Positioning:
The 1990 BMW 735i (E32) represented the pinnacle of luxury and engineering in its era, competing against other high-end sedans like the Mercedes-Benz S-Class and Jaguar XJ.
Comparisons:
This manual is essential for owners seeking to maintain the sophisticated systems of a flagship German luxury sedan, a segment known for its advanced technology and high build quality.
Unique Selling Points:
Official licensing suggests accuracy and completeness, providing authorized service procedures and specifications for a highly complex vehicle.
Primary Coverage:
1990 BMW 735i (E32)
Secondary Coverage:
May include related model variants or common components across the E32 platform.
Estimated Page Count:
Likely 1000+ pages (typical for comprehensive service manuals of this era).
Type:
Service and Repair Manual Software
Format:
Software (Digital Format, likely PDF or proprietary viewer).
Powertrain:
Engine mechanical, fuel system, ignition system, exhaust system, cooling system, lubrication system.
Transmission:
Automatic transmission (likely ZF 4HP22 or similar), clutch (if manual variant existed, though unlikely for 735i in 1990), drive axles, differential.
Chassis:
Brake system (ABS, hydraulic, parking brake), suspension (front and rear), steering system, wheels and tires.
Electrical:
Engine control unit (ECU), lighting, instrumentation, power accessories (windows, locks, seats), audio system, battery, charging system, starter, wiring diagrams, fuses, relays.
Body:
Body panels, doors, windows, mirrors, interior trim, climate control system, safety restraints (airbags, seatbelts).
Maintenance:
Scheduled maintenance intervals, fluid changes, filter replacements, inspections.
Repair:
Component removal and installation, diagnostic procedures, system adjustments, torque specifications.
Troubleshooting:
Symptom-based diagnostics, fault code interpretation (if applicable), electrical circuit tracing.
Diagnostics:
Engine performance diagnostics, ABS fault finding, climate control system troubleshooting.
Depth:
Comprehensive, covering routine maintenance to major component overhauls and advanced electrical diagnostics.
Digital Format:
Software based, likely searchable text and high-resolution diagrams. File size and compatibility information would be key.
Diagram Quality:
Expected to be high resolution, clear, and accurate, crucial for understanding complex electrical schematics and mechanical assemblies.
Binding:
N/A (Software format).
Paper Quality:
N/A (Software format). However, if a print option exists, expect typical professional manual paper stock.
NHTSA Rating:
Specific ratings for 1990 models are often unavailable or dated. However, the E32 was known for its robust safety structure.
ABS:
Standard Anti-lock Braking System (ABS).
Airbags:
Driver's side airbag standard; passenger airbag optional/later addition.
Seatbelts:
Three-point seatbelts for all occupants.
Audio System:
Bavarian Motor Works offers a premium audio system, often with CD changer compatibility in later production or as an option. Seek specific manual details for unit operation and troubleshooting.
ABS:
Standard, crucial for stability during braking.
Features:
Limited by 1990 standards. Primarily focused on in-car comfort and convenience features. On-board computer (OBC) functionality is a key feature.
Oil Change Interval:
Typically 5,000 - 7,500 miles or annually, whichever comes first. Check manual for specific mileage/time.
Spark Plug Replacement:
Around 30,000 miles, depending on spark plug type (e.g., copper vs. platinum).
Coolant Flush:
Every 2-3 years or 30,000-50,000 miles.
Engine Oil:
API SG or higher, SAE 15W-40 or 10W-40. Consult manual for specific BMW approvals (e.g., BMW Longlife-98 if applicable).
Transmission Fluid:
Dexron III (or equivalent ATF).
Coolant:
Ethylene glycol-based antifreeze, typically a 50/50 mix with distilled water. BMW recommends specific coolant (e.g., BMW Blue coolant).
Engine:
Oil leaks from the oil pan gasket, valve cover gasket, and front crank seal. Potential for head gasket issues if overheated.
Cooling System:
Plastic coolant expansion tank can become brittle and crack. Water pump failures are also possible.
Electrical:
Early electronic control unit (ECU) failures, failing window regulators, issues with the central locking system, and degraded wiring insulation.
Suspension:
Wear in control arm bushings, ball joints, and rear self-leveling suspension components (if equipped).
Oil Filter:
e.g., Mann-Filter W106/1, Mahle OX 37/1D (verify exact number for M30B35).
Air Filter:
e.g., Mann-Filter C25 105/1 (verify exact number for M30B35).
Bmw Heritage:
BMW has a long-standing reputation for building driver-focused luxury vehicles with a focus on performance and engineering excellence.
E32 Introduction:
The E32 generation of the 7 Series was introduced in 1986 as the successor to the E23, representing a significant advancement in technology and design.
Production Years:
1986-1994
Model Year Updates:
The 1990 model year saw minor updates, likely including interior refinements and potential additions to standard equipment.
