Market Segment:
Full-size luxury sedan
Target Audience:
Affluent buyers seeking refinement, performance, and advanced engineering
Primary Competitors:
Mercedes-Benz S-Class, Lexus LS, Audi V8 Quattro, Jaguar XJ
Design Philosophy:
Elegant styling, advanced technology, driver-focused ergonomics, supreme comfort
Long Wheelbase Option:
Available 'iL' variants offered increased rear legroom, catering to chauffeur-driven markets
Engine Options:
Introduction of V8 and V12 engines demonstrated BMW's commitment to luxury performance
Engine Mechanical:
Complete overhaul procedures, cylinder head, block assembly, crankshaft, pistons, connecting rods, lubrication system, cooling system
Engine Management:
Fuel injection (Bosch Motronic systems), ignition system, emissions control, diagnostic trouble codes (DTCs)
Transmission Automatic:
ZF 4HP22 (735i) and ZF 5HP30 (740i, 750iL) repair, overhaul, valve body, torque converter, fluid specifications
Transmission Manual:
If applicable to certain markets/configurations (less common for E32), detailed repair and adjustment procedures
Drivetrain:
Driveshafts, universal joints, rear axle assembly, differential, wheel bearings
Suspension:
Front and rear suspension, strut replacement, control arms, bushings, springs, shock absorbers, self-leveling rear suspension (if equipped)
Steering:
Power steering system, steering rack, steering column, alignment specifications
Brakes:
Hydraulic system, ABS (Anti-lock Braking System), brake discs, pads, calipers, hydraulic lines, parking brake, bleeding procedures
Electrical System:
Battery, charging system, starter motor, lighting, wiring diagrams, fuses, relays, circuit protection
Body And Chassis:
Body panel repair, chassis specifications, doors, hood, trunk lid, bumpers, glass replacement, rust prevention
HVAC:
Heating, ventilation, and air conditioning system components, refrigerant handling, climate control module diagnostics
Interior Trim:
Seat removal and installation, dashboard components, door panels, headliner, carpets
Safety Systems:
Seat belts, airbags (if applicable), SRS system diagnostics
Maintenance Procedures:
Oil changes, filter replacements, spark plug replacement, coolant flushes, brake fluid changes, belt inspections/replacements
Diagnostic Procedures:
Step-by-step troubleshooting guides for common and complex issues, diagnostic codes interpretation, testing electrical components
Repair Procedures:
Detailed, step-by-step instructions for component removal, installation, and repair of all major vehicle systems
Overhaul Procedures:
Complete engine and transmission rebuild instructions with torque specifications and critical clearances
Technical Data And Specifications:
Torque values, clearances, fluid capacities, resistance values, voltage checks, wiring diagrams
Special Tool Requirements:
Identification and use of specialized BMW tools required for certain repair procedures
Depth Of Information:
Comprehensive from basic maintenance to complete engine and transmission overhauls, including advanced diagnostics and electrical troubleshooting
Standard Transmission 735I:
4-speed automatic (ZF 4HP22)
Standard Transmission 740I:
5-speed automatic (ZF 5HP30)
Standard Transmission 750Il:
4-speed automatic (ZF 4HP24) initially, later 5-speed automatic (ZF 5HP30)
Optional Transmission Availability:
Manual transmissions were rare and primarily for European markets; automatic was dominant
Transmission Features:
Sport mode, electronic control, adaptive shift programs
Exterior Standard Wheelbase
Length Standard Wheelbase:
Approx. 4970 mm (195.7 in)
Length Long Wheelbase:
Approx. 5070 mm (199.6 in)
Wheelbase Standard:
Approx. 2830 mm (111.4 in)
Wheelbase Long:
Approx. 2930 mm (115.4 in)
Rear Legroom Enhancement Il:
+10 cm (3.9 in) compared to standard wheelbase
Curb Weight Range:
Approx. 1750 - 2050 kg (3858 - 4519 lbs) depending on engine and options
Infotainment System Era:
Period-appropriate for the late 80s/early 90s, typically a high-fidelity stereo system with cassette, optional CD player, and analog or early digital displays.
Climate Control:
Automatic climate control with multi-zone capabilities was a hallmark of the E32
Driver Assistance Features:
ABS, optional traction control (ASC), cruise control
Connectivity Features:
Limited by era; typically focused on vehicle-to-driver communication via onboard computer (Check Control) and audio system inputs.
Advanced Features For Era:
HID headlights (optional), power-adjustable seats with memory, heated seats, onboard trip computer (Check Control system)
Oil Change Interval:
Typically every 15,000 km (9,300 miles) or 12 months, whichever comes first (may vary with specific oil and driving conditions)
Transmission Fluid Interval:
BMW initially stated 'filled for life,' but modern consensus recommends fluid and filter changes every 60,000-100,000 km (37,000-60,000 miles)
Coolant Replacement:
Every 2 years or 40,000 km (25,000 miles)
Engine Oil Specification:
API SG/SH, ACEA A2/A3. Viscosity: 5W-30, 5W-40, 10W-40 depending on climate. Consult manual for exact OEM recommendation (e.g., Castrol GTX)
Transmission Fluid Type:
ZF 4HP22/24: Esso LT 71141 or equivalent. ZF 5HP30: Esso LT 71141 or equivalent.
Coolant Type:
BMW Blue (Glysantin G05 or similar ethylene glycol-based coolant)
Common Issues M30 Engine:
Oil leaks from valve cover and oil pan gaskets, coolant leaks from hoses and the water pump, idle control valve issues
Common Issues M60 Engine:
Nikasil cylinder liner wear (pre-1994 models), timing chain guide wear, oil separator (crankcase ventilation) issues
Common Issues M70 Engine:
Dual EML (Engine Management Light) system issues, idle control issues, ignition coil failures, starter motor failures (often the pre-starter solenoid)
Common Issues Electrical:
HVAC blower motor resistor failures, ABS/ASC sensor issues, headlight leveling system faults, door lock actuator failures
Common Issues Suspension:
Worn control arm bushings, sagging front springs, leaking self-leveling rear suspension accumulators/shocks
