Vehicle Class:
Compact Executive Sedan/Wagon
Target Audience:
Enthusiasts, DIY mechanics, professional repair shops
Key Competitors:
Mercedes-Benz C-Class, Audi A4, Lexus IS, Infiniti G35
Drivetrain Highlight:
xDrive All-Wheel Drive system providing enhanced traction and stability.
Engine Highlight:
Smooth and powerful M54B30 inline-six engine.
Handling Reputation:
Renowned for its balanced chassis and engaging driving dynamics.
Engine Mechanical:
Complete overhaul, rebuild procedures, component diagnostics, timing, valve adjustments, cooling system, lubrication system.
Engine Electrical:
ECU diagnostics, sensor testing, ignition system, fuel injection system, emissions control system (OBD-II).
Transmission Manual:
Clutch replacement, gearbox overhaul, shift mechanism, fluid service.
Transmission Automatic:
ZF 5HP19 (or similar) rebuild, electronic controls, torque converter, fluid service, hydraulic system diagnostics.
Drivetrain AWD:
xDrive system components, transfer case, front/rear differentials, driveshafts, CV joints, troubleshooting.
Suspension:
Front strut assembly, rear multi-link suspension, control arms, bushings, wheel bearings, alignment procedures.
Steering:
Power steering system, steering rack, tie rods, pump replacement, fluid service, diagnostics.
Brakes:
ABS system, DSC (Dynamic Stability Control), brake fluid service, pad/rotor replacement, caliper rebuild, hydraulic system bleeding.
Body Exterior:
Panel removal/installation (doors, hood, trunk), bumper repair, trim pieces, sunroof, glass replacement.
Body Interior:
Dashboard removal, seat removal/installation, door panel removal, headliner, carpet.
Electrical System:
Wiring diagrams, fuse box locations, relay functions, lighting systems, power windows, locks, mirrors, horn, wipers.
Climate Control:
HVAC system diagnostics, blower motor, evaporator, condenser, refrigerant recharge, cabin air filter.
Safety Systems:
Airbag system diagnostics, SRS module, seatbelt mechanisms.
Scheduled Maintenance:
Oil changes, filter replacements, fluid flushes, spark plug replacement, belt inspection/replacement.
Troubleshooting Guides:
Diagnostic flowcharts for common issues, fault code interpretation.
Repair Procedures:
Step-by-step instructions for component removal, installation, and adjustment.
Component Diagnostics:
Testing procedures for sensors, actuators, modules, and electrical components.
Torque Specifications:
Precise torque values for all critical fasteners.
Wiring Diagrams:
Detailed electrical schematics for various systems.
Depth Level:
Comprehensive (from basic maintenance to complete engine/transmission rebuilds)
Diagnostic Capabilities:
Advanced diagnostic procedures, including ECU adaptation and programming (where applicable).
NHTSA Front Impact Driver:
Good (for comparable E46 sedans)
NHTSA Front Impact Passenger:
Good (for comparable E46 sedans)
IIHS Frontal Offset:
Good (for comparable E46 sedans)
Stability Control:
Dynamic Stability Control (DSC)
Traction Control:
Automatic Stability Control and Traction (ASC+T)
Airbags:
Frontal airbags, side airbags, available head protection airbags (curtain airbags).
Oil Change Interval:
BMW Condition Based Service (CBS) system, typically every 10,000-15,000 miles or annually.
Spark Plug Replacement:
Approximately every 60,000 miles (depending on specific plugs and driving conditions).
Coolant Flush:
Every 2-3 years or 30,000-45,000 miles.
Engine Oil Type:
BMW Longlife-01 (LL-01) compliant synthetic oil, typically 0W-40 or 5W-30.
Engine Oil Capacity:
6.5 quarts (with filter change)
Coolant Type:
BMW Blue Coolant (G48 or equivalent ethylene glycol-based antifreeze)
Brake Fluid Type:
DOT 4 High Performance
Transmission Fluid Automatic:
ZF LifeguardFluid8 (or specified equivalent)
Ccv System:
Crankcase Ventilation (CCV) system failure can lead to oil leaks and rough running.
Cooling System:
Plastic coolant expansion tank and water pump can become brittle and fail.
Oil Pan Gasket:
Oil pan gasket leaks are common due to age and heat.
Suspension Bushings:
Control arm bushings and subframe bushings can wear out, affecting handling and ride quality.
Window Regulators:
Window regulator failures are a relatively common issue.
