Segment:
Full-Size Luxury Sedan
Competitors 1992:
Mercedes-Benz S-Class (W140), Lexus LS 400 (UCF10), Cadillac DeVille
Bmw Advantage:
Sporting heritage, driver-focused dynamics, advanced engineering for its time
Vehicle Highlights:
Smooth ride, powerful inline-six engine, sophisticated interior, available long-wheelbase (iL) for enhanced rear legroom
Target Audience:
BMW Enthusiasts, Independent Repair Shops, DIY Mechanics specializing in E32 chassis
Engine:
Complete Engine Overhaul, Tuning, Fuel System, Ignition System, Emission Controls, Cooling System, Lubrication System
Transmission:
Automatic Transmission Service and Repair (e.g., ZF 4HP22 EH), Gearbox Overhaul, Fluid Servicing
Drivetrain:
Rear Axle, Driveshafts, Universal Joints, Differential Service
Suspension:
Front and Rear Suspension Systems, Shock Absorbers, Springs, Control Arms, Bushings, Wheel Alignment Specifications
Brakes:
Hydraulic Brake System, ABS (Anti-lock Braking System) Diagnostics and Repair, Brake Pad and Rotor Replacement, Bleeding Procedures
Steering:
Power Steering System, Steering Gearbox, Tie Rods, Steering Column Service
Electrical:
Complete Electrical System Schematics, Wiring Diagrams, Fuse and Relay Locations, Lighting Systems, Power Windows, Locks, Mirrors, Seat Adjustment, Climate Control Electronics, Diagnostic Trouble Codes (DTCs)
Bodywork:
Body Panel Removal and Installation, Door Mechanisms, Sunroof Operation, Interior Trim, Exterior Trim, Bumpers, Sheet Metal Repair
Climate Control:
Air Conditioning System Service, Heater Core Replacement, Blower Motor, Refrigerant Handling (with safety warnings)
Comfort Features:
Seat Heating, Power Seat Adjustment, Memory Seat Functions, Cruise Control System
Maintenance:
Oil Change, Filter Replacements, Spark Plug Service, Belt Inspection and Replacement, Fluid Level Checks and Top-offs, Tune-up Procedures
Troubleshooting:
System-Specific Diagnostic Flowcharts, Symptom-Based Troubleshooting Guides, Common Fault Identification
Repair:
Component Removal and Installation, Rebuild Procedures for Major Components (Engine, Transmission), Body Panel Repairs, Electrical Component Replacement
Diagnostics:
On-Board Diagnostics (OBD) Information (where applicable for the era), Sensor Testing, Actuator Testing, Voltage and Resistance Checks
Specifications:
Torque Specifications for all Fasteners, Clearances, Pinhole Sizes, Special Tool Requirements
Level:
Comprehensive (from basic maintenance to complete engine and transmission rebuilds)
Configuration:
3.5L Inline 6-Cylinder, SOHC
Horsepower Est:
208 hp @ 5700 rpm (approx.)
Torque Est:
225 lb-ft @ 4000 rpm (approx.)
Induction:
Bosch Motronic Fuel Injection (Sequential)
Fuel Type:
Premium Unleaded Gasoline
ECU:
Bosch Motronic M1.2 or M1.3 (depending on specific build date)
Coolant Type:
BMW Blue Antifreeze/Coolant (G48 equivalent or similar Ethylene Glycol based)
Oil Capacity Est:
6.5 Liters (6.9 US Quarts)
Oil Viscosity Recommendation:
SAE 15W-40 or 10W-40 (check specific climate and manual)
Type:
4-Speed Automatic (ZF 4HP22 EH)
Type:
5-Speed Manual (less common in US market for 735i)
Automatic Modes:
Economy (E) and Sport (S) modes
Automatic Transmission Fluid:
Dexron III (or equivalent ATF specification)
Automatic Transmission:
Approx. 1.5 Liters for torque converter refill (total capacity higher, requires specific filling procedure)
Oil Change:
Typically every 7,500 - 10,000 miles or 12 months (refer to manual for exact recommendation)
Spark Plugs:
Recommended replacement at approximately 60,000 miles (using appropriate spark plug type)
Transmission Service:
Fluid and filter change recommended every 50,000 - 60,000 miles (critical for longevity)
Coolant Flush:
Every 2-3 years or 30,000 miles
Brake Fluid:
DOT 3 or DOT 4 (refer to manual)
Power Steering Fluid:
ATF (Dexron II/III) or CHF 11S (check specific system, often ATF)
Cooling System:
Plastic coolant expansion tank can become brittle and crack; water pump seals can leak.
Electrical:
Dashboard warning lights (check engine, ABS), blower motor resistor failure, door lock actuators.
Suspension:
Front control arm bushings and ball joints wear out, leading to clunks and steering looseness.
Fuel System:
Fuel pump and accumulator can degrade over time; fuel injectors may require cleaning or replacement.
Climate Control:
Blend door actuator failure, refrigerant leaks.
Automotive Journal Reviews:
Consistently praised for its engineering, refinement, and driving dynamics by automotive publications of the era.
Owner Satisfaction:
High for build quality and performance, though maintenance costs can be a factor for older vehicles.
Manual Accuracy:
Official Factory Service Manual, ensuring accuracy and completeness of procedures and specifications.
