🏷️ Basic Information

Make:

BMW

Model:

3 Series

Model Variant:

323i

Chassis Code:

E46

Production Years Covered:

1999, 2000, 2001, 2002, 2003, 2004, 2005

Engine Code Primary:

M52TU B25

👋 Introduction

Market Segment:

Premium Compact Executive Sedan

Primary Competitors:

Mercedes-Benz C-Class, Audi A4, Lexus IS

Driving Dynamics:

Renowned for its balanced chassis, rear-wheel-drive layout, and engaging driving experience, the E46 323i offered a refined yet sporty ride.

Brand Appeal:

Embodied BMW's 'Ultimate Driving Machine' philosophy, appealing to enthusiasts and those seeking luxury and performance.

📋 Manual Details

Systems Covered:

Engine mechanical, Engine electrical, Fuel system, Cooling system, Exhaust system, Ignition system, Lubrication system, Transmission (manual and automatic), Drivetrain, Suspension, Steering, Brakes (ABS, DSC), Body electrical, Climate control, Chassis, Bodywork, Interior, Exterior, Diagnostics, Troubleshooting, Maintenance, Wiring diagrams, Specifications, Torque values, Capacities.

Procedures Included:

Routine maintenance, Scheduled maintenance, Component removal and installation, Component overhaul, Diagnostic procedures, Troubleshooting guides for common and uncommon faults, Electrical system diagnosis, Repair procedures for all major systems, Body panel replacement, Interior trim removal and installation, Fluid and filter changes, Brake system bleeding, Suspension component replacement, Steering system alignment and repair.

Technical Depth:

Comprehensive professional-level repair and service information, including detailed diagnostic flowcharts, component specifications, torque values, and step-by-step instructions suitable for both professional technicians and advanced DIY enthusiasts.

Estimated Page Count:

1000+

Manual Type:

Workshop Repair Service Manual

Language:

English

Format:

PDF Download

📊 Manual Specifications

File Format:

Searchable PDF

Print Quality:

High-resolution for clear text and diagrams

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Inline-6, DOHC, 24-valve

Engine Displacement:

2.5 Liters (2494 cc)

Horsepower Output:

184 hp @ 5800 rpm (approx.)

Torque Output:

175 lb-ft @ 3500 rpm (approx.)

Fuel Delivery:

Multi-point Fuel Injection (MPI) with VANOS (Variable Valve Timing)

Recommended Fuel:

Premium Unleaded 91 Octane

🔧 Transmission

Transmission Type Standard:

5-Speed Manual

Transmission Type Optional:

5-Speed Steptronic Automatic

Drivetrain:

Rear-Wheel Drive (RWD)

📐 Dimensions

Wheelbase:

107.4 inches (2728 mm)

Length:

177.0 inches (4496 mm)

Width:

68.5 inches (1740 mm)

Height:

55.7 inches (1415 mm)

Curb Weight:

3375 lbs (approx.)

🛡️ Safety Features

NHTSA Front Impact Driver:

5-Star

NHTSA Front Impact Passenger:

5-Star

Traction Control:

Standard (ASC+T)

Stability Control:

Optional/Available (DSC - Dynamic Stability Control)

Airbags Front:

Dual front airbags

Airbags Side:

Optional/Available front side-impact airbags

Seatbelts:

3-point inertia-reel seatbelts with pretensioners

💡 Technology Features

Infotainment System:

Optional BMW Business or Professional CD/Radio systems, with available navigation and premium audio upgrades.

Cruise Control:

Standard

Parking Assistance:

Optional rear parking sensors (Park Distance Control - PDC)

Auxiliary Input:

Optional auxiliary input for audio devices

🔧 Maintenance

Oil Change Interval:

Variable Oil Service Interval (VSI) system, typically around 7,500-15,000 miles or as indicated by the car's computer.

Brake Fluid Flush:

Every 2 years

Coolant Flush:

Every 3-4 years or 50,000 miles (using BMW blue coolant)

Engine Oil Type:

BMW Longlife-98 approved synthetic oil (e.g., Castrol Syntec 5W-30 or 5W-40)

Engine Oil Capacity:

6.5 Liters (6.9 US Quarts)

Transmission Fluid Manual:

BMW MTF-LT-1 or LT-2 (manual transmission fluid)

Transmission Fluid Automatic:

BMW ATF LT-4 (or equivalent ATF Dexron III/Mercon spec)

Coolant Type:

BMW Blue Antifreeze/Coolant (G48 specification)

Vibration Causes:

Cracked plastic valve cover with integrated PCV system, worn VANOS solenoids, failing motor mounts, driveshaft center bearing.

Cooling System Issues:

Plastic expansion tank leaks, water pump failure (often plastic impeller), thermostat housing leaks.

Electrical Issues:

ABS/DSC module failures, CCV system failure causing oil leaks, worn window regulators, headlight condensation.

Suspension Wear:

Control arm bushings, ball joints, tie rod ends, rear shock mounts.

📚 Vehicle History

Brand Focus:

BMW has a long-standing reputation for producing driver-focused, sporty, and luxurious vehicles.

E46 Introduction Year:

1998 (for model year 1999)

323I Positioning:

The 323i was positioned as a mid-range offering within the E46 lineup, providing a balance of performance and efficiency over the base 320i and below the more powerful 325i/330i models.

Manufacturing Locations:

Primarily Dingolfing, Germany; also South Africa and other contract assembly plants.

🏆 Awards & Recognition

Ward Auto Worlds 10 Best Engines:

BMW's M52 engine family (including variants like the M52TU) was frequently recognized for its smoothness, power delivery, and efficiency by WardsAuto.

Car And Driver 10Best:

The E46 3 Series platform consistently made Car and Driver's 10Best lists during its production run, acknowledging its superior handling and overall driving pleasure.