Segment:
Compact Executive Sedan/Coupe/Convertible
Brand Philosophy:
Ultimate Driving Machine, focus on performance, handling, and driver engagement.
Key Competitors:
Mercedes-Benz C-Class, Audi A4, Lexus IS, Infiniti G35, Acura TL.
Driving Dynamics:
Renowned for its balanced chassis, rear-wheel-drive platform, and responsive steering.
Powertrain:
Smooth inline-six engines, offering a refined power delivery.
Build Quality:
High standards of interior and exterior fit and finish, characteristic of BMW.
Engine Mechanical:
Complete overhaul, diagnosis, cylinder head, block, pistons, crankshaft, camshafts, timing systems.
Engine Management Dme:
Engine control unit (DME), fuel injection, ignition timing, sensor diagnosis (MAF, O2, crank, cam), throttle body control.
Transmission Manual:
Gearing, clutch, linkage, overhaul procedures, fluid specifications.
Transmission Automatic:
Gearbox operation, hydraulic control, torque converter, electrical controls, diagnosis, fluid specifications.
Suspension:
Front and rear suspension components, shock absorbers, springs, control arms, bushings, wheel alignment specifications.
Steering:
Power steering system, steering rack, pump, tie rods, diagnosis, repair.
Brakes:
Hydraulic system, ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), brake pads, rotors, calipers, bleeding procedures, component replacement.
Electrical System:
12V battery, charging system (alternator), starter motor, lighting, fuses, relays, wiring diagrams for all circuits.
Body And Chassis:
Body panel removal and installation, interior trim, exterior trim, doors, windows, sunroof, chassis structural components.
Climate Control HVAC:
Air conditioning system, heater core, blower motor, controls, refrigerant handling, diagnosis.
Airbags:
SRS (Supplemental Restraint System) components, sensors, control module, diagnostic procedures.
Routine Maintenance:
Oil changes, filter replacements (oil, air, cabin), spark plug replacement, fluid checks and top-offs.
Diagnostic Procedures:
Troubleshooting guides for common symptoms, fault code interpretation, component testing.
Repair Procedures:
Step-by-step instructions for component removal, installation, and repair for all major systems.
Wiring Diagrams:
Detailed electrical schematics for all vehicle systems, including lighting, power, engine controls, and accessories.
Torque Specifications:
Precise torque values for all critical fasteners during assembly and repair.
Depth:
Comprehensive, covering basic to advanced repair and diagnostics. Suitable for professional technicians and advanced DIY enthusiasts.
Transmission Type Standard:
5-speed Manual Transmission (Getrag 260/5)
Transmission Type Optional:
5-speed Steptronic Automatic Transmission (GM 5L40-E)
Rear Axle Ratio:
Typically 3.38:1 or 3.46:1 depending on market and transmission.
Manual Transmission Fluid:
BMW MTF LT-2 or equivalent (e.g., Castrol Syntrans B 75W-80)
Automatic Transmission Fluid:
BMW ATF LT-71141 or equivalent (e.g., Esso LT 71141)
NHTSA Frontal Impact Driver:
4 Stars (for E46 sedan, tested 2000)
NHTSA Frontal Impact Passenger:
4 Stars (for E46 sedan, tested 2000)
IIHS Side Impact Driver:
Good (for E46 sedan, tested 2000)
Stability Control:
Optional DSC (Dynamic Stability Control) availability.
Traction Control:
Standard ASC+T (Automatic Stability Control and Traction) on most models.
Airbags:
Frontal airbags (driver and passenger), optional side airbags.
Seatbelts:
Three-point inertia-reel seat belts with pretensioners.
Oil Change Interval:
Typically 7,500 - 10,000 miles (12,000 - 16,000 km) or as indicated by the vehicle's Condition Based Service (CBS) system.
Air Filter Replacement:
Every 30,000 miles (48,000 km) or as needed based on inspection.
Cabin Filter Replacement:
Every 15,000 - 30,000 miles (24,000 - 48,000 km) or annually.
Spark Plug Replacement:
Every 100,000 miles (160,000 km) with original equipment (e.g., NGK BKR6EQUP).
Coolant Flush:
Every 30,000 - 60,000 miles (48,000 - 96,000 km) or every 2-4 years.
Engine Oil:
BMW Longlife-01 (LL-01) approved synthetic oil, SAE 5W-30 or 0W-30.
Coolant:
BMW Blue Antifreeze/Coolant (G48 ethylene glycol based) mixed 50/50 with distilled water.
Brake Fluid:
DOT 4 (e.g., Pentosin DOT 4 LV or BMW Brake Fluid DOT 4).
Cooling System:
Plastic expansion tank leaks, water pump failure (especially plastic impeller versions), thermostat housing leaks.
Suspension:
Worn control arm bushings, front strut mounts, rear subframe bushings.
Electrical:
Window regulator failures, VANOS solenoid issues, ABS/DSC sensor failures, melted CCV valve hoses.
Engine M52Tu:
Cracked valve cover gaskets, CCV (Crankcase Ventilation) system failure leading to oil leaks and rough running.
