Segment:
Premium Compact Executive Sedan/Coupe/Convertible
Target Audience:
Performance-oriented luxury car buyers, enthusiasts, professional technicians
Key Competitors:
Audi A4, Mercedes-Benz C-Class, Lexus IS, Infiniti G35/G37
Engine Performance:
Twin-turbocharged inline-six engine delivering strong horsepower and torque
Driving Dynamics:
Renowned BMW handling, rear-wheel-drive biased (xDrive available)
Luxury Appointments:
High-quality interior materials, advanced technology features for its era
Engine Mechanical:
Full engine assembly, cylinder head, block, pistons, crankshaft, camshafts, valvetrain, timing system
Engine Management:
Fuel injection, ignition, emissions control, turbocharger system, ECU diagnosis and repair
Transmission Manual:
Gearbox, clutch, driveline, differential, axle shafts
Transmission Automatic:
Automatic transmission assembly, torque converter, valve body, electronic control
Suspension:
Front and rear suspension components, struts, shocks, control arms, bushings, alignment
Steering:
Power steering system, steering rack, column, linkages
Brakes:
Brake system hydraulics, ABS, DSC, brake calipers, rotors, pads, lines, master cylinder
Electrical System:
Battery, alternator, starter, wiring diagrams, fuses, relays, lighting, body electronics
Climate Control:
HVAC system, A/C compressor, evaporator, heater core, blower motor, climate control unit
Body And Chassis:
Body panels, doors, windows, interior trim, chassis components, corrosion protection
Safety Systems:
Airbags, seatbelts, passive safety components
Maintenance:
Routine service, oil changes, filter replacements, fluid checks, spark plug replacement
Troubleshooting:
Diagnostic procedures, fault code interpretation, common problem identification and solutions
Repair:
Step-by-step repair instructions for all major mechanical and electrical components
Overhaul:
Engine and transmission overhaul procedures, complete disassembly and reassembly
Diagnostics:
Detailed diagnostic flowcharts, electrical schematics, component testing
Calibration And Adjustment:
Wheel alignment, steering angle sensor calibration, throttle body adaptation
Depth Level:
Expert (covers everything from basic maintenance to complete component rebuilds and advanced diagnostics)
Diagnostic Tools:
Mentions required diagnostic tools and procedures, implying use of BMW ISTA/D or similar
Engine Type:
3.0L Twin-Turbocharged Inline-6 Cylinder
Bore X Stroke:
84.0 mm x 89.6 mm
Compression Ratio:
10.2:1
Horsepower:
300 hp @ 5800-6000 rpm
Torque:
300 lb-ft @ 1400-5000 rpm
Fuel Delivery:
Direct Injection (High-Pressure Fuel Pump)
Fuel Type:
Premium Unleaded Gasoline (91 octane or higher recommended)
ECU Type:
Bosch DME (Digital Motor Electronics)
Turbocharger Configuration:
Sequential Twin-Turbocharging (small turbo for low-end, larger for high-end)
NHTSA Front Impact:
5-Star (for comparable models)
IIHS Front Impact:
Good (for comparable models)
Stability Control:
Dynamic Stability Control (DSC)
Traction Control:
Traction Control System (TCS)
Anti Lock Brakes:
Anti-lock Braking System (ABS)
Airbags:
Front, side, and curtain airbags
Seatbelts:
Pretensioner equipped seatbelts
Oil Change Interval:
Typically indicated by Condition Based Service (CBS) system, often around 10,000-15,000 miles or annually.
Brake Fluid Change:
Every 2 years (BMW standard).
Spark Plug Replacement:
Recommended around 60,000 miles for N54 engines, but varies based on conditions and usage.
Engine Oil Type:
BMW Longlife-01 (LL-01) or BMW Longlife-04 (LL-04) approved synthetic oil, typically 5W-30 or 0W-30.
Coolant Type:
BMW Blue Antifreeze/Coolant (G48 specification).
Brake Fluid Type:
DOT 4 High Performance brake fluid.
Transmission Fluid Manual:
GL-4 or GL-5 specification gear oil (specific viscosity to be confirmed in manual).
Transmission Fluid Automatic:
BMW ATF fluid (e.g., ETL-800 for some models, consult manual for exact spec).
High Pressure Fuel Pump Failures:
Common issue on early N54 engines, often leading to misfires and starting problems.
Turbocharger Wastegate Rattle:
Can occur due to wear in the wastegate actuators, leading to a rattling noise.
Ignition Coil And Injector Failures:
Can lead to rough running, misfires, and reduced power.
Oil Pan Gasket Leaks:
Common with age and mileage due to material degradation.
Valve Cover Gasket Leaks:
Similar to oil pan gasket, can lead to oil consumption and fouling of spark plug wells.
Brand Identity:
Bayerische Motoren Werke AG (BMW), known for performance, luxury, and engineering excellence.
E90 Generation:
The E90 generation (2006-2011) represented a significant redesign and technological update for the 3 Series.
N54 Introduction:
The N54 twin-turbocharged inline-six engine debuted in the 335i for the 2007 model year, becoming a hallmark of performance in the segment.
Production Period:
2006-2010 (as covered by the manual), with the E90 generation continuing until 2011.
