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BMW

BMW 735i-Il 735il-750iL (e32) 1987-1988 Electrical TROUBLE

BMW 735i-Il 735il-750iL (e32) 1987-1988 Electrical TROUBLE

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Vehicle data plateRef 307632
Brand
BMW
Vehicle
Cars
Models covered
7 Series, 735i-Il, 735il, 750iL
Years
1987, 1988
Format
PDF, searchable, print-ready
Delivery
Instant download after checkout
Language
English

What happens after you pay

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  • The same link is emailed to you — re-download any time
  • Open on phone, tablet or PC; print only the pages you need
  • Not sure it covers your model year? Ask us before you buy
🏷️ Basic Information
Identification
Make:
BMW
Model:
7 Series
Model Variant:
735i, 735iL, 750iL
Chassis Code:
E32
Production Years Covered:
1987-1988
Codes
Engine Code 735:
M30B35
Engine Code 750:
M70B50
👋 Introduction
Market Position
Segment:
Full-size luxury sedan
Target Audience:
Affluent buyers seeking performance, comfort, and advanced technology
Competitive Analysis
Key Competitors:
Mercedes-Benz S-Class, Audi V8 Quattro, Jaguar XJ-S
Key Features Of Vehicle
Design Philosophy:
Elegant styling, driver-focused interior, advanced engineering
Technology Emphasis:
Pioneering use of electronics for comfort, safety, and performance management
Value Proposition Of Manual
Cost Savings:
Enables owners to perform repairs themselves, saving significant labor costs
Accessibility:
Provides technical information understandable even to those with basic mechanical knowledge
📋 Manual Details
Coverage Areas
Primary Focus:
Electrical Systems and Troubleshooting
Secondary Focus:
Component-specific diagnostics and repair
Page Count
Estimated Page Count:
N/A (specific page count not provided, but comprehensive based on contents)
Manual Type
Type:
Electrical Troubleshooting Manual / Repair Manual
Language
Language:
English (implied by content and typical workshop manuals)
Format
Format:
Printed (indicated by 'manual what will be send to you')
📖 Manual Coverage
Systems Covered
Power Distribution:
Comprehensive power distribution charts and diagrams
Fuses:
Fuse charts, fuse details, and locations
Grounds:
Ground distribution diagrams and specifications
Engine Control:
Engine Control System wiring and diagnostics
Charging System:
Charging System schematics and troubleshooting
Starting System:
Starter system wiring and diagnostics
Transmission Control:
Electronic Transmission Control (ETC) wiring and diagnostics
Restraint System:
Supplemental Restraint System (SRS) - airbag system details
ABS:
Slip Control (ABS) system schematics and troubleshooting
Comfort Features:
Power Mirrors, Central Locking, Power Windows, Power Seats, Heated Seats, Power Sun Roof
Lighting:
Headlights, Fog Lights, Turn/Hazard Lights, Park/Tail/Underhood Lights, License Plate/Luggage Compartment Lights, Back-up Lights, Brake Lights, Interior Lights, Glove Box/Cassette Box/Ashtray Lights, Charging Socket
Washers:
Wiper/Washer Module, Headlight Washer, Windshield Washer Jet Heaters
Climate Control:
Integrated Climate Regulation, Park/Ventilation with HKR (Heated Condition Recirculation)
Infotainment:
Radio/CD Player, Radio/Hi-Fi, Cellular Telephone
Convenience:
Multi-Function Clock, On-Board Computer, Cruise Control (Tempomat), Anti-Theft System
Instrumentation:
Instrument Cluster wiring and diagnostics
Procedures Included
Troubleshooting:
Systematic troubleshooting procedures based on symptoms and electrical diagrams
Component Testing:
Testing procedures for individual electrical components
Wiring Analysis:
Analysis of wiring harnesses and connections
Diagnostics:
Diagnostic strategies for electrical faults
Data Link:
Information on data link connectors and communication protocols for the era
Technical Depth
Depth:
Detailed wiring diagrams, component locations, connector views, and splice locations
Explanations:
Step-by-step explanations for understanding electrical functions and repairs
Illustrations:
Illustrations and diagrams, including depth illustrations
📊 Manual Specifications
File Format
Electronic Format:
N/A (physical copy implied)
Print Quality
Quality:
Expected to be high quality, as used by garages/workshops
Binding Type
Binding:
Likely bound for workshop durability
Paper Type
Paper Quality:
Durable paper suitable for workshop use
⚙️ Engine Specifications
Primary Engine 735
Engine:
3.5L Inline-6 (M30B35)
Horsepower 735:
Approx. 208 hp @ 5,700 rpm
Torque 735:
Approx. 225 lb-ft @ 4,000 rpm
Fuel System 735:
Bosch Motronic electronic fuel injection
Primary Engine 750
Engine:
5.0L V12 (M70B50)
Horsepower 750:
Approx. 295 hp @ 5,200 rpm
Torque 750:
Approx. 332 lb-ft @ 3,700 rpm
Fuel System 750:
Dual Bosch Motronic electronic fuel injection (one per bank)
🔧 Transmission
Standard Transmission
Type:
4-speed automatic (ZF 4HP22/4HP24 depending on model/year)
Optional Transmission
Type:
5-speed manual (less common, primarily for 735i)
Features
Electronic Control:
Electronic Transmission Control (ETC) for shift quality and diagnostics
📐 Dimensions
Exterior 735I
Wheelbase:
111.4 inches (2,830 mm)
Exterior 735Il
Wheelbase:
116.7 inches (2,965 mm)
Exterior 750Il
Wheelbase:
116.7 inches (2,965 mm)
Weights 735I
Curb Weight:
Approx. 3,700 lbs (1,680 kg)
Weights 750Il
Curb Weight:
Approx. 4,400 lbs (2,000 kg)
🛡️ Safety Features
Ratings
NHTSA Rating:
N/A (No standardized ratings for this era)
Active Features
ABS:
Standard Anti-lock Braking System (ABS)
Passive Features
Airbags:
Driver's side airbag (standard on most models/markets for this period), Supplemental Restraint System (SRS)
Chassis Construction:
Reinforced safety cage, crumple zones
💡 Technology Features
Infotainment
Audio Systems:
BMW Bavaria C, C II, C Business, C Professional radios; optional CD player
Hifi:
Optional Hi-Fi sound systems with amplifier and multiple speakers
Driver Assistance
Cruise Control:
Standard 'Tempomat' cruise control
Parking Aid:
Early versions of parking sensors might be present on later E32s, but not standard on 1987-1988 models
Connectivity
Telephone:
Optional integrated cellular telephone system
Onboard Computer
Functionality:
On-Board Computer (OBC) providing diagnostics, fuel economy, and travel information
🔧 Maintenance
Service Intervals
Oil Change:
Typically every 7,500-10,000 miles or 12 months, depending on driving conditions (consult manual for specifics)
Major Service:
Major services often due around 60,000 miles or 5 years, involving spark plugs, belts, coolant flush, etc.
Fluid Specifications
Engine Oil 735:
API SG, SAE 15W-40 or 20W-50 (check manual for exact viscosity based on climate)
Engine Oil 750:
API SG, SAE 15W-50 or 20W-50 (check manual for exact viscosity based on climate)
Transmission Fluid Automatic:
Dexron III or equivalent (check manual for precise specification and type)
Coolant:
BMW approved ethylene glycol coolant (typically 50/50 mix with distilled water)
Known Issues
Electrical:
ABS sensor failures, headlight leveling system issues, central locking pump failures, window regulator failures, pixelated instrument cluster displays (common on many BMWs of this era)
Engine M30:
Oil leaks (valve cover gasket, oil pan gasket), coolant leaks (hose failures, water pump), starter motor issues
Engine M70:
Eccentric shaft sensors, ignition coil failures, idle control valve issues, coolant leaks
Suspension:
Worn control arm bushings, sagging self-leveling rear suspension (hydraulic)
📚 Vehicle History
Brand Heritage
Bmw Philosophy:
'The Ultimate Driving Machine', focus on performance, handling, and driver engagement
Model Evolution
E32 Introduction:
Launched in 1986 as a successor to the E23 7 Series, setting new standards in luxury and technology
Key Innovations E32:
First BMW with available V12 engine, advanced electronic systems, improved aerodynamics
Production
Manufacturing Location:
Dingolfing, Germany
E32 Production Years:
1986-1994
🏆 Awards & Recognition
Recognitions
Industry Acclaim:
Widely praised for its engineering, luxury, and driving dynamics upon release
Ward Automotive:
Likely received accolades as a benchmark luxury sedan of its time, though specific 'awards' might be less documented than modern vehicles

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