Market Position:
The BMW 7 Series (E32) represented BMW's flagship luxury sedan, competing directly with high-end offerings from Mercedes-Benz (W126/W140 S-Class) and Jaguar. It was positioned as a technologically advanced, driver-focused luxury vehicle with a strong emphasis on engineering and performance.
Competitive Analysis:
Competed against the Mercedes-Benz W126 S-Class (early years) and W140 S-Class (later years), Jaguar XJ, and Lexus LS 400. The E32 735i offered a blend of sporty handling, powerful inline-six engines, and sophisticated design, differentiating it from some more comfort-oriented rivals.
Key Features:
Iconic BMW inline-six engine, luxurious interior, advanced (for its era) technology features like ABS, traction control (ASC), and optional electronic damper control (EDC), excellent chassis dynamics, spacious interior (especially the iL long-wheelbase variant).
Systems Covered:
Engine (M30B35), Drivetrain (Transmission, Differential), Suspension, Steering, Brakes, Electrical Systems (Wiring Diagrams, ECUs), Fuel System, Cooling System, Exhaust System, HVAC, Bodywork, Chassis, Interior components, Diagnostic procedures, Maintenance schedules.
Procedures Included:
Routine maintenance, scheduled servicing, troubleshooting common faults, component diagnosis, detailed repair procedures for all major systems, engine overhaul, transmission repair, brake servicing, electrical system repair, body panel replacement, diagnostic code interpretation, wiring harness repair.
Technical Depth:
Expert-level; covers everything from basic fluid changes and inspections to complete engine and transmission rebuilds, advanced electrical diagnostics, and chassis alignment.
Diagnostic Coverage:
Detailed troubleshooting guides for all systems, including symptom-based diagnostics, fault code interpretation (where applicable for the era's OBD), and step-by-step testing procedures for sensors, actuators, and control modules.
Bodywork Coverage:
Includes procedures for body panel alignment, repair of rust damage, dent removal, glass replacement, and trim component servicing.
Engine Type:
Naturally Aspirated, Inline 6-cylinder, SOHC (Single Overhead Camshaft)
Displacement:
3.5 Liters (3430 cc)
Horsepower Hp:
Approximately 208-211 hp (depending on market and year)
Torque Lb Ft:
Approximately 225-232 lb-ft (depending on market and year)
Fuel Delivery:
Bosch Motronic electronic fuel injection (EFI)
Engine Management System:
Bosch Motronic (various versions throughout the production run)
Ignition System:
Distributorless ignition (DIS) or distributor-based coil-on-plug systems, depending on specific Motronic version.
Block Material:
Cast Iron
Head Material:
Aluminum Alloy
Safety Ratings:
No official government crash test ratings from NHTSA or IIHS are readily available for this specific era and model. However, the E32 was built to high safety standards for its time.
Active Safety Features:
Anti-lock Braking System (ABS), Optional Automatic Stability Control (ASC) on later models, power-assisted steering.
Passive Safety Features:
Reinforced chassis, crumple zones, driver's airbag, front seatbelt pretensioners, padded interior surfaces.
Infotainment System:
Standard premium sound system with cassette player. Optional CD changer. Analog climate control displays, often with onboard computer providing trip data, fuel economy, and system checks.
Driver Assistance Features:
ABS, optional ASC (Automatic Stability Control) became more prevalent in later years. Optional EDC (Electronic Damper Control) adjustable suspension.
Connectivity Features:
Limited by era; primarily focused on internal systems. Features like power windows, power seats with memory, cruise control, and central locking were considered advanced at the time.
Oil Change Interval:
Typically every 7,500-10,000 miles or 12 months, or as indicated by the vehicle's service indicator system (check engine oil condition).
Major Service Intervals:
Significant service items (spark plugs, coolant flush, transmission fluid change) typically around 30,000-60,000 miles. Refer to manual for specific intervals.
Engine Oil Type:
API SG or higher, SAE 5W-30 or 10W-40 synthetic or semi-synthetic (consult owner's manual or specific year documentation for precise recommendations).
Coolant Type:
BMW Blue coolant or equivalent ethylene glycol based coolant (50/50 mix with distilled water).
Transmission Fluid Type Auto:
Dexron III or equivalent ATF (Automatic Transmission Fluid). Exact specification is critical; consult manual.
Power Steering Fluid Type:
BMW Power Steering Fluid or CHF 11S (check specific vehicle requirements, as some may use ATF).
Common Issues:
Cooling system leaks (radiator, hoses, water pump), head gasket issues (though the M30 is generally robust), fuel pump and injector issues, aging electrical components (window regulators, central locking, dashboard lights), suspension bushing wear, catalytic converter failure, oil leaks (valve cover gasket, oil pan gasket).
Cooling System Specifics:
Common failure points include plastic coolant expansion tanks, radiator end tanks, and water pump impellers, leading to coolant loss and potential overheating. Thermostat housing can also crack.
Air Filter Part Number Example:
Mann-Filter C 35165 or BMW 13721704926 (verify for specific model year)
Oil Filter Part Number Example:
Mann-Filter W 940/1 or BMW 11421701024 (verify for specific model year)
Spark Plug Part Number Example:
Bosch FGR7DQP+ or NGK BKR7EK (verify for specific model year, gap setting is crucial)
Brand Heritage:
BMW, known for 'The Ultimate Driving Machine,' has a long history of producing high-performance and technologically advanced vehicles, with the 7 Series serving as its pinnacle luxury offering since the 1970s.
Model Evolution:
The E32 generation succeeded the E23 7 Series and was produced from 1986 to 1994. It introduced significant technological advancements and a more aerodynamic, contemporary design. The 735i was a core model within this generation.
Production Years:
1986-1994
Manufacturing Locations:
Germany (primarily Dingolfing Plant)
Model Lineage:
E32 replaced the E23 7 Series and was succeeded by the E38 7 Series.
Recognitions:
While specific awards for the 735i are not widely documented, the E32 generation was generally praised by automotive journalists for its blend of luxury, performance, and technological innovation. It set a benchmark for the segment.
Ratings:
Consistently ranked as a top luxury sedan in its class during its production run by various automotive publications for its driving dynamics and build quality.
