BMW 325 325i 2004 Service Repair Workshop Manual

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🏷️ Basic Information Identification Make: BMW Model: 325i Model Year: 2004 Chassis Code: E46 Codes Engine Code: M54B25 👋 Introduction Market Position Segment: Premium Compact Executive Sedan/Coupe Competitive Analysis Competitors:...

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标签: 2004 325 325i BMW Car Cars Misc

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Description

🏷️ Basic Information

Identification

Make:

Model:

Model Year:

Chassis Code:

Codes

Engine Code:

M54B25

👋 Introduction

Market Position

Segment:

Premium Compact Executive Sedan/Coupe

Competitive Analysis

Competitors:

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

Key Features

Driving Dynamics:

Renowned for its balanced chassis, rear-wheel drive dynamics, and engaging driving experience

Quality And Refinement:

Typical BMW build quality, comfortable interior, and good noise insulation

Engine Performance:

Smooth and responsive inline-six engine

📋 Manual Details

Coverage Areas

All Major Topics:

Page Count

Estimated Pages:

1000+

Manual Type

Type:

Service Repair Workshop Manual

Language

Language:

English

Format

Format:

Digital (PDF)

📖 Manual Coverage

Systems Covered

Engine:

Full overhaul, diagnostics, component testing, removal/installation

Transmission Manual:

Repair, adjustment, fluid service, component replacement

Transmission Automatic:

Repair, adjustment, fluid service, torque converter, valve body diagnostics

Drivetrain:

Driveshaft, differential, axle shafts, wheel bearings

Suspension:

Front struts, rear shocks, control arms, bushings, springs, alignment procedures

Steering:

Power steering system, rack and pinion, steering column, tie rods

Brakes:

Front/rear disc brakes, ABS system, DSC, brake fluid service, component replacement

Electrical System:

Battery, alternator, starter, lighting, body control module, comfort systems

Engine Management:

ECU, sensors (MAF, O2, crank, cam), ignition system, fuel injection, VANOS

Cooling System:

Radiator, water pump, thermostat, coolant hoses, fan clutch

Fuel System:

Fuel pump, fuel filter, injectors, fuel pressure regulator, EVAP system

Exhaust System:

Catalytic converter, mufflers, exhaust manifold, O2 sensors

Body:

Exterior panels, doors, windows, sunroof, interior trim, HVAC system

Air Conditioning:

Refrigerant system, compressor, condenser, evaporator, climate control

Safety Systems:

Airbags, seatbelt pre-tensioners, ABS/DSC integration

Procedures Included

Routine Maintenance:

Oil change, filter replacement, fluid checks, spark plug replacement

Troubleshooting:

Diagnostic procedures, fault code interpretation, symptom-based diagnosis

Component Replacement:

Step-by-step guides for major and minor components

Rebuild Procedures:

Engine and transmission rebuilds (where applicable)

Calibration And Adjustment:

ECU calibration, sensor adjustments, timing checks

Technical Depth

Depth:

Comprehensive: from basic maintenance to advanced diagnostics and major overhauls

📊 Manual Specifications

File Format

File Type:

Searchable:

Printable:

Print Quality

Quality:

High-resolution, clear diagrams and text

Binding Type

Binding:

N/A (Digital)

Paper Type

Paper:

N/A (Digital)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Naturally Aspirated Inline 6-Cylinder

Displacement:

2.5 Liters (2494 cc)

Bore X Stroke:

82.0 mm x 78.5 mm

Compression Ratio:

10.2:1

Valve Train:

Double VANOS, DOHC, 4 valves per cylinder

Performance

Horsepower:

184 hp @ 6000 rpm

Torque:

230 Nm (170 lb-ft) @ 3500 rpm

Fuel System

Fuel Delivery:

Sequential Electronic Fuel Injection (Bosch Motronic ME9.2)

Fuel Type:

Premium Unleaded (91 Octane or higher recommended)

Emission Control:

Secondary air injection, catalytic converters, O2 sensors

🔧 Transmission

Standard

Type:

5-speed manual (Getrag GS5-39DZ)

Optional

Type:

5-speed Steptronic automatic (GM A5S325Z)

Features

Clutch Type:

Hydraulically actuated single-plate dry clutch (manual)

Automatic Features:

Sequential shift mode (Steptronic), adaptive shift logic

Fluid Specs

Manual Transmission Fluid:

BMW MTF LT-2 (or equivalent)

Automatic Transmission Fluid:

BMW ATF LT 71141 (or equivalent like Mobil ATF LT 71141)

📐 Dimensions

Exterior

Length:

175.1 inches (4448 mm)

Width:

68.7 inches (1745 mm)

Height:

55.5 inches (1410 mm)

Wheelbase:

107.4 inches (2729 mm)

Weights

Curb Weight:

Approx. 3300-3500 lbs (1497-1588 kg), depending on options

Gross Vehicle Weight Rating:

Approx. 4500 lbs (2041 kg)

Cargo

Trunk Volume:

11.1 cubic feet (314 liters)

🛡️ Safety Features

Ratings

NHTSA Front Impact:

4 Stars

NHTSA Side Impact:

4 Stars

Active Features

Stability Control:

Dynamic Stability Control (DSC) standard

Traction Control:

Automatic Stability Control and Traction (ASC+T)

Anti Lock Brakes:

Anti-lock Braking System (ABS) standard

Passive Features

Airbags:

Front airbags, side-impact airbags, optional head protection system (HPS)

Seatbelts:

Three-point inertia-reel seatbelts with pretensioners

Child Seat Anchors:

LATCH system (rear seats)

💡 Technology Features

Infotainment

Head Unit:

Standard E46 Business CD or optional Professional CD/Navigation system

Audio System:

Basic 6-speaker system, optional Harman Kardon upgrade.

Driver Assistance

Cruise Control:

Standard cruise control

Parking Assist:

Optional rear parking sensors (Park Distance Control - PDC)

Connectivity

Phone Integration:

Optional Bluetooth phone preparation with TCU module (requires adapter for modern phones)

🔧 Maintenance

Service Intervals

Oil Change:

Variable: Based on Condition Based Service (CBS) system, typically 10,000-15,000 miles or 1 year.

Air Filter Replacement:

Every 30,000-50,000 miles or as needed based on inspection.

Cabin Filter Replacement:

Every 15,000-30,000 miles or annually.

Spark Plug Replacement:

Every 60,000-100,000 miles (depending on plug type, OE typically 100k)

Brake Fluid Flush:

Every 2 years, regardless of mileage.

Fluid Specifications

Engine Oil:

BMW Longlife-01 (LL-01) synthetic 5W-30 or 0W-30

Coolant:

BMW Antifreeze/Coolant (G48 ethylene glycol based) mixed 50/50 with distilled water

Power Steering Fluid:

BMW Power Steering Fluid (or Pentosin CHF 11S)

Known Issues

Ccv System:

Crankcase Ventilation (CCV) system failure leading to oil consumption and potential vacuum leaks.

Oil Pan Gasket:

Leaking oil pan gasket is common due to age and material degradation.

Cooling System:

Plastic cooling system components (expansion tank, water pump housing, thermostat housing) are prone to cracking.

Vanos System:

VANOS solenoids and seals can fail, leading to rough idle and reduced performance.

Window Regulators:

Window regulator mechanisms are known to fail.

ABS Wheel Speed Sensors:

ABS/DSC warning lights due to failing wheel speed sensors.

📚 Vehicle History

Brand Heritage

Bmw Legacy:

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

Model Evolution

E46 Generation:

The E46 generation (1998-2006) is considered a high point for the 3 Series, praised for its styling, dynamics, and build quality.

325I Positioning:

The 325i served as a mid-range model in the E46 lineup, offering a strong balance of performance and luxury.

Production

Production Years:

2001-2005 for the E46 325i

🏆 Awards & Recognition

Recognitions

Car And Driver 10Best:

The E46 3 Series (including variants like the 325i) was frequently named to Car and Driver's 10Best lists during its production run.

Ratings

Consumer Reports:

Generally received good reliability ratings, though specific issues were noted as the cars aged.