🏷️ Basic Information Identification Make: BMW Model: 3 Series Model Variant: 325i Production Years Covered: 2006, 2007, 2008, 2009, 2010 Codes Chassis Code: E90 (Sedan), E91 (Wagon/Touring), E92 (Coupe), E93 (Convertible) Engine Code: N52B25 👋 Introduction Market Position Positioning: The BMW 3 Series (E90/E91/E92/E93) represented the premium compact executive sports sedan segment, known for its driving dynamics and refined engineering. Competitive Analysis Competitors: Audi A4, Mercedes-Benz C-Class, Lexus IS, Infiniti G35/G37 Key Features Driving Dynamics: Rear-wheel drive bias, balanced chassis, responsive steering, powerful inline-6 engine (N52). Build Quality: Premium interior materials, solid construction, and a focus on driver comfort and ergonomics. Target Audience Audience: Enthusiasts, DIY mechanics, professional technicians seeking detailed repair and maintenance information. 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service and Repair Page Count Total Pages: 2520 Manual Type Type: Factory Authorized Service Manual Language Language: English Format Format: PDF (Digital Download) 📖 Manual Coverage Systems Covered Powertrain: Engine, Transmission, Drivetrain, Exhaust System Chassis: Suspension (Front & Rear), Steering System, Braking System (ABS, DSC) Electrical: Engine Management, Lighting, Body Electronics, HVAC Controls, Infotainment, SRS (Airbag) System Body: Body Panels, Doors, Seats, Interior Trim, Exterior Trim, Convertible Top Mechanism (if applicable) Procedures Included Maintenance: Scheduled Maintenance, Oil Changes, Filter Replacements, Fluid Checks and Replacements Diagnostics: Troubleshooting Guides, Diagnostic Trouble Codes (DTCs), Fault Finding Procedures Repair: Engine Rebuilds, Transmission Servicing, Suspension Component Replacement, Brake System Repairs, Electrical Component Replacement Installation: Component Installation and Replacement (e.g., starter, alternator, water pump) Technical Depth Depth: Comprehensive, from basic fluid changes to complete engine and transmission overhauls, including electrical schematics and diagnostic procedures. 📊 Manual Specifications File Format File Type: PDF Searchable Text: Yes Print Quality Resolution: High-resolution, suitable for printing individual pages or the entire manual. Binding Type Binding: Not Applicable (Digital Download) Paper Type Paper: Not Applicable (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Inline 6-Cylinder Engine Code: N52B25 Displacement: 2.5 Liters (2497 cc) Performance Horsepower: 215 hp @ 6500 RPM Torque: 185 lb-ft @ 2750 RPM Bore X Stroke: 82 mm x 78.5 mm Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) with Valvetronic and VANOS Fuel Type: Premium Unleaded Gasoline (91+ Octane Recommended) Cooling System Coolant Type: BMW Blue Antifreeze/Coolant (G48) Lubrication System Oil Capacity: 6.9 US Quarts (6.5 Liters) with filter change Recommended Oil Viscosity: SAE 0W-30 Synthetic (BMW Longlife-01 or Longlife-04 approved) 🔧 Transmission Standard Transmission Type: 6-speed Manual Transmission (Getrag GS6-37BZ) Optional Transmission Type: 6-speed Automatic Transmission (ZF 6HP19) Features Automatic Features: Steptronic (manual shifting capability) Fluid Specifications Manual Fluid: BMW Manual Transmission Fluid (MTF LT-2 or LT-3) Automatic Fluid: ZF Lifeguardfluid 6 (or equivalent) 📐 Dimensions Exterior Length: Sedan: 178.2 in (4526 mm) Width: Sedan: 69.1 in (1755 mm) Height: Sedan: 56.7 in (1441 mm) Wheelbase: Sedan: 108.7 in (2760 mm) Cargo Trunk Volume: Sedan: 12.0 cu ft (339 Liters) Weights Curb Weight: Approx. 3461 lbs (1570 kg) for Manual Sedan 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (Driver & Passenger) NHTSA Side Impact: 5-Star (Front & Rear Passengers) IIHS Top Safety Pick: Yes (for earlier models in this range) Active Features Stability Control: Dynamic Stability Control (DSC), Dynamic Traction Control (DTC) Brakes: Anti-lock Braking System (ABS), Electronic Brake-force Distribution (EBD) Passive Features Airbags: Front, Side-Impact, and Curtain Airbags (SRS) Seat Belts: Pretensioners and Force Limiters 💡 Technology Features Infotainment System Name: iDrive (1st generation, CCC Professional Media) Features: Navigation, Radio (AM/FM), CD Player, Optional Satellite Radio, Bluetooth integration (via adapter or built-in modules). Driver Assistance Features: Cruise Control, Rain Sensing Wipers, Automatic Headlights, Parking Sensors (PDC). Connectivity Options: USB/Auxiliary input (depending on option package), Bluetooth hands-free calling. 🔧 Maintenance Service Intervals Oil Change Interval: BMW Condition Based Service (CBS) system typically recommends oil changes around 10,000-15,000 miles or annually, whichever comes first. Brake Fluid Change: Every 2 years Coolant Change: Initial change at 4 years, then every 2 years thereafter. Spark Plug Replacement: Around 60,000-100,000 miles, depending on spark plug type and driving conditions. Fluid Specifications Power Steering Fluid: Pentosin CHF 11S or equivalent Brake Fluid: DOT 4 (BMW Super Blue Brake Fluid recommended) Known Issues Engine Oil Leaks: Valve cover gasket, oil filter housing gasket, oil pan gasket are common leak points. Cooling System: Water pump failure (especially electric pumps later in the model run), thermostat issues, coolant expansion tank leaks. Crankcase Ventilation System: PCV valve and hoses can clog, leading to rough idle or oil consumption. Suspension: Control arm bushings, ball joints, and sway bar links are wear items. Electrical Systems: Idrive system glitches, E90 specific issues can include stepper motor failures in HVAC, and fuel pump failures. 📚 Vehicle History Brand Heritage Heritage: BMW has a long-standing reputation for producing driver-focused luxury vehicles with exceptional performance and build quality. Model Evolution Generation: This generation (E90/E91/E92/E93) replaced the E46 3 Series, introducing more advanced technology and...