🏷️ Basic Information

Make:

BMW

Model:

7 Series

Model Variant:

735i, 735iL

Year:

1988

Chassis Code:

E32

👋 Introduction

Market Segment:

Full-size luxury sedan. Competed with Mercedes-Benz S-Class, Jaguar XJ, and Cadillac Fleetwood.

Key Competitors:

Mercedes-Benz W126 S-Class, Jaguar XJ40, Audi V8 Quattro, Lexus LS 400 (later in the generation's life).

Design Philosophy:

Emphasis on driver-focused engineering, sophisticated ride and handling, advanced technology for its time, and a blend of performance and luxury.

Innovations:

Introduction of the E32 generation brought significant updates in chassis design, electronics, and safety features over its predecessor (E23).

📋 Manual Details

Coverage:

Full Service and Repair

Estimated Pages:

High (typically 800-1200+ pages for a full BMW workshop manual of this era)

Type:

Workshop Manual / Service Repair Manual

Language:

English

Format:

Likely printed (original manufacturer documentation), potentially available as a high-quality digital scan (PDF)

📖 Manual Coverage

Engine Mechanical:

Engine removal/installation, cylinder head, valve train, crankshaft, pistons, connecting rods, lubrication system, cooling system

Engine Management:

Fuel injection system (Bosch Motronic), ignition system, emission control systems, engine diagnostics, sensors, actuators

Transmission:

Manual transmission (Getrag 260/5, 260/6) and Automatic transmission (ZF 4HP22) service, overhaul, and adjustments

Drivetrain:

Clutch, driveshaft, differential, rear axle assembly, lubrication

Suspension:

Front suspension (MacPherson struts), rear suspension (independent trailing arms), shock absorbers, springs, control arms, bushings, wheel alignment

Steering:

Power steering system, steering gear, steering column, steering wheel, tie rods, power steering fluid specifications

Brakes:

Front disc brakes (ventilated), rear disc brakes, ABS (Anti-lock Braking System) components, hydraulic system, brake pad replacement, caliper service, brake fluid specifications

Electrical System:

Battery, charging system (alternator), starting system (starter motor), lighting system, fuses, relays, wiring diagrams, electrical component testing

Bodywork And Chassis:

Body panel removal/installation, door mechanisms, window regulators, sunroof operation, interior trim, exterior trim, body repairs, rust prevention

Climate Control:

HVAC system operation, components, refrigerant, troubleshooting

Seatbelts:

Seatbelt operation and maintenance

Routine Maintenance:

Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, air filter replacement, belt inspection and replacement

Troubleshooting:

Diagnostic procedures for common problems, fault code interpretation (if applicable to the era/system), symptom-based diagnosis

Repair And Overhaul:

Detailed step-by-step instructions for component removal, repair, reassembly, and installation

Special Tools:

Identification of required special tools for specific procedures and their usage

Technical Specifications:

Torque specifications for critical fasteners, clearances, measurements, tolerances

Depth:

Comprehensive; suitable for professional mechanics and advanced DIY enthusiasts. Covers everything from basic maintenance to complete engine and transmission rebuilds, including electrical system diagnostics and bodywork.

📊 Manual Specifications

Digital Quality:

If PDF, expect high-resolution scans of original pages, often searchable text, clear diagrams and illustrations.

Print Quality:

Original BMW manuals are known for high-quality paper, clear printing, and detailed, accurate illustrations.

Binding:

Original manuals are typically hardcover or robust spiral-bound. Reprints may vary.

Paper Type:

Durable, often glossy or semi-gloss paper suitable for workshop environments.

⚙️ Engine Specifications

Engine Code:

M30B35

Engine Type:

Inline 6-cylinder, SOHC (Single Overhead Camshaft)

Displacement:

3430 cc (3.4 Liters)

Horsepower:

Approx. 208 hp (155 kW) at 5700 rpm (U.S. specification)

Torque:

Approx. 224 lb-ft (304 Nm) at 4000 rpm (U.S. specification)

Fuel Delivery:

Bosch Motronic electronic fuel injection (EFI)

Fuel Type:

Unleaded gasoline, premium octane recommended

Coolant Type:

BMW recommends a mixture of distilled water and ethylene glycol antifreeze (typically 50/50 mix). Specific BMW coolant P/N may be cited in manual.

Oil Capacity:

Approx. 6.5 quarts (6.2 liters) with filter change

Oil Specification:

API SG, ACEA A3/B3, or BMW Longlife-01 (depending on specific BMW recommendations at the time or later updates). Viscosity typically 10W-40 or 15W-50, consult manual for precise guidance.

🔧 Transmission

Transmission Type:

5-speed manual (Getrag 260/5 or 260/6)

Transmission Type:

4-speed automatic (ZF 4HP22)

Automatic Modes:

Often featured Sport and Economy modes.

Automatic Transmission Fluid:

Typically Dexron II or equivalent. Manual transmission fluid type will be specified (e.g., GL-4 or GL-5).

📐 Dimensions

Length:

735i: Approx. 197.4 inches (5014 mm); 735iL: Approx. 204.9 inches (5205 mm)

Width:

Approx. 70.5 inches (1791 mm)

Height:

Approx. 54.8 inches (1392 mm)

Wheelbase:

735i: Approx. 116.9 inches (2970 mm); 735iL: Approx. 122.5 inches (3111 mm)

Curb Weight:

Approx. 3700-3900 lbs (1680-1770 kg), varying by options and transmission

Gross Vehicle Weight Rating:

Typically around 4700-4900 lbs (2130-2220 kg)

🛡️ Safety Features

Crash Test Results:

While official government crash test ratings for this specific year and model are scarce by modern standards, BMW vehicles of this era were engineered with robust safety structures. Specific ratings from NHTSA or IIHS are unlikely to be available or comparable to current standards.

ABS:

Standard Anti-lock Braking System (ABS)

Airbags:

Driver's airbag was optional and becoming more common on high-end vehicles of this era; check specific vehicle configuration.

Body Structure:

Reinforced safety cage, energy-absorbing crumple zones.

💡 Technology Features

Audio System:

High-fidelity BMW sound systems, often with Nakamichi or premium speaker options. Cassette tape player standard.

HVAC System:

Automatic climate control (IHKA - Integrated Automatic Climate Control) was a hallmark feature, offering dual-zone temperature control and automatic fan speed adjustment.

Cruise Control:

Standard electronic cruise control.

Phone Integration:

Optional early car phone integration was available on some models.

🔧 Maintenance

Oil Change Interval:

Typically every 3,000-7,500 miles (5,000-12,000 km) or 6-12 months, depending on driving conditions and oil type used. The manual will provide precise BMW recommendations.

Spark Plug Replacement:

Typically every 30,000 miles (48,000 km) for standard plugs, potentially longer for specific types if used by BMW.

Coolant Flush:

Recommended every 2-3 years or 30,000-50,000 miles (48,000-80,000 km).

Transmission Fluid Change:

Automatic: Typically every 50,000-100,000 miles (80,000-160,000 km). Manual: Less frequent, often 60,000-100,000 miles (96,000-160,000 km). Consult manual for exact intervals.

Brake Fluid:

DOT 3 or DOT 4 hydraulic brake fluid. Always use fresh, sealed fluid.

Power Steering Fluid:

Specific power steering fluid or Dexron II/III ATF is often specified. Manual will clarify.

Coolant Capacity:

Approximately 10.5 quarts (10 liters)

Engine M30:

Generally robust, but can suffer from oil leaks (valve cover gasket, oil pan gasket), cooling system issues (radiator, hoses, water pump), and potential head gasket leaks if overheated. Timing chain guides and tensioners should be inspected at higher mileage.

Electronics:

Age-related electrical gremlins, including failing climate control units (IHKA), instrument cluster issues, and wiring harness degradation, are common.

Suspension And Steering:

Worn control arm bushings, worn tie rods, and aging power steering components can lead to steering play and handling degradation.

ABS System:

ABS sensors, control modules, and hydraulic units can fail with age, leading to ABS warning lights and loss of ABS function.

📚 Vehicle History

Bmw Legacy:

BMW has a long history of producing performance-oriented luxury vehicles, known for engineering excellence and driver engagement.

E32 Generation:

The E32 generation (1986-1994) replaced the E23 7 Series. It represented a significant advancement in design, technology, and size, establishing BMW's flagship sedan as a strong contender in the global luxury market.

Manufacturing Location:

Primary production was in Dingolfing, Germany.

Production Years E32:

1986-1994

🏆 Awards & Recognition

Automotive Journalism:

The E32 7 Series was generally well-received by automotive press for its refinement, performance, and technological features, often earning praise as one of the best luxury sedans of its time.