🏷️ Basic Information

Make:

BMW

Model:

3 Series

Year:

2005

Chassis Code:

E90 (Sedan), E91 (Wagon/Touring), E92 (Coupe - introduced later), E93 (Convertible - introduced later)

Engine Codes Covered:

N45, N46 (4-cylinder), N52, N54 (6-cylinder)

👋 Introduction

Segment:

Compact Executive / Sports Sedan and Wagon

Target Audience:

Enthusiasts, DIY mechanics, independent repair shops seeking in-depth technical information for the E90/E91 generation BMW 3 Series.

Competitors:

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

Vehicle Highlights:

Introduction of the E90 chassis, significant advancements in engine technology (Valvetronic, Double VANOS), improved chassis dynamics, modern interior design, enhanced safety features.

Benefit:

Provides the necessary technical knowledge to maintain, diagnose, and repair the 2005 BMW 3 Series efficiently and correctly, potentially saving significant costs compared to dealership service.

📋 Manual Details

Vehicle Models Covered:

BMW 3 Series Sedan (E90), Wagon/Touring (E91) for the 2005 model year. May include initial production details for Coupe (E92) and Convertible (E93) variants if released late in the year.

Estimated Page Count:

1000+

Type:

Full Service Repair Manual / Workshop Manual

Language:

English

Format:

Likely Digital (PDF/eBook), potentially printable sections.

📖 Manual Coverage

Powertrain:

Engine mechanical, lubrication, cooling, fuel injection (including Valvetronic and Double VANOS), ignition, exhaust, engine management (DME), clutch, manual transmission, automatic transmission (GM 6-speed GA6HP19Z, ZF 6HP26), differentials, driveshafts.

Chassis:

Steering (hydraulic power steering), suspension (front strut suspension, rear multi-link suspension), brakes (ABS, DSC, EBD, brake pad/disc replacement, hydraulic systems), wheels and tires.

Electrical:

Body Control Module (BCM), lighting (headlights, taillights, interior), power windows, central locking, mirrors, wipers, horn, fuse box diagrams, relay locations, diagnostic connector (OBD-II), battery, starter, alternator, basic wiring diagrams for key systems.

Comfort And Convenience:

Climate control (HVAC), seats, door mechanisms, interior trim, sunroof, audio system integration (basic troubleshooting).

Routine Maintenance:

Oil and filter changes, air filter replacement, cabin filter replacement, spark plug replacement, brake fluid flush, coolant flush, transmission fluid service, differential fluid change.

Repair And Rebuild:

Engine component replacement (e.g., water pump, thermostat, ignition coils, fuel injectors), transmission overhaul (major components), brake caliper/rotor replacement, suspension component replacement (shocks, struts, control arms), power steering pump replacement.

Troubleshooting:

Diagnostic trouble codes (DTCs) interpretation, common symptoms and causes, diagnostic procedures for major systems.

Specifications And Tolerances:

Torque specifications for critical fasteners, fluid capacities, component clearances, timing specifications.

Depth:

Comprehensive. Covers from basic fluid changes and component replacements to more in-depth repairs and troubleshooting. Includes detailed step-by-step instructions with illustrations and diagrams.

📊 Manual Specifications

Format:

Digital (PDF/eBook), optimized for searchability and digital viewing.

Quality:

High-resolution images and clear text for easy understanding. Designed for potential printing of specific sections.

Binding:

Not Applicable (Digital Format)

Paper:

Not Applicable (Digital Format)

⚙️ Engine Specifications

325I / 330I:

Naturally Aspirated Inline-6 Cylinders

325I Engine:

3.0L (2996cc) M54B30 (carry-over from previous generation) or N52B30 (introduction of new aluminum block engine with magnesium components and Valvetronic).

330I Engine:

3.0L (2996cc) N52B30 (higher output tune) or N54B30 (twin-turbocharged, introduced later).

320I Engine:

2.0L (1995cc) N46B20 Inline-4 Cylinder (primarily for European markets).

325I Horsepower:

~215 hp @ 6250 rpm (N52)

330I Horsepower:

~255 hp @ 6600 rpm (N52)

325I Torque:

~185 lb-ft @ 2750 rpm (N52)

330I Torque:

~220 lb-ft @ 2750 rpm (N52)

Injection Type:

Sequential Multi-Point Fuel Injection (MPI) with Valvetronic (on N52 engines)

Fuel Requirement:

Premium Unleaded Gasoline (91 AKI or higher recommended)

ECU:

Bosch Motronic (specific version varies by engine)

🔧 Transmission

Transmission Type Standard:

6-Speed Manual Transmission (Getrag GS6-37BG)

Transmission Type Optional:

6-Speed Steptronic Automatic Transmission (GM GA6HP19Z for 325i, ZF 6HP26 for 330i)

Clutch Type:

Hydraulically actuated single-plate dry clutch (manual).

Automatic Features:

Steptronic manual shifting mode, adaptive shift programs.

Manual Transmission Fluid:

BMW recommends specific manual transmission fluid, often a high-quality synthetic gear oil meeting API GL-4 standards (e.g., Pentosin MTF LT-2).

Automatic Transmission Fluid:

BMW LT-4 / Lifeguardfluid 6 (ZF spec), often Dexron VI compatible for newer variants.

📐 Dimensions

Sedan Length:

Approx. 178.2 inches (4527 mm)

Sedan Width:

Approx. 68.7 inches (1746 mm)

Sedan Height:

Approx. 56.1 inches (1425 mm)

Wheelbase:

Approx. 108.7 inches (2760 mm)

Front Headroom:

Approx. 38.8 inches (985 mm)

Rear Legroom:

Approx. 34.4 inches (874 mm)

Trunk Volume Sedan:

Approx. 12.0 cu ft (340 L)

Curb Weight Sedan 325I:

Approx. 3362 lbs (1525 kg)

Curb Weight Sedan 330I:

Approx. 3395 lbs (1540 kg)

🛡️ Safety Features

NHTSA Front Crash Test:

5-Star (Driver), 4-Star (Passenger)

IIHS Front Offset Crash Test:

Good

Stability Control:

Dynamic Stability Control (DSC) with Dynamic Traction Control (DTC) standard.

Braking Systems:

Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD), Brake Assist.

Airbags:

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

Seat Belts:

Three-point inertia-reel seat belts with front belt pretensioners and force limiters.

💡 Technology Features

I Drive System:

Introduction of BMW's iDrive infotainment system, controlled via a central console-mounted dial and screen. Can include navigation, audio, climate, and vehicle settings.

Audio Options:

Standard CD player with FM/AM radio, optional premium sound systems (e.g., Harman Kardon), optional satellite radio.

Cruise Control:

Standard cruise control, optional Active Cruise Control (ACC) on some higher-spec models.

Parking Assistance:

Optional rear parking sensors (Park Distance Control - PDC).

Bluetooth:

Optional Bluetooth hands-free connectivity for mobile phones.

Headlights:

Standard Halogen headlights, optional Xenon Adaptive Headlights with automatic leveling and headlight washers.

🔧 Maintenance

Oil Change Interval:

Variable Service Interval Indicator (CBS) system, typically between 10,000-15,000 miles or 12-24 months, depending on driving conditions. Check Oil light for precise timing.

Brake Fluid Change:

Every 2 years, regardless of mileage. The CBS system will often indicate this service.

Spark Plug Replacement:

Typically around 60,000-100,000 miles, depending on engine variant and plug type. N52 engines often use long-life iridium plugs.

Engine Oil Specification:

BMW Longlife-01 (LL-01) or BMW Longlife-04 (LL-04) approved synthetic oil, typically 5W-30 or 0W-30 depending on climate. Always confirm with owner's manual or oil cap.

Coolant Type:

BMW Blue Antifreeze/Coolant (G48 ethylene glycol based) or equivalent, mixed 50/50 with distilled water.

Engine Oil Capacity 325I N52:

Approx. 6.5 US quarts (6.2 L)

Engine Oil Capacity 330I N52:

Approx. 6.5 US quarts (6.2 L)

Cooling System:

Plastic coolant expansion tanks are prone to cracking, leading to leaks. Water pump failure (especially electric pumps on later N52 variants) and thermostat issues are also common.

Oil Leaks:

Valve cover gasket, oil filter housing gasket, and oil pan gasket can leak due to age and material degradation. Crankshaft seals can also fail.

Valvetronic System:

Eccentric shaft sensor failure or worn intermediate levers can cause rough idling, misfires, and check engine lights on N52 engines.

Ignition System:

Ignition coils and spark plug boots can fail, leading to misfires and reduced engine performance.

Power Steering:

Hydraulic power steering fluid leaks from hoses or the steering rack are possible. "Whining" noise from the pump can indicate low fluid or an impending failure.

Oil Filter Part Number Example:

Mann-Filter HU 832 or equivalent OEM P/N 11 42 7 531 230

Cabin Air Filter Part Number Example:

Mann-Filter CU 2534 or equivalent OEM P/N 64 11 3 421 201

📚 Vehicle History

Bmw Legacy:

BMW, a German manufacturer, has a long-standing reputation for building sporty, engaging, and high-quality luxury vehicles, particularly known for its 'Ultimate Driving Machine' ethos.

E46 To E90 Transition:

The 2005 model year marks the introduction of the fifth generation 3 Series (E90/E91), replacing the highly successful E46 generation. This generation saw significant advancements in technology and design.

Manufacturing Locations:

Primarily manufactured in Germany (e.g., Munich, Dingolfing) and also in South Africa.

🏆 Awards & Recognition

Car And Driver 10Best:

The 3 Series (including the E90 generation) has consistently been a recipient of Car and Driver's 10Best awards for its driving dynamics and overall excellence.

Motor Trend Car Of The Year:

While not specifically for 2005, the 3 Series line has been recognized by MotorTrend in various forms over its history.

Jd Power Dependability:

While BMW's overall dependability ratings can vary, specific models of the 3 Series often receive good marks in their segments for quality and performance.