🏷️ Basic Information

Make:

BMW

Model:

3 Series

Chassis Code:

E46

Model Year:

2003

Generation Code:

E46 (Fourth Generation)

Generation Years:

1998-2006 (Global), 1999-2006 (North America)

Platform:

BMW New Generation Sedan/Coupe Platform

👋 Introduction

E46 Market Segment:

Compact executive car, a benchmark in its segment for sporty handling and premium feel.

Bmw 3 Series Legacy:

The 3 Series is BMW's best-selling model globally and is considered the archetypal sport sedan.

Key Competitors E46:

Mercedes-Benz C-Class (W203), Audi A4 (B6), Lexus IS, Acura TL.

E46 Distinctive Attributes:

Excellent chassis dynamics (often cited as one of the best handling generations), refined interior, strong engine options, rear-wheel drive bias (with xDrive AWD available).

Manual Benefit:

Empowers owners and independent mechanics with the same factory-level information used by BMW technicians, enabling accurate diagnosis, maintenance, and repair, thus saving money and ensuring vehicle longevity.

📋 Manual Details

All Models:

Yes, covers all E46 models, engines, trims, and transmissions for 2003

Estimated Page Count:

Over 2000 pages (typical for comprehensive BMW workshop manuals)

Manual Type:

Workshop Service and Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Mechanical:

Engine disassembly, assembly, overhaul, cylinder head, block, crankshaft, pistons, connecting rods, timing system, lubrication system, cooling system, fuel delivery, emissions control.

Engine Management:

Engine Control Unit (ECU) diagnostics, sensor readings, ignition system, fuel injection system, VANOS system, emissions diagnostics (OBD-II).

Transmission:

Manual and automatic transmission service, repair, overhaul, clutch, torque converter, valve body, shift solenoids, transmission control module (TCM).

Drivetrain:

Driveshafts, CV joints, differential service, limited-slip differential (LSD) information (if applicable).

Suspension:

Front and rear suspension component replacement, shock absorbers, struts, control arms, bushings, springs, alignment procedures.

Steering:

Power steering system service, rack and pinion repair, steering column, tie rods, hydraulic system.

Brakes:

Brake system overhaul, disc brakes, ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), brake fluid flush, caliper replacement, rotor replacement, pad replacement.

Electrical System:

Battery, charging system (alternator), starting system (starter), wiring diagrams, fuses, relays, lighting systems, horn.

Body And Chassis:

Body panel removal and installation, doors, hood, trunk, bumpers, interior trim, glass replacement, chassis lubrication.

HVAC:

Heating, Ventilation, and Air Conditioning (HVAC) system diagnostics, refrigerant service, blower motor, climate control unit, heater core, A/C compressor.

Interior:

Seat removal and installation, dashboard removal, instrument cluster, airbag system components, interior lighting.

Exterior:

Exterior lighting, mirrors, emblems, wiper system, sunroof operation.

Scheduled Maintenance:

Oil changes, filter replacements, spark plug replacement, fluid checks and changes, belt inspections and replacement.

Troubleshooting:

Diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides, fault code explanations.

Repair Procedures:

Step-by-step instructions for component removal, installation, and repair for all major vehicle systems.

Diagnostic Procedures:

Detailed instructions for using diagnostic tools, reading fault codes, and interpreting sensor data.

Torque Specifications:

Precise torque values for all critical fasteners.

Wiring Diagrams:

Comprehensive and clear electrical wiring diagrams for all circuits.

Special Tools:

Identification and usage instructions for specialized BMW tools required for certain repairs.

Depth Of Coverage:

Comprehensive, covering everything from basic fluid checks and adjustments to full engine and transmission rebuilds. Includes advanced diagnostics and system-specific repairs.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely text-searchable PDF, allowing for quick location of specific information.

Image Resolution:

High-resolution images, diagrams, and schematics for clarity.

Printable:

Yes, designed to be printable for workshop use.

Binding For Printed:

Not applicable for PDF, but original manuals typically use spiral-bound or case-bound for durability.

Paper Type For Printed:

Not applicable for PDF, but original manuals use high-quality, durable paper.

⚙️ Engine Specifications

320I:

2.2L M54B22 I6, 170 PS (125 kW), 210 Nm

325I/325Xi:

2.5L M54B25 I6, 184 PS (135 kW), 245 Nm

330I/330Xi:

3.0L M54B30 I6, 225 PS (165 kW), 289 Nm

M3:

3.2L S54B32 I6, 343 PS (252 kW), 365 Nm

Engine Type:

Inline-6 (I6) across most petrol variants, known for smoothness and balance.

Engine Technology:

Aluminum engine block and cylinder head, Double VANOS (Variable valve timing), sequential fuel injection, DISA intake manifold (on some variants).

Fuel Type:

Premium Unleaded Gasoline (RON 95 or higher recommended)

Fuel Delivery:

Electronic Fuel Injection (EFI) with Bosch Motronic engine management.

🔧 Transmission

Standard Transmission Options:

5-speed manual transmission (Getrag GS5-39DZ on most models, ZF S5D 320Z on others).

Optional Transmission Options:

5-speed Steptronic automatic transmission (GM A5S360R/A5S390R), SMG (Sequential Manual Gearbox) for M3 models.

Steptronic Functionality:

Allows manual gear selection via shifter or steering wheel buttons (depending on option).

Smg Features:

Electro-hydraulic clutch and gear shift actuation, offering rapid gear changes for performance driving.

📐 Dimensions

Body Styles:

Sedan (4-door), Coupe (2-door), Convertible (2-door), Touring (Wagon, 5-door), M3 variants.

Wheelbase:

Approx. 2760 mm (108.7 in) for Sedan/Coupe/Touring, 2690 mm (105.9 in) for Convertible.

Overall Length:

Varies by body style, e.g., Sedan approx. 4471 mm (176.0 in).

Curb Weight:

Starts around 1400 kg (3086 lbs) for 320i manual, up to 1650 kg (3638 lbs) for 330xi automatic or M3.

🛡️ Safety Features

NHTSA Front Impact:

5-star rating (for models tested).

IIHS Side Impact:

Good rating (for models tested).

Standard Safety Features:

ABS, Traction Control (ASC+T), front airbags, side airbags.

Optional Safety Features:

Dynamic Stability Control (DSC), Xenon headlights, front and rear curtain airbags (depending on model year and options).

Passive Safety Systems:

Reinforced chassis structure, crumple zones, seatbelt pretensioners, rollover protection system (for convertibles).

💡 Technology Features

Available Infotainment Systems:

BMW Professional Radio, Business CD Player, optional Navigation system (MKIII or MKIV), Harman Kardon audio system.

Connectivity Options:

Optional Bluetooth hands-free system, CD changer.

Driver Assistance Features:

Cruise control, parking sensors (Park Distance Control - PDC).

Control Systems:

ABS, ASC+T (Automatic Stability Control + Traction), optional DSC (Dynamic Stability Control).

Bmw Connecteddrive Precursor:

Early systems offering mobile phone integration and navigation aids.

🔧 Maintenance

Oil Change Interval:

Typically every 10,000-15,000 miles (15,000-25,000 km) or annually, as indicated by the Condition Based Service (CBS) system or manufacturer recommendation.

Inspection Ii Interval:

Around 60,000 miles (100,000 km), includes a more comprehensive check of vehicle systems.

Engine Oil:

BMW Longlife-01 (LL-01) approved synthetic oil, e.g., 5W-30 or 5W-40, depending on ambient temperature and specific engine.

Coolant:

BMW G48 Antifreeze/Coolant (Ethylene Glycol based) with rust inhibitors, mixed 50/50 with distilled water.

Brake Fluid:

DOT 4 Low Viscosity (LV) or DOT 5.1 brake fluid.

Transmission Fluid Auto:

BMW ATF LT71141 or equivalent synthetic ATF (specific to transmission type).

Transmission Fluid Manual:

Typically BMW Synchromesh Transmission Fluid or equivalent API GL-4, SAE 75W-80.

Common E46 Issues:

Cooling system failures (plastic expansion tank, water pump, thermostat housing), VANOS solenoid issues, oil leaks (valve cover gasket, oil pan gasket), subframe cracking (rear), CCV system issues (crankcase ventilation), ABS/DSC sensor failures, window regulator failures, starter motor issues, ignition coil failures.

M54 Engine Specifics:

CCV system (can cause oil consumption and rough running), oil separator failure, intake manifold runner flaps (DISA).

S54 Engine Specifics M3:

Rod bearing wear (critical issue requiring proactive inspection/replacement), VANOS system issues, throttle actuator issues.

📚 Vehicle History

Bmw Brand Philosophy:

Sheer Driving Pleasure – BMW has a long history of building driver-focused vehicles with excellent engineering.

E46 Predecessor:

E36 3 Series (1990-1999).

E46 Successor:

E90 3 Series (Sedan, 2005-2011), E91 Touring (2005-2012), E92 Coupe (2006-2013), E93 Convertible (2006-2013).

Production Period:

1998-2006.

Manufacturing Locations:

Primary manufacturing in Dingolfing, Germany. Some assembly also occurred in other global locations.

🏆 Awards & Recognition

Car And Driver 10 Best:

BMW 3 Series models frequently appeared on Car and Driver's 10Best lists during the E46's production run, acknowledging its exceptional driving dynamics.

Consumer Reports Reliability:

Varies by year and specific model; some years and engine variants received above-average reliability ratings, while others had average or below-average ratings due to specific known issues.

Epa Fuel Economy Examples:

e.g., 325i Sedan (2003) estimated EPA MPG: 18 City / 26 Highway (manual).