🏷️ Basic Information

Make:

BMW

Model:

7 Series

Model Variant:

735i

Year:

1988-1994

Chassis Code:

E32

👋 Introduction

Market Position:

The BMW 7 Series (E32) represented the pinnacle of luxury, technology, and performance in its era, directly competing with flagship sedans from Mercedes-Benz (W126 S-Class), Jaguar, and Lexus.

Competitive Analysis:

The 735i offered a blend of smooth power, advanced (for the time) electronics, and superior driving dynamics compared to many contemporaries, establishing BMW's reputation for 'The Ultimate Driving Machine' even in the luxury segment.

Key Features:

The E32 7 Series was known for its sophisticated independent suspension, powerful inline-six engines, advanced onboard computer, and optional features like the self-leveling suspension and power-adjustable rear seats.

Interior Features:

Luxurious leather upholstery, wood trim accents, power-adjustable seats with memory, heated seats (optional), dual-zone climate control, power sunroof, and automatic climate control were hallmarks of the E32's premium interior.

📋 Manual Details

Systems Covered:

Engine, Drivetrain, Suspension, Steering, Brakes, Fuel System, Cooling System, Electrical System, Climate Control, Body, Interior, Diagnostics, Troubleshooting, Maintenance Procedures

Page Count:

Extensive (Exact number not specified, but implies comprehensive coverage)

Manual Type:

Official Full Service Repair Manual

Language:

English (assumed from product description and typical market)

Format:

Digital (PDF implied, but may also refer to print availability)

📖 Manual Coverage

Engine Mechanical:

Engine assembly, cylinder head, pistons, crankshaft, camshafts, valve train, timing components, lubrication system, oil pump, oil filter housing

Engine Management:

Motronic engine management system, fuel injection (DME), ignition system, sensors (MAP, MAF, O2, coolant temp, crank position), actuators (injectors, ignition coils)

Drivetrain:

Transmission (automatic/manual), differential, driveshafts, CV joints, clutch system (if manual)

Suspension Steering:

Front and rear suspension components, shock absorbers, struts, control arms, bushings, steering rack, power steering system, hydraulic steering

Brakes:

Brake system components, hydraulic lines, master cylinder, brake boosters, ABS (Anti-lock Braking System), brake pad replacement, rotor resurfacing/replacement, caliper service

Fuel System:

Fuel pump, fuel filter, fuel injectors, fuel lines, fuel tank, evaporative emission control (EVAP)

Cooling System:

Radiator, water pump, thermostat, cooling fan, heater core, coolant hoses, pressure cap

Electrical System:

Battery, alternator, starter motor, lighting system, wiring diagrams, fuses, relays, electrical component testing, diagnostic trouble codes (DTCs)

Climate Control:

Air conditioning system (compressor, condenser, evaporator, refrigerant charging), heating system, blower motor, climate control module

Body Interior:

Body panels, doors, hood, trunk, interior trim, seats, dashboard, exterior lighting, windows, locks

Body And Chassis:

Body structural repair, panel replacement, door mechanisms, window regulators, trunk lid operation, chassis lubrication points.

Climate Control Diagnostics:

Troubleshooting HVAC system faults, refrigerant handling and charging procedures (EPA 609 certification may be required for refrigerant work).

Maintenance:

Oil change, filter replacement, spark plug replacement, coolant flush, brake fluid replacement, transmission fluid service, air filter replacement, belt inspection and replacement

Troubleshooting:

Step-by-step diagnostic procedures for common and uncommon issues, electrical system troubleshooting, engine performance problems

Repair:

Detailed instructions for component removal, installation, and repair (e.g., engine rebuild, transmission overhaul, suspension component replacement, brake caliper overhaul)

Diagnostics:

Diagnostic procedures utilizing BMW's diagnostic tools (e.g., DIS, MoDiC - though specific tool names might not be in the manual, the principles apply), fault code reading and interpretation

Electrical Diagnostics:

Detailed troubleshooting of electrical faults using wiring diagrams, component testing procedures, and diagnostic charts. Coverage of Motronic system fault codes.

Suspension Alignment:

Specifications and procedures for front and rear wheel alignment, critical for handling and tire wear.

Body Panel Replacement:

Guidelines for removing and installing body panels, including door, fender, and hood adjustments.

Technical Depth:

Comprehensive, covering everything from basic scheduled maintenance to full engine and transmission rebuilds, including detailed torque specifications and diagnostic flowcharts.

Engine Rebuild Procedures:

Complete engine disassembly, inspection, measurement, and reassembly procedures, including critical clearances and tolerances.

Transmission Overhaul Procedures:

Detailed steps for the overhaul of the ZF automatic transmission, including torque converter, valve body, and clutch pack replacement.

Electrical Component Replacement:

Detailed instructions for replacing all major electrical components, including starter, alternator, fuel pump, window motors, and sensors.

📊 Manual Specifications

File Format:

PDF (Likely, for digital versions)

Print Quality:

High-resolution scans of original factory documentation, ensuring clarity of diagrams and text.

Binding Type:

N/A (For digital), Perfect Bound/Spiral Bound (If printed)

Paper Type:

N/A (For digital), High-quality paper stock (If printed)

Completeness:

Official factory service manual, providing a complete and authorized guide to maintenance, repair, and diagnostics for the specified vehicle.

Usability Features:

Clear chapter structure, exploded views of components, step-by-step instructions, torque specifications, special tool requirements, and diagnostic flowcharts enhance ease of use for both professional technicians and advanced DIY enthusiasts.

⚙️ Engine Specifications

Engine Code:

M30B35

Engine Type:

Inline 6-cylinder, naturally aspirated

Displacement:

3.5 Liters (3430 cc)

Bore X Stroke:

92.0 mm x 86.0 mm

Compression Ratio:

8.0:1 or 8.5:1 (depending on market/year)

Horsepower:

Approx. 208-211 hp (155-157 kW) @ 5700 rpm

Torque:

Approx. 220-224 lb-ft (298-304 Nm) @ 4000 rpm

Fuel System Type:

Bosch Motronic electronic fuel injection (DME)

Fuel Type:

Unleaded gasoline (RON 91 or higher recommended)

Coolant Capacity:

Approx. 9.5 Liters (with heater)

Emission Controls:

Catalytic converter, oxygen sensors, secondary air injection system (depending on market and year).

🔧 Transmission

Transmission Type:

4-speed automatic (ZF 4HP22)

Transmission Type:

5-speed manual (Getrag 265 - rare in US market)

Transmission Features:

Automatic transmission featured Sport and Economy modes. Manual transmission offered close-ratio gearing for spirited driving.

Automatic Transmission Fluid:

BMW ATF Dexron II or equivalent (Check manual for specific part number recommendations)

Automatic Transmission Fluid Capacity:

Approx. 1.5 Liters (dry fill), 4.0-4.5 Liters (total capacity)

📐 Dimensions

Length:

Approx. 4970 mm (195.7 in)

Width:

Approx. 1800 mm (70.9 in)

Height:

Approx. 1400 mm (55.1 in)

Wheelbase:

Approx. 2900 mm (114.2 in)

Curb Weight:

Approx. 1700-1800 kg (3748-3968 lbs)

Gross Vehicle Weight:

Approx. 2200 kg (4850 lbs)

Trunk Capacity:

Approx. 500 Liters (17.6 cu ft)

🛡️ Safety Features

Crash Test Ratings:

Not subjected to modern standardized crash testing protocols like NHTSA/Euro NCAP. However, built with substantial safety cage and crumple zones for its era.

Active Safety Features:

Anti-lock Braking System (ABS), Servotronic power steering (speed-sensitive)

Passive Safety Features:

Driver and front passenger airbags (introduced later in the production run, check specific VIN), seatbelt pre-tensioners, reinforced chassis structure, energy-absorbing interior components.

💡 Technology Features

Infotainment Features:

Original Blaupunkt or BMW branded cassette/radio systems. Optional CD changer. On-Board Computer (OBC) displaying fuel economy, range, outside temperature, and basic system diagnostics.

Driver Assistance Features:

ABS, power steering, cruise control. Some models featured electronic suspension adjustment (EDC - Electronic Damper Control).

Connectivity Features:

Limited by modern standards. Basic telephone integration optional in later models. Diagnostic port for early OBD-I systems.

🔧 Maintenance

Oil Change Interval:

Every 7,500-10,000 miles or 12 months, whichever comes first (depending on driving conditions; consult manual).

Spark Plug Replacement Interval:

Approx. 30,000 miles (for standard plugs); platinum/iridium plugs may extend this significantly.

Transmission Fluid Service Interval:

Every 30,000-50,000 miles (recommended for longevity, though BMW historically claimed 'lifetime' fluid).

Engine Oil Specification:

API SG or higher, SAE 15W-40 or 10W-40 (Check manual for specific viscosity recommendation based on ambient temperature).

Engine Coolant Specification:

BMW Blue Coolant (G48 ethylene glycol based) or equivalent with corrosion inhibitors. 50/50 mix with distilled water.

Power Steering Fluid:

BMW Power Steering Fluid (Pentosin CHF 11S or equivalent - **critical to use correct fluid to avoid pump damage**).

Brake Fluid Specification:

DOT 3 or DOT 4 brake fluid (Consult manual for specific recommendation).

Known Issues:

Cooling system leaks (hose, radiator, water pump), head gasket issues (especially on high mileage M30 engines), subframe bushings, ABS sensor failures, door handle microswitches, blower motor resistor failure, OBC (On-Board Computer) pixelation.

Common Maintenance Items:

Regular replacement of cooling hoses, drive belts, and thermostat is crucial. Checking and cleaning the idle control valve (ICV) helps maintain smooth idle.

📚 Vehicle History

Brand Heritage:

BMW, established in 1916, has a long history of producing high-quality, performance-oriented vehicles, initially aircraft engines, then motorcycles, and finally automobiles. The brand is synonymous with engineering excellence and driving pleasure.

Model Evolution:

The E32 generation represented a significant leap forward from its predecessor, the E23 7 Series. It introduced a more aerodynamic and modern design, advanced electronics, and improved chassis dynamics. It was succeeded by the E38 7 Series.

Chassis Code Significance:

E32 denotes the second generation of the BMW 7 Series, succeeding the E23. It was built on a new platform and introduced significant styling and technological advancements.

Production Years:

1986-1994

Manufacturing Locations:

Dingolfing, Germany

🏆 Awards & Recognition

Recognitions:

While specific awards for the 1988-1994 735i model are not widely publicized as individual accolades, the E32 generation was consistently praised by automotive journalists for its blend of performance, luxury, and technological innovation, earning it a strong reputation as a class-leading luxury sedan.

Ratings:

Consistently rated highly for build quality, ride comfort, and driving dynamics by contemporary automotive publications such as Car and Driver, MotorTrend, and Road & Track.