuel filter replacement, injector testing and cleaning, fuel pressure regulation, evaporative emission control (EVAP) system.

Cooling System:

Radiator, water pump, thermostat, coolant hoses, fan clutch, heater core replacement and service, coolant type and specifications.

Exhaust System:

Exhaust manifold, catalytic converter, muffler, oxygen sensor replacement, exhaust leak diagnosis.

Transmission:

ZF 4HP22 EH (Electronic Hydro-transmission) operation, fluid types, filter replacement, torque converter, valve body diagnostics, shift control.

Drivetrain:

Driveshaft U-joints, differential, rear axle servicing.

Suspension:

Front and rear suspension component identification, ball joints, control arms, bushings, shock absorbers, struts, springs, sway bars, wheel alignment specifications.

Steering:

Power steering pump, steering gear, tie rods, steering column, power steering fluid specifications.

Brakes:

Front and rear brake system components, pad and rotor replacement, caliper servicing, brake fluid type and bleeding procedures.

ABS:

ABS system operation, wheel speed sensors, hydraulic control unit, diagnostic procedures.

Electrical System:

Battery, charging system (alternator), starter motor, lighting system, power windows, power locks, power mirrors, central locking, interior lighting, fuse box locations and diagrams, relay functions.

Climate Control:

HVAC system operation, blower motor, evaporator, condenser, refrigerant type and charge, cabin air filter replacement, control panel diagnostics.

Body:

Door panel removal, hood latch, trunk lid, bumpers, exterior trim, glass replacement, sunroof operation and repair.

Interior:

Seat removal and adjustment, dashboard removal, instrument cluster, audio system, interior trim panel removal.

Maintenance:

Oil change intervals, spark plug replacement, air filter replacement, fuel filter replacement, coolant flush, transmission fluid and filter change, brake fluid flush, lubrication points.

Troubleshooting:

Diagnostic charts and flowcharts for common issues like starting problems, poor performance, overheating, electrical faults, brake system issues.

Repair:

Step-by-step repair instructions for virtually all mechanical and electrical components, from minor adjustments to major component replacements.

Installation:

Procedures for replacing common wear items and major components like alternators, starters, water pumps, brake calipers, suspension arms.

Depth:

Comprehensive, suitable for professional technicians and advanced DIY enthusiasts. Includes detailed torque specifications, diagnostic trouble codes (DTCs), and electrical schematics.

📊 Manual Specifications

Digital Format:

Likely searchable PDF or proprietary software with integrated search functionality, ensuring quick access to information.

Clarity:

High-resolution images, diagrams, and text, ensuring clear visibility of all details for printing or on-screen viewing.

Binding For Digital:

Not applicable for digital software, but designed for ease of navigation and user interaction.

Paper For Digital:

Not applicable for digital software. Optimized for screen display and printing.

⚙️ Engine Specifications

Engine Code:

M30B35

Engine Type:

3.5L SOHC Inline-6 Cylinder

Horsepower:

208 hp @ 5700 rpm

Torque:

225 lb-ft @ 4000 rpm

Injection System:

Bosch Motronic M3.3 Electronic Fuel Injection and Ignition

Fuel Type:

Unleaded Premium Gasoline (91 Octane or higher recommended)

🔧 Transmission

Type:

ZF 4HP22 EH 4-Speed Automatic Transmission

Type:

5-Speed Manual (Rare in North America for the 'iL' model)

Electronic Control:

Electronic shift control and mode selection (Sport/Economy).

📐 Dimensions

Wheelbase:

117.4 inches (2982 mm)

Length:

198.1 inches (5032 mm)

Width:

70.5 inches (1791 mm)

Height:

55.5 inches (1410 mm)

Curb Weight:

Approx. 3900-4100 lbs (1769-1860 kg)

🛡️ Safety Features

Crash Test Ratings:

While specific NHTSA ratings for 1990 models are not always readily available in modern databases, the E32 chassis was designed with a strong emphasis on occupant safety for its era.

ABS:

Standard Anti-lock Braking System (ABS)

Airbags:

Driver's side airbag (standard for 1990MY)

Structure:

Reinforced safety cage, crumple zones, side-impact protection.

💡 Technology Features

Audio System:

Factory premium audio system (e.g., Nakamichi or BMW branded) with cassette player. Optional CD changer.

Cruise Control:

Standard electronic cruise control.

Telematics:

Optional early cellular telephone integration.

🔧 Maintenance

Oil Change:

Typically every 5,000-7,500 miles or annually, depending on driving conditions. Check owner's manual for exact interval.

Transmission Fluid Change:

Recommended every 30,000-50,000 miles for the automatic transmission.

Engine Oil:

BMW High-Performance Synthetic 5W-30 or 5W-40 (API SG or higher). Check manual for precise specification.

Coolant:

BMW Blue Antifreeze/Coolant (G48 or equivalent) mixed 50/50 with distilled water.

Transmission Fluid:

Dexron II E or equivalent synthetic ATF (e.g., Pentosin ATF-1, Mobil ATF 220).

Brake Fluid:

DOT 4 Low Viscosity brake fluid.

Common Problems:

Head gasket leaks, cooling system component failures (radiator, hoses, water pump), fuel distributor issues (older models), ABS sensor failures, front suspension bushing wear, window regulator failures, MAF sensor issues.

Maintenance Focus:

Regular maintenance is crucial for longevity. Pay close attention to cooling system health and fuel system component integrity.

📚 Vehicle History

Bmw Legacy:

BMW's long-standing reputation for engineering excellence, sporty driving characteristics, and luxury.

E32 Introduction:

The E32 generation was introduced in 1986, succeeding the E23. The 'iL' designation signifies the long-wheelbase variant, offering increased rear legroom.

Manufacturing Location:

Dingolfing, Germany

🏆 Awards & Recognition

Automotive Press:

Consistently praised by automotive press for its blend of luxury, performance, and technology, establishing BMW's presence in the high-end luxury sedan market.