🏷️ Basic Information

Make:

BMW

Model:

735i / 735iL

Year:

1989

Chassis Code:

E32

Engine Code Variant:

M30B35

👋 Introduction

Positioning:

The BMW 735i/iL (E32) represented the pinnacle of luxury and technology for BMW in the late 1980s, directly competing with established luxury sedans from Mercedes-Benz and Jaguar. This manual targets owners and independent mechanics seeking to maintain or repair these sophisticated vehicles.

Competitors:

Mercedes-Benz W124, Jaguar XJ40, Lexus LS400 (late in the E32's lifecycle).

Vehicle Highlights:

Smooth M30 inline-six engine, comfortable ride, advanced (for its time) technology like ABS and early on-board computers, luxurious interior appointments.

📋 Manual Details

Primary Coverage:

Service, Repair, Maintenance, Diagnostics

Estimated Page Count:

Approximately 1000+

Type:

Workshop Manual / Service Manual

Language:

English

Format:

Likely Printed Reproduction or PDF Digital Format

📖 Manual Coverage

Engine:

M30B35 Engine: Overhaul, Tuning, Component Identification, Lubrication System, Cooling System, Fuel System (Bosch Motronic), Ignition System

Transmission:

4-Speed Automatic (ZF 4HP22), Manual Transmission (Getrag 260/5): Overhaul, Fluid Changes, Clutch System, Driveshaft, Differential

Brakes:

Front and Rear Disc Brakes, ABS (Anti-lock Braking System): Service, Bleeding, Component Replacement, Hydraulic System

Electrical:

Complete Electrical Schematics, Engine Control Unit (ECU), Lighting, Instrumentation, Power Windows, Central Locking, Radio, Climate Control, Diagnostic Connectors

Suspension Steering:

Front MacPherson Struts, Rear Independent Suspension (Trailing Arms), Power Steering System: Alignment, Component Replacement, Bushings

Bodywork Chassis:

Body Panel Removal and Installation, Door Mechanisms, Hood and Trunk Latches, Glass Replacement, Underbody Protection

Climate Control:

HVAC System: Compressor, Condenser, Evaporator, Blower Motor, Recharging, Troubleshooting

Fuel System:

Fuel Pump, Injectors, Fuel Filter, Fuel Tank, Pressure Regulator (Bosch LE-Jetronic/Motronic)

Cooling System:

Radiator, Water Pump, Thermostat, Coolant Hoses, Fan Clutch

Maintenance:

Oil Changes, Filter Replacements, Spark Plug Service, Coolant Flush, Belt Tensioning, Brake Pad Replacement

Troubleshooting:

Diagnostic procedures for common issues, fault code interpretation (if applicable for the era), symptom-based diagnosis

Engine Repair:

Cylinder Head Gasket Replacement, Piston Ring Installation, Valve Adjustment, Bearing Replacement, Complete Engine Rebuild

Transmission Repair:

Automatic Transmission Overhaul, Manual Gearbox Rebuild, Clutch Replacement

Electrical Diagnostics:

Wiring Harness Repair, Sensor Testing, Actuator Testing, ECU Diagnosis

Brake System Service:

Brake Caliper Rebuild, Rotor Replacement, ABS Sensor Replacement, Hydraulic Line Replacement

Suspension Steering Repair:

Control Arm Bushing Replacement, Strut Replacement, Tie Rod End Replacement, Power Steering Pump Replacement

Body Repair:

Panel Alignment, Dent Removal Techniques, Rust Prevention and Repair

Depth:

Comprehensive: From basic maintenance and fluid checks to full engine and transmission rebuilds, including detailed diagnostic procedures and wiring diagrams.

📊 Manual Specifications

Digital Format Details:

If PDF: Searchable text, bookmarked sections, high-resolution images and diagrams. If Printed: Clear text, legible diagrams, professional binding.

Print Quality Expectation:

High-quality paper and printing for durability and clarity of diagrams.

Binding Type Expectation:

Durable binding (e.g., spiral, perfect binding for digital copies, or sturdy sewn binding for printed reproductions) to withstand workshop use.

Paper Type Expectation:

Durable, semi-gloss paper suitable for workshop environments, resisting grease and moisture.

⚙️ Engine Specifications

Engine Type:

Naturally Aspirated Inline 6-Cylinder

Engine Code:

M30B35

Displacement:

3.430 cc (3.4 Liters)

Horsepower Rating:

Approximately 208 hp (155 kW) at 5700 rpm

Torque Rating:

Approximately 225 lb-ft (305 Nm) at 4000 rpm

Fuel Injection System:

Bosch Motronic (likely Motronic ML4.1 or similar, with L-Jetronic heritage)

Recommended Fuel:

Premium Unleaded (91 Octane or higher)

Ignition Type:

Electronic Ignition with Distributor and Coil

🔧 Transmission

Standard Transmission:

5-Speed Manual (Getrag 260/5)

Optional Transmission:

4-Speed Automatic (ZF 4HP22)

Automatic Features:

Adaptive shift logic (Sport/Economy modes in some variants)

📐 Dimensions

Wheelbase 735I:

2,830 mm (111.4 inches)

Wheelbase 735Il:

3,010 mm (118.5 inches)

Length 735I:

4,910 mm (193.3 inches)

Length 735Il:

5,060 mm (199.2 inches)

Curb Weight Approx:

1,700 - 1,800 kg (3,750 - 3,970 lbs)

🛡️ Safety Features

Crash Test Data:

While specific NHTSA/Euro NCAP ratings for this exact model year are scarce, BMW vehicles of this era were known for robust safety cages and advanced passive restraint systems for their time.

ABS:

Standard Anti-lock Braking System (ABS)

Airbags:

Driver's side airbag was optional or became standard later in the E32 production run for this specific model, passenger airbag not common.

Seatbelts:

Three-point inertia-reel seatbelts front and rear.

💡 Technology Features

Audio System:

BMW Professional RDS cassette stereo with optional CD changer. Early E32 models may have simpler radio units.

ABS System:

Bosch ABS II or similar, providing enhanced braking stability.

Onboard Computer:

Optional Check Control system and early trip computers for monitoring vehicle status and diagnostics.

Power Features:

Power windows, power seats (with memory on some models), power mirrors, central locking, cruise control.

HVAC System:

Automatic climate control with dual-zone functionality in later models, or manual HVAC.

🔧 Maintenance

Oil Change Interval:

Typically every 5,000-7,500 miles (8,000-12,000 km) or annually, depending on driving conditions and oil quality. Consult manual for specific recommendations.

Transmission Fluid Change:

Automatic transmission fluid and filter typically recommended every 30,000-50,000 miles (48,000-80,000 km).

Spark Plugs:

Recommended replacement around 30,000-60,000 miles depending on plug type (platinum expected).

Engine Oil Type:

Synthetic SAE 15W-40 or 10W-40 (depending on climate). Refer to manual for exact BMW LL specification if applicable, though early spec might differ from modern ones.

Coolant Type:

Ethylene Glycol based antifreeze, typically a 50/50 mix with distilled water. BMW coolant specific or equivalent. Check manual for specific color/type.

Automatic Transmission Fluid:

ZF TE-ML 04D, TE-ML 07A, or equivalent Dexron II/III (verify with manual/ZF specs).

Brake Fluid Type:

DOT 3 or DOT 4

Common Problems 1:

Cooling system leaks (hoses, water pump, radiator), Heater control valve failure, ABS sensor failures, Vanos seals (if applicable, though M30 does not have VANOS), Crankshaft position sensor failure, Ebox fan failure, Door handle microswitch failures.

Common Problems 2:

Subframe bushings, rear axle carrier bushings, sagging headliner, SRS system warning lights (airbag system)

📚 Vehicle History

Bmw Legacy:

BMW's reputation for building driver-focused, well-engineered vehicles with a focus on performance and luxury.

E32 Generation:

The E32 generation (1986-1994) replaced the E23 7 Series. It introduced a more aerodynamic design and significant technological advancements, setting the stage for future BMW luxury sedans. The 735i and its long-wheelbase counterpart, the 735iL, were the flagship models for much of this generation.

Production Years:

E32 production ran from 1986 to 1994. The 735i model was a key offering throughout this period.

🏆 Awards & Recognition

Automotive Press Awards:

While specific awards for the 1989 model may not be as widely publicized as later generations, the E32 7 Series was consistently praised by automotive journalists for its engineering, ride quality, and performance, often appearing on 'best of' lists for luxury sedans of its era.