Segment:
Compact Executive Sedan/Coupe. The E46 3 Series was renowned for its blend of luxury, performance, and driving dynamics, establishing BMW's dominance in its class.
Competitors:
Mercedes-Benz C-Class (W203), Audi A4 (B6), Lexus IS300, Infiniti G35.
Driving Dynamics:
Renowned for its balanced chassis, rear-wheel drive layout, and precise steering, offering a superior driving experience.
Powertrain:
The M54B30 engine provided a strong blend of power and refinement.
Build Quality:
Exceptional German engineering and build quality, contributing to its long-term desirability.
Engine:
M54B30 (3.0L Inline-6), including diagnostics, repair, and overhaul of all components (cylinder head, block, valvetrain, cooling, lubrication, fuel injection, ignition).
Transmission:
GM A5S360R (5-speed automatic) and Getrag 420G (6-speed manual) – including diagnosis, fluid service, seal replacement, and complete overhaul procedures.
Brakes:
Hydraulic system, ABS (Anti-lock Braking System), DSC (Dynamic Stability Control), pad/rotor replacement, caliper service, brake line bleeding, and hydraulic unit repair.
Suspension Steering:
Front (MacPherson strut with multi-link) and rear (multi-link) suspension, shock absorber replacement, ball joint service, wheel bearing replacement, power steering system (hydraulic pump, rack and pinion) service, and alignment specifications.
Electrical Electronic:
Detailed wiring diagrams, ECU (Engine Control Unit) functions, sensor diagnostics, alternator, starter motor, battery maintenance, lighting systems, instrument cluster, power accessories, and DME (Digital Motor Electronics) troubleshooting.
Body Chassis:
Body panel removal/installation, door mechanisms, glass replacement, interior trim, underbody protection, and chassis component torque specifications.
Heating Air Conditioning:
Climate control system operation, refrigerant handling, compressor, evaporator, condenser service, HVAC blower motor, and cabin filter replacement.
Fuel System:
Fuel pump, fuel injectors, fuel pressure regulator, evaporative emissions control (EVAP) system, and fuel tank service.
Routine Maintenance:
Oil and filter changes, air filter replacement, spark plug replacement, coolant flushes, brake fluid replacement, power steering fluid replacement, and general inspection procedures.
Diagnostic Troubleshooting:
Step-by-step troubleshooting guides for common and complex issues, symptom-based diagnostics, OBD-II (On-Board Diagnostics) code interpretation, and component testing procedures.
Major Repairs:
Engine rebuilds, transmission overhauls, suspension component replacement (e.g., control arms, struts), brake system repairs, and electrical system component replacement.
Component Replacement:
Detailed instructions for replacing virtually all major and minor components, including torque specifications and special tool requirements.
Technical Specifications Data:
Includes all necessary specifications, tolerances, capacities, and torque values for every repair and maintenance procedure.
Depth:
Expert-level detail suitable for professional mechanics and advanced DIY enthusiasts. Covers everything from basic fluid changes to full engine and transmission rebuilds, including complex electrical diagnostics.
Configuration:
3.0-liter (2979 cc) Naturally Aspirated Inline-6 Cylinder
Bore X Stroke:
84.0 mm x 89.6 mm
Compression Ratio:
10.2:1
Valve Train:
DOHC (Double Overhead Camshaft), 24 valves, Double VANOS (Variable Valve Timing for both intake and exhaust camshafts)
Horsepower:
225 hp @ 5900 rpm
Torque:
214 lb-ft (290 Nm) @ 3500 rpm
Injection Type:
Sequential Multi-Point Fuel Injection (SMPI), Bosch Motronic ME 7.2 DME
Recommended Fuel:
Premium Unleaded (91 Octane or higher)
Oil Type:
SAE 0W-40 Synthetic
Oil Capacity:
6.5 US Quarts (6.2 Liters) with filter
Type:
Getrag 420G 6-speed Manual Transmission
Type:
GM A5S360R 5-speed Steptronic Automatic Transmission
Manual Gear Ratios:
1st: 4.23:1, 2nd: 2.50:1, 3rd: 1.66:1, 4th: 1.22:1, 5th: 1.00:1, 6th: 0.85:1, Reverse: 3.91:1
Steptronic Functionality:
Allows manual selection of gears via shifter or steering wheel buttons (on some trims).
Manual Transmission Fluid:
BMW MTF LT-2 (or equivalent GL-4/GL-5 rated gear oil)
Automatic Transmission Fluid:
BMW ATF LT-4 (Dexron III H compatible)
Oil Change Interval:
BMW Condition Based Service (CBS) typically recommends every 10,000-15,000 miles or annually, depending on driving conditions. Manual will provide precise guidance.
Spark Plug Replacement:
Approximately every 60,000 miles (refer to manual for exact interval and plug type - typically Bosch FGR7DQP+ or equivalent).
Coolant Replacement:
First change at 4 years, then every 2 years thereafter. Use BMW Blue Antifreeze/Coolant.
Brake Fluid Replacement:
Every 2 years. Use DOT 4 fluid.
Power Steering Fluid:
BMW PSF-4 or Pentosin CHF 11S
Coolant Type:
BMW Blue Antifreeze/Coolant (Ethylene Glycol based, silicates)
Common Problems:
Cracked vacuum hoses, VANOS solenoid issues, coolant expansion tank failure, oil pan gasket leaks, CCV (Crankcase Ventilation) system clogging, rear subframe mounting points fatigue, cooling system leaks (water pump, thermostat housing, hoses).
Manual Assistance For Issues:
The manual provides detailed diagnostic and repair procedures for all known common issues, including troubleshooting steps and part replacement guides.