Market Segment:
Premium compact executive sedan/coupe/convertible.
Key Competitors:
Audi A4, Mercedes-Benz C-Class, Lexus IS, Infiniti G35/G37.
Vehicle Appeal:
Renowned for its sporty handling (BMW's 'Ultimate Driving Machine' reputation), refined interior, powerful inline-six engine, and upscale brand image.
Manual Purpose:
Provides technicians and knowledgeable DIY enthusiasts with the essential information to maintain, diagnose, and repair these specific BMW models accurately.
Engine Systems:
Engine mechanical, fuel system, ignition system, cooling system, lubrication system, exhaust system, engine management (DME).
Transmission Systems:
Manual transmission (Getrag), Automatic transmission (ZF 6HP19/21), clutch, drive shafts, differentials.
Brake Systems:
Hydraulic brake system, ABS, DSC (Dynamic Stability Control), parking brake.
Suspension Steering:
Front and rear suspension components, steering system, power steering.
Electrical Electronics:
Battery, charging system, starting system, lighting, body electronics, instrument cluster, infotainment, SRS airbag system, comfort systems.
Body Chassis:
Body panels, doors, windows, interior trim, chassis structure, heating and air conditioning (HVAC).
Maintenance Procedures:
Scheduled maintenance (oil changes, filter replacements, spark plugs), brake fluid flush, coolant flush, air filter replacement.
Diagnostic Procedures:
Troubleshooting guides for common issues, symptom-based diagnostics, reading fault codes (DTCs), using diagnostic tools.
Repair Procedures:
Step-by-step instructions for component removal, installation, and repair for all major systems.
Technical Specifications:
Torque specifications for all fasteners, fluid capacities and types, wiring diagrams, diagnostic specifications.
Engine Overhaul:
Detailed procedures for engine disassembly, inspection, rebuilding, and reassembly.
Electrical Schematics:
Comprehensive wiring diagrams for all electrical systems.
Depth Of Coverage:
Advanced diagnostics, complex repairs, component-level troubleshooting, and full rebuild procedures.
Engine Type:
Naturally Aspirated Inline 6-Cylinder
Displacement:
2996 cc (3.0 Liters)
Horsepower:
230 hp @ 6500 rpm
Torque:
200 lb-ft @ 2750-4250 rpm
Fuel Delivery:
Fuel Injection (Multi-point)
Fuel Type:
Premium Unleaded Gasoline (91 Octane Recommended)
ECU Type:
DME (Digital Motor Electronics) - e.g., MSV70, MSD80
Transmission Type Std:
6-Speed Manual (Getrag GS6-37BZ)
Transmission Type Opt:
6-Speed Automatic (ZF 6HP19/6HP21 with Steptronic)
Transmission Features:
RWD (328i) or AWD (328xi), clutch types, torque converter lock-up, shift logic.
Wheelbase:
108.7 inches (2760 mm)
Length:
Approx. 178.2 - 180.7 inches (4526 - 4590 mm) depending on body style
Width:
Approx. 70.2 - 71.5 inches (1783 - 1816 mm)
Height:
Approx. 55.7 - 57.7 inches (1415 - 1465 mm)
Curb Weight:
Approx. 3450 - 3700 lbs (1565 - 1678 kg) depending on configuration
NHTSA Ratings:
Generally rated well in its class for crashworthiness (e.g., 4-star or 5-star frontal/side impacts from NHTSA during its era).
Active Safety:
ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), DTC (Dynamic Traction Control), Run-flat tires (often standard).
Passive Safety:
Front airbags, front side-impact airbags, curtain airbags (front and rear on sedans/wagons), active front head restraints, three-point seat belts with pretensioners.
Infotainment System:
iDrive system (various iterations depending on model year and options), CD player, optional navigation system, Bluetooth connectivity, optional satellite radio.
Driver Assistance Features:
Parking sensors (PDC - Park Distance Control), optional Adaptive Xenon headlights, Cruise control. Later models may have had more advanced features depending on packages.
Connectivity Options:
Auxiliary audio input, USB ports (on later models/with specific packages), Bluetooth for phone calls.
Oil Change Interval:
Variable interval based on Condition Based Service (CBS) system, typically around 10,000-15,000 miles or 1 year. Manual will detail actual CBS reset procedures.
Spark Plug Interval:
Typically around 60,000 miles for the N52 engine, but refer to manual for specific plugs and procedures.
Brake Fluid Interval:
Every 2 years, regardless of mileage.
Engine Oil Specification:
BMW Longlife-01 (LL-01) or BMW Longlife-04 (LL-04) compliant synthetic oil, SAE 0W-30 or 5W-30 depending on climate. Manual will specify precise recommendations.
Coolant Specification:
BMW Blue Antifreeze/Coolant (G48 formulation), mixed 50/50 with distilled water.
Transmission Fluid Manual:
GL-4 or GL-5 gear oil, specific viscosity (e.g., 75W-90). Manual will list exact OEM spec and fill procedure.
Transmission Fluid Automatic:
ZF Lifeguard Fluid 6 (or equivalent approved by ZF/BMW). Manual will detail fluid type, capacity, and change procedure (often considered 'lifetime' but fluid degrades).
Brake Fluid Specification:
DOT 4 BMW Brake Fluid.
Common Problems Engine:
Oil leaks from valve cover gasket, oil filter housing gasket, eccentric shaft sensor seal. Vanos solenoid failures, ignition coil failures, fuel injector issues, water pump failures (often plastic impeller degrading).
Common Problems Cooling:
Coolant leaks from expansion tank, radiator, thermostat housing, coolant hoses. Water pump failure.
Common Problems Electrical:
Power steering pump failure (electric/hydraulic), window regulator failures, headlight condensation, battery drain issues, IBS (Intelligent Battery Sensor) faults.
Common Problems Chassis:
Subframe bushings wear, differential seal leaks, control arm bushing wear, alignment issues.
Bmw Legacy:
BMW has a long-standing reputation for producing driver-focused vehicles with advanced engineering, sporty performance, and a premium image dating back to the early 20th century.
E90 Generation:
The E90 generation replaced the E46 3 Series, marking a significant redesign with updated styling, more advanced technology, and the introduction of new engine and chassis technologies.
Production Years:
2006, 2007, 2008, 2009, 2010
Manufacturing Locations:
Primarily manufactured in Germany (e.g., Dingolfing, Munich), with some assembly in other BMW facilities worldwide.
Ward Awards:
BMW's 3.0L inline-six (N52) engine was a Ward's 10 Best Engines recipient multiple times during its tenure for its smoothness, efficiency, and power delivery.
Car And Driver Recognition:
The BMW 3 Series consistently appeared on Car and Driver's 10Best lists during this period, recognized for its driving dynamics and overall excellence.
