Segment:
Compact Executive Sedan
Brand Perception:
Known for driving dynamics, build quality, and premium feel.
Primary Competitors:
Mercedes-Benz C-Class, Audi A4, Lexus IS300, Infiniti G35.
Driving Dynamics:
Rear-wheel drive platform, balanced chassis, praised for handling and steering feedback.
Powertrain Options:
Inline-six engines known for smoothness and refinement.
Build Quality:
High-quality interior materials and solid construction.
Value:
Provides factory-level repair and maintenance information for enthusiasts and professionals, enabling cost-effective ownership and repairs.
Engine Mechanical:
Engine overhaul, cylinder head, block, pistons, crankshaft, camshafts, valve train, lubrication system, cooling system, fuel injection system, ignition system.
Engine Management:
Engine Control Unit (ECU) diagnosis, sensor readings, actuator testing, emissions control system.
Transmission:
Manual and Automatic transmission service, clutch, torque converter, gear shifting mechanisms, transmission control module (TCM).
Drivetrain:
Driveshafts, CV joints, differential, rear axle.
Suspension:
Front and rear suspension components, shock absorbers, struts, control arms, bushings, springs, wheel alignment specifications.
Steering:
Steering rack, power steering system, steering column, wheel alignment adjustments.
Brakes:
Brake system diagnosis, hydraulic components, ABS system, brake pads, rotors, calipers, brake lines, parking brake.
Electrical System:
Battery, charging system, starter, alternator, wiring diagrams, fuses, relays, lighting systems, ignition switch, power windows, mirrors, seats.
Body And Interior:
Body panels, doors, hood, trunk lid, interior trim, seats, dashboard, HVAC system, bodywork repair, corrosion protection.
HVAC:
Heating, Ventilation, and Air Conditioning (HVAC) system diagnosis, components (compressor, condenser, evaporator), refrigerant, climate control module.
Diagnostics And Troubleshooting:
Diagnostic trouble codes (DTCs), troubleshooting flowcharts, common problems and solutions.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection and replacement.
Repair:
Step-by-step repair procedures for all major systems, component replacement, and adjustments.
Disassembly Assembly:
Detailed instructions for the complete disassembly and reassembly of the vehicle and its components.
Cleaning:
Procedures for cleaning specific components during repair or maintenance.
Reinstallation:
Proper reinstallation procedures for all components to ensure correct functionality and safety.
Depth:
Comprehensive, covering from basic maintenance to advanced diagnostics and complete rebuilds.
Audience Level:
Primarily for professional technicians, but provides adequate data for DIY mechanics.
Engine Code:
M52TU B25 (TU = Technical Update)
Engine Type:
Inline 6-cylinder, DOHC, 24 valves
Displacement:
2494 cc (2.5 Liters)
Bore X Stroke:
84.0 mm x 75.0 mm
Horsepower:
168 hp @ 5500 rpm (approx.)
Torque:
181 lb-ft @ 3500 rpm (approx.)
Fuel Delivery:
Multi-point Fuel Injection (Bosch Motronic)
Fuel Type:
Premium Unleaded Gasoline (91 octane or higher recommended)
Ignition System:
Distributorless Ignition System (DIS) with individual coil-on-plug for each cylinder.
Oil Change Interval:
Typically 7,500-10,000 miles (12,000-16,000 km) or 12 months, depending on driving conditions and oil used. Check 'Condition Based Service' (CBS) system.
Spark Plug Replacement:
Approximately 60,000 miles (96,000 km) for standard plugs. Check manual for specific recommendations based on plug type.
Coolant Flush:
Every 2-3 years or 30,000-50,000 miles (48,000-80,000 km), depending on coolant type and condition.
Engine Oil:
BMW Longlife-01 (LL-01) or equivalent SAE 0W-40 or 5W-40 synthetic oil. Capacity: Approx. 6.5 quarts (6.2 liters) with filter change.
Coolant:
BMW Blue Antifreeze/Coolant (G48 ethylene glycol based) or equivalent. Mix 50/50 with distilled water. Capacity: Approx. 7.4 quarts (7.0 liters).
Brake Fluid:
DOT 4 (BMW Super Multi-Vehicle Brake Fluid or equivalent). Flush and replace every 2 years.
Automatic Transmission Fluid:
BMW ATF LT-71141 (or equivalent approved fluid for ZF 5HP19Z transmission). Check for life-time fill or recommended change intervals in manual.
Manual Transmission Fluid:
BMW Synchromesh Transmission Fluid (MTF-LT-2) or equivalent. Capacity: Approx. 1.3 quarts (1.2 liters).
Cooling System:
Plastic expansion tank cracks, water pump failure (especially plastic impeller), thermostat housing leaks.
Oil Leaks:
Valve cover gasket, oil filter housing gasket, oil pan gasket ('Vanos' seal also prone to leaks).
Suspension:
Front control arm bushings (clamshell bushings), rear shock mounts, front sway bar links.
Electrical:
ABS/DSC module failure, window regulator failure, VANOS solenoid failure causing rough idle or poor performance.
Interior:
Headliner sagging, pixelation on the instrument cluster display, door panel adhesive failure.
Manufacturer:
Bayerische Motoren Werke AG (BMW)
Reputation:
Long history of producing premium automobiles renowned for performance, engineering, and luxury.
Predecessor:
BMW 3 Series (E36)
Successor:
BMW 3 Series (E90)
Production Period E46:
1998-2006
Manufacturing Locations:
Primarily Germany (e.g., Munich, Dingolfing), also South Africa, Thailand, Egypt, Russia, and India.
Impact:
The E46 is widely considered a benchmark for compact executive sedans in its era, praised for its driving dynamics and refined engineering.
