🏷️ Basic Information

Make:

BMW

Model:

735i

Year:

1991

Chassis Code:

E32

👋 Introduction

Market Segment:

Luxury Sedan

Competitors:

Mercedes-Benz S-Class (W140), Lexus LS 400, Audi V8 Quattro

Vehicle Highlights:

Renowned for its sophisticated engineering, luxurious interior, smooth ride, and powerful inline-six engine. The E32 generation introduced advanced features for its time.

Usefulness:

Essential for owners and independent technicians to maintain, diagnose, and repair the 1991 BMW 735i, offering detailed, manufacturer-specific procedures and specifications.

📋 Manual Details

Systems Covered:

Engine, Drivetrain, Suspension, Steering, Brakes, Electrical System, HVAC, Body, Emissions, Diagnostics, Maintenance, Troubleshooting, Repair Procedures

Estimated Pages:

2000+

Type:

Official Service and Repair Manual Software

Language:

English

Format:

Software (Digital Download/Disc)

📖 Manual Coverage

Engine Mechanical:

Engine assembly, cylinder head, crankshaft, connecting rods, pistons, camshafts, valve train, lubrication system, cooling system, timing systems

Engine Management:

Bosch Motronic DME, fuel injection, ignition system, sensors (MAF, O2, TPS, CTS), actuators, emissions control systems

Drivetrain:

Manual and Automatic transmissions (Getrag, ZF), clutch assembly, driveshafts, differentials, axle shafts

Suspension:

Front and rear suspension systems, shock absorbers, struts, springs, control arms, bushings, subframes

Steering:

Power steering system, steering rack, steering column, tie rods, steering linkage

Brakes:

Front and rear disc brakes, ABS (Anti-lock Braking System), brake calipers, rotors, pads, master cylinder, brake lines, parking brake

Electrical System:

Battery, alternator, starter motor, wiring harnesses, lighting system, fuses, relays, instrument cluster, onboard computer (check control), power accessories

HVAC:

Air conditioning system, heater core, blower motor, climate control unit, ducting, refrigerant system

Body:

Body panels, doors, windows, locks, mirrors, sunroof, interior trim, bumpers, chassis structure

Maintenance:

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

Troubleshooting:

Diagnostic procedures for common malfunctions, fault code interpretation (if applicable to software), step-by-step diagnostic trees

Repair:

Component removal and installation, engine rebuild procedures, transmission overhaul, brake system repair, suspension component replacement, electrical component repair

Diagnostics:

Engine diagnostics, electrical system diagnostics, ABS diagnostics, HVAC diagnostics

Depth:

Comprehensive, covering basic maintenance to full engine and transmission rebuilds, including detailed electrical schematics and diagnostic information.

📊 Manual Specifications

File Type:

Proprietary software, potentially executable (.exe) or integrated into a platform. Expect interactive diagrams and search functionality.

Print Quality:

N/A (Digital Software)

Binding:

N/A (Digital Software)

Paper Type:

N/A (Digital Software)

⚙️ Engine Specifications

Engine Code:

M30B35

Engine Type:

Naturally Aspirated Inline 6-Cylinder

Displacement:

3.470 Liters (3470 cc)

Horsepower:

208 hp @ 5700 rpm (approx.)

Torque:

220 lb-ft @ 4000 rpm (approx.)

Fuel Delivery:

Bosch Motronic Electronic Fuel Injection (EFI)

Fuel Type:

Unleaded Premium Gasoline (91+ Octane)

Bore X Stroke:

92.0 mm x 86.0 mm

Compression Ratio:

8.0:1

Valve Train:

SOHC (Single Overhead Camshaft), 2 Valves per Cylinder

🔧 Transmission

Transmission Type:

4-Speed Automatic (ZF 4HP22)

Transmission Type Optional:

5-Speed Manual (Getrag 265)

Transmission Features Auto:

Sport mode, comfort mode

Automatic Transmission Fluid:

BMW ATF LT-3 or equivalent DEXRON II

Manual Transmission Fluid:

API GL-5, SAE 75W-90 Synthetic Gear Oil

📐 Dimensions

Length:

5024 mm (197.8 in)

Width:

1812 mm (71.3 in)

Height:

1400 mm (55.1 in)

Wheelbase:

2936 mm (115.6 in)

Curb Weight Auto:

1840 kg (4057 lbs)

Curb Weight Manual:

1800 kg (3968 lbs)

🛡️ Safety Features

NHTSA Ratings:

Not formally rated by NHTSA in the same manner as modern vehicles. Focus was on structural integrity and passive safety features.

Active Safety Features:

ABS (Anti-lock Braking System)

Passive Safety Features:

Reinforced passenger cell, crumple zones, driver's side airbag (optional on early models, likely standard by 1991), three-point seatbelts

💡 Technology Features

Audio System:

Optional premium sound systems (e.g., Harman Kardon), cassette player, AM/FM radio, potentially CD changer integration.

Advanced Features:

Cruise control, power adjustable steering column, memory seats, dual-zone climate control.

Onboard Systems:

Check Control system (onboard diagnostics and status monitoring), early trip computer functions.

🔧 Maintenance

Oil Change Interval:

Every 5,000-7,500 miles or 6-12 months, depending on driving conditions and oil type used. Check Control system may provide specific service reminders.

Coolant Flush Interval:

Every 2 years or 30,000 miles

Transmission Fluid Change Interval Auto:

Typically every 30,000-50,000 miles (BMW often stated 'lifetime' but this is debated; regular changes are recommended).

Engine Oil Specification:

API SJ/SL or ACEA A3/B3, viscosity SAE 5W-30 or 5W-40 (consult manual for specific BMW approvals).

Coolant Specification:

BMW Blue Antifreeze/Coolant (G48 ethylene glycol-based) or equivalent, mixed 50/50 with distilled water.

Brake Fluid Specification:

DOT 4

Common Failures:

Cooling system component failure (radiator, water pump, hoses), EHA valve issues (Electronic Hydraulic Actuator for idle speed control), fuel pump relay failure, ABS sensor failures, VANOS seal wear (if applicable to later M30 variants), door seal degradation, headliner sagging, Check Control system quirks.

Oil Filter Part Number Example:

Mann-Filter W 1058/1 or Mahle OX 82

Air Filter Part Number Example:

Mann-Filter C 35 153

📚 Vehicle History

Brand Focus:

BMW (Bayerische Motoren Werke AG) is renowned for producing high-performance luxury vehicles, focusing on driving dynamics and engineering excellence.

E32 Introduction:

The E32 generation of the BMW 7 Series debuted in 1986 as the successor to the E23. It represented a significant advancement in design, technology, and luxury.

Production Years E32:

1986-1994

Manufacturing Location:

Germany (primarily Dingolfing Plant)

🏆 Awards & Recognition

Automotive Press:

The E32 generation was generally praised by automotive journalists for its blend of luxury, performance, and technological innovation, solidifying BMW's position in the flagship sedan market.