🏷️ Basic Information

Make:

BMW

Model:

325i

Year:

2005

Chassis Code:

E90 (for 325i Sedan) / E91 (for 325i Touring) / E92 (for 325i Coupe) / E93 (for 325i Convertible)

Engine Code:

N52B25

👋 Introduction

Segment:

Compact Executive Sedan/Coupe/Wagon/Convertible

Competitors 2005:

Audi A4, Mercedes-Benz C-Class, Lexus IS, Acura TL, Infiniti G35

Key Strengths Of 325I:

Driving dynamics, premium interior, brand prestige, balanced performance

Chassis Platform:

BMW E90/E91/E92/E93 platform, a significant redesign from the E46 generation

Powertrain Highlight:

Introduction of the N52 naturally aspirated inline-6 engine, known for its smooth operation and efficiency

Technological Advancements:

Improved chassis dynamics, more advanced electronics, iDrive infotainment system (optional)

📋 Manual Details

Manual Type:

Factory Service Repair Manual

Language:

English

Format:

PDF Download

Estimated Page Count:

Hundreds (typically 2000+ pages for a complete factory manual)

📖 Manual Coverage

Engine Mechanical:

Engine assembly, cylinder head, block, crankshaft, pistons, connecting rods, timing system, lubrication system, cooling system

Engine Electrical:

Ignition system, fuel injection, sensors, actuators, engine control module (DME) diagnostics and wiring diagrams

Transmission Manual:

Clutch, gearbox operation, shift mechanisms, internal components, torque specifications

Transmission Automatic:

Torque converter, valve body, gear sets, planetary gears, mechatronics, electronic control, fluid specifications

Drivetrain:

Drive shafts, CV joints, differential, rear axle assembly

Suspension:

Front and rear suspension components, struts, shocks, control arms, bushings, anti-roll bars, alignment specifications

Steering:

Power steering system, steering rack, tie rods, steering column, hydraulic pump, fluid specifications

Brakes:

Front and rear brake systems (discs, calipers, pads), ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), parking brake, hydraulic lines, bleeding procedures

Electrical System:

Battery, alternator, starter, lighting (headlights, taillights, interior), wiring harnesses, fuses, relays, body control module (BCM)

Body And Frame:

Body panels, doors, hood, trunk, roof, chassis structure, rust repair, collision repair guidelines

HVAC:

Heating, ventilation, and air conditioning system components, refrigerant handling, climate control module, blower motor, evaporator, condenser

Interior:

Seats, dashboard, trim panels, airbags, seat belts, power windows, power locks, sound insulation

Infotainment And Electronics:

Radio, navigation system, instrument cluster, onboard computer, sensors (speed, temperature, etc.)

Scheduled Maintenance:

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

Diagnostic Troubleshooting:

Fault code interpretation, systematic diagnosis of engine, transmission, chassis, and electrical issues

Component Removal And Installation:

Detailed instructions for removing and installing all major and minor vehicle components

Rebuild Procedures:

Comprehensive instructions for rebuilding engines, transmissions, and other major assemblies

Electrical Schematics:

Detailed wiring diagrams for all vehicle systems

Torque Specifications:

Precise torque values for all fasteners and bolts

Special Tool Requirements:

Identification and usage of specialized tools required for specific repairs

Depth Level:

Complete factory-level repair and diagnostic information

Diagnostics Capability:

Advanced diagnostic procedures, including symptom-based troubleshooting and component testing

Repair Scope:

Covers everything from basic fluid changes to complete engine and transmission overhauls

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely searchable text content

Printability:

Designed for printing individual pages or the entire document

Digital Binding:

N/A (Digital Download)

Digital Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Name:

N52B25

Engine Type:

Naturally Aspirated Inline 6-cylinder

Displacement:

2497 cc (2.5 Liters)

Bore X Stroke:

82.0 mm x 78.5 mm

Compression Ratio:

10.7:1

Horsepower Hp:

215 hp @ 6500 rpm

Torque Lb-Ft:

214 lb-ft @ 2750 rpm

Fuel Delivery:

Sequential Multi-Point Fuel Injection (MPI)

Fuel Type:

Premium Unleaded Gasoline (91 Octane or higher recommended)

ECU Type:

Bosch Motronic (specific variant for N52)

Valvetrain:

Double Overhead Camshafts (DOHC), 4 Valves per Cylinder, VALVETRONIC variable valve lift, VANOS variable valve timing

🔧 Transmission

Transmission Type:

6-speed Manual Transmission (e.g., GS6-37BZ)

Transmission Type:

6-speed Steptronic Automatic Transmission (e.g., GA6HP-19Z)

Steptronic Functionality:

Driver-selectable manual shifting via gear selector or steering wheel paddles (optional)

Automatic Transmission Fluid:

Dexron VI (or equivalent specification, check manual for exact PN)

Manual Transmission Fluid:

BMW MTF LT-2 (or equivalent specification, check manual for exact PN)

📐 Dimensions

Sedan Length:

Approximately 180.6 inches (4587 mm)

Sedan Width:

Approximately 70.1 inches (1781 mm)

Sedan Height:

Approximately 56.1 inches (1425 mm)

Wheelbase:

Approximately 108.7 inches (2760 mm)

Sedan Trunk Volume:

Approximately 12.0 cubic feet (340 liters)

Curb Weight:

Approximately 3373 - 3571 lbs (1530 - 1620 kg), depending on body style and options

🛡️ Safety Features

NHTSA Front Impact Driver:

5-Star

NHTSA Front Impact Passenger:

5-Star

IIHS Moderate Overlap Front:

Good

ABS:

Standard (Anti-lock Braking System)

Dsc:

Standard (Dynamic Stability Control)

Traction Control:

Standard

Airbags:

Frontal airbags for driver and passenger, front side-impact airbags, head protection system (HPS) curtain airbags (front and rear occupants)

Seat Belts:

3-point inertia-reel seat belts with pre-tensioners and force limiters

💡 Technology Features

Infotainment System:

BMW Professional Radio or optional iDrive infotainment system (CCC generation) with 6.5-inch display.

Audio Options:

CD player, optional Logic 7 premium sound system.

Parking Sensors:

Optional Park Distance Control (PDC).

Cruise Control:

Standard Cruise Control, optional Active Cruise Control (ACC) on some models.

Bluetooth:

Optional Bluetooth phone integration.

Navigation:

Optional BMW Professional Navigation System.

🔧 Maintenance

Oil Change Interval:

Variable service interval indicated by 'Condition Based Service' (CBS), typically around 10,000 - 15,000 miles or 12-24 months, depending on driving conditions.

Air Filter Replacement:

Every 30,000 - 45,000 miles or as indicated by CBS.

Cabin Filter Replacement:

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

Spark Plug Replacement:

Typically around 60,000 - 100,000 miles for iridium-tipped spark plugs (check manual for specific type and interval).

Engine Oil Type:

BMW Longlife-01 (LL-01) or BMW Longlife-04 (LL-04) synthetic oil, viscosity grade typically 0W-30 or 5W-30. Consult manual for specific approval.

Engine Oil Capacity:

Approximately 6.5 liters (6.9 US quarts).

Coolant Type:

BMW Blue Antifreeze/Coolant (G48 ethylene glycol based, or equivalent silicate-free coolant).

Brake Fluid Type:

DOT 4 BMW Super DOT 4 Brake Fluid.

Crankcase Ventilation System:

PCV valve (CCV system) can clog, leading to oil leaks, rough idle, and potential vacuum issues. Replacement is recommended as preventative maintenance.

Cooling System:

Plastic coolant expansion tank can become brittle and crack. Water pump and thermostat failures can occur.

Ignition Coils:

Coil-on-plug ignition coils can fail, leading to misfires and rough running. Regular replacement of coils and spark plugs is advisable.

Oil Pan Gasket Leaks:

Oil pan gasket and valve cover gasket leaks are common due to age and material degradation.

Oil Level Sensor:

Oil level sensor can fail, leading to incorrect readings or dash warnings.

📚 Vehicle History

Brand Identity:

BMW, Bayerische Motoren Werke AG, renowned for performance, luxury, and engineering excellence since 1916.

Generation Introduction:

The 325i model in 2005 represents the debut of the E90 generation, succeeding the popular E46 platform.

Design Philosophy:

The E90 generation marked a significant styling evolution with sharper lines and a more substantial presence, while retaining BMW's characteristic sporting appeal.

Production Period:

E90 generation produced from 2005 to 2013 (Sedan), 2006-2013 (Coupe), 2005-2013 (Touring), 2007-2013 (Convertible).

Manufacturing Locations:

Primary production in Munich, Germany, and Dingolfing, Germany. Also produced in Spartanburg, South Carolina, USA and other international facilities.

🏆 Awards & Recognition

Ward Auto 10 Best Engines:

The N52 engine (used in the 325i and 330i) was recognized by Ward's AutoWorld as one of the 10 Best Engines multiple times for its smoothness, power delivery, and efficiency.

Car And Driver 10Best:

The BMW 3 Series (E90 generation) frequently appeared on Car and Driver's 10Best lists during its production run, lauded for its driving dynamics and engineering.

Epa Fuel Economy City:

Approximately 19-21 MPG (city) for manual transmission.

Epa Fuel Economy Highway:

Approximately 27-30 MPG (highway) for manual transmission.