🏷️ Basic Information

Make:

BMW

Model:

745Li

Year:

2003

Chassis Code:

E66

Engine Code Family:

N62B44

👋 Introduction

Segment:

Full-size Luxury Sedan

Competitors:

Mercedes-Benz S-Class, Audi A8, Lexus LS, Jaguar XJ.

Luxury Appointments:

Extended wheelbase ('L'), premium materials, advanced comfort features, sophisticated design.

Technology Integration:

iDrive infotainment system, advanced driver assistance systems, sophisticated electronic controls.

Performance Focus:

BMW's characteristic driving dynamics, powerful V8 engine, refined handling.

📋 Manual Details

Primary Coverage:

Service and Repair

Estimated Pages:

Extensive, likely thousands of pages when compiled from official sources.

Type:

Digital Service and Repair Manual Software

Language:

English

Format:

Software/Digital (likely PDF or proprietary application)

📖 Manual Coverage

Engine Mechanical:

Engine assembly, cylinder head, valvetrain, crankshaft and pistons, lubrication system, cooling system, fuel system (injection), exhaust system.

Engine Electrical:

Ignition system, engine management system (DME), sensors, actuators, starter, alternator.

Transmission:

Automatic transmission (e.g., GM 5L40-E variant for this period), electronic transmission control, torque converter, shift linkage.

Drivetrain:

Drive shafts, differential, axles.

Suspension:

Front suspension (e.g., double wishbone, McPherson strut variations), rear suspension (e.g., multi-link), adaptive suspension systems (e.g., EDC - Electronic Damping Control).

Steering:

Power steering system, steering column, steering rack.

Brakes:

Hydraulic system, ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), brake discs, pads, calipers, parking brake, brake assist.

Electrical System:

Battery, charging system, lighting system (headlights, taillights, interior), wiring diagrams, fuse box locations and functions, relays, ground points.

Body And Chassis:

Body structure, panels, doors, hood, trunk lid, bumpers, glass, seals, underbody protection.

HVAC:

Heating, Ventilation, and Air Conditioning system, climate control module, compressor, condenser, evaporator, refrigerant, controls.

Infotainment:

iDrive system, radio, navigation, entertainment system, speaker system, telematics.

Comfort Features:

Power seats, windows, mirrors, sunroof, central locking, keyless entry, alarm system.

Maintenance:

Scheduled maintenance (oil changes, filter replacements, spark plugs), fluid level checks and top-offs, tire rotation and balancing, brake inspections, battery maintenance.

Diagnostics:

Troubleshooting guides, fault code retrieval and interpretation (OBD-II), symptom-based diagnostics, diagnostic tool usage (e.g., ISTA/D).

Repair Procedures:

Step-by-step instructions for component replacement, rebuilds, adjustments, and calibrations for all major systems.

Electrical Repair:

Wiring harness repair, component testing and replacement, troubleshooting electrical faults using diagrams.

Specifications And Data:

Torque specifications, clearances, fluid capacities, electrical specifications, diagnostic parameters.

Depth Level:

Comprehensive, covering basic maintenance to complete engine and transmission rebuilds, advanced electrical diagnostics, and bodywork repairs.

📊 Manual Specifications

Digital Format:

Likely PDF or proprietary diagnostic software format for interactive use and searchability.

Printability:

High-resolution images, diagrams, and text, designed for clear printing of specific sections or the entire manual.

Binding Type:

Not applicable for software format.

Paper Type:

Not applicable for software format.

⚙️ Engine Specifications

Engine Type:

Naturally Aspirated V8

Displacement:

4.4 Liters (4398 cc)

Engine Code:

N62B44

Horsepower:

329 hp @ 6100 rpm

Torque:

330 lb-ft @ 3600 rpm

Fuel Delivery:

Sequential Multi-Point Fuel Injection (SFI)

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended)

Variable Valve Timing:

VANOS (Variable Valve Timing)

Valvetrain Configuration:

DOHC (Double Overhead Camshafts), 4 valves per cylinder

Ignition System:

Distributorless Electronic Ignition (DIS) with coil-on-plug ignition.

🔧 Transmission

Transmission Type:

6-Speed Automatic Steptronic

Optional Transmission:

N/A for 745Li model year 2003

Transmission Features:

Steptronic manual shift mode, adaptive shift logic, electronic transmission control.

Transmission Fluid Type:

BMW Approved ATF (e.g., Mobil ATF LT 71141 or equivalent, check specific manual for exact part number)

Transmission Fluid Capacity:

Approximately 8.5 - 9.5 liters (check specific manual for exact capacity and fill procedure)

📐 Dimensions

Wheelbase:

124.4 inches (3160 mm)

Length:

201.0 inches (5106 mm)

Width:

73.5 inches (1867 mm)

Height:

58.1 inches (1476 mm)

Curb Weight:

Approximately 4400-4600 lbs (2000-2100 kg)

Gross Vehicle Weight Rating Gvwr:

Check specific vehicle placard, typically around 5600-5800 lbs.

Trunk Capacity:

Approximately 18.0 cubic feet (510 liters)

🛡️ Safety Features

NHTSA Front Crash Test:

5-Star (likely, as per BMW safety standards of the era)

NHTSA Side Crash Test:

5-Star (likely, as per BMW safety standards of the era)

Electronic Stability Control:

Dynamic Stability Control (DSC) including Automatic Stability Control + Traction (ASC+T).

Antilock Brakes:

Anti-lock Braking System (ABS)

Traction Control:

Traction Control System

Brake Assist:

Brake Assist system

Airbags:

Frontal airbags, side-impact airbags, front and rear head protection system (curtain airbags).

Seatbelts:

3-point inertia-reel seatbelts with pretensioners and force limiters.

Child Seat Anchors:

LATCH (Lower Anchors and Tethers for Children) system.

💡 Technology Features

Infotainment System:

iDrive system with a central controller and color LCD screen.

Audio System:

Premium sound systems, often Logic7 by Harman Kardon, with multiple speakers and subwoofer.

Adaptive Cruise Control:

Available Adaptive Cruise Control (ACC).

Parking Assist:

Available parking sensors (front and rear).

Headlight Technology:

Available Xenon adaptive headlights with automatic leveling and cleaning.

Telematics:

BMW Assist with telematics services (e.g., emergency call, remote diagnostics).

Climate Control:

Automatic multi-zone climate control with independent front and rear controls.

Seat Features:

Power-adjustable front seats with memory, lumbar support, and heating/ventilation options.

🔧 Maintenance

Oil Change Interval:

Typically every 10,000-15,000 miles or 12-24 months, depending on driving conditions (indicated by Condition Based Service - CBS system).

Brake Fluid Flush:

Every 2 years, regardless of mileage.

Engine Air Filter:

Recommended every 30,000-60,000 miles or as indicated by CBS.

Cabin Air Filter:

Recommended every 15,000-30,000 miles or annually.

Engine Oil Specification:

BMW Longlife-01 (LL-01) or BMW Longlife-04 (LL-04) compliant synthetic oil, typically 5W-30 or 0W-30. Consult manual for precise specification.

Engine Oil Capacity:

Approximately 6.5 liters (6.9 US quarts) with filter change.

Coolant Type:

BMW Blue Antifreeze/Coolant (G48 formulation or equivalent)

Power Steering Fluid:

Pentosin CHF 11S or a BMW approved equivalent.

Common Faults:

Oil leaks from valve cover gaskets and oil pan, VANOS solenoid issues, ignition coil failures, water pump failures, electronic component failures (e.g., iDrive system, door modules), cooling system leaks, ABS/DSC sensor issues.

📚 Vehicle History

Bmw Heritage:

Bayerische Motoren Werke AG, renowned for performance, luxury, and engineering excellence since its founding in 1916.

E66 Generation:

The E66 is the long-wheelbase variant of the E65 chassis, representing BMW's fifth generation of the 7 Series, introduced in 2001 (E65) and the E66 in 2002. It marked a significant design and technological departure from previous generations.

Production Years:

2002-2008 (for E66 generation)

Manufacturing Location:

Dingolfing, Germany

🏆 Awards & Recognition

Critical Acclaim:

Praised for its technological innovation, advanced features, and powerful V8 engine, although early iDrive systems received mixed reviews for usability.

Safety Awards:

Typically awarded high safety ratings by IIHS and NHTSA.