Engine (M54B30)
Complete M54 engine coverage: VANOS, cooling system, intake, exhaust, timing, ignition, fuel system, and oil system. Explore Engine →
E46 Vault
The comprehensive BMW E46 330i/Ci/xi knowledge base — maintenance guides, technical reference, part numbers, and community wisdom.
Transmission & Drivetrain
Manual and automatic transmissions, clutch, driveshaft, and differential guides. Explore Drivetrain →
Suspension & Steering
Front and rear suspension, subframe, alignment, coilovers, steering rack, and tie rods. Explore Suspension →
Brakes & Wheels
Brake service, ABS/DSC, OEM wheels, fitment guide, tire recommendations, and upgrades. Explore Brakes →
Electrical
DME, EWS, General Module, LCM, wiring, fuses, CAN-bus, OBD diagnostics, lighting, and audio. Explore Electrical →
Common Problems
21 documented failure points with symptoms, diagnosis, and repair guides. View Problems →
Maintenance & DIY
Service intervals, fluid specs, essential tools, jack points, and 11 step-by-step DIY procedures. View Maintenance →
Reference
Torque specs, fluid capacities, part numbers, fault codes, fuse charts, and abbreviations. View Reference →
Performance
Intake, exhaust, ECU tuning, forced induction, suspension, brakes, and weight reduction. View Performance →
Buying Guide
Pre-purchase inspection, pricing, ownership costs, and first steps after purchase. View Buying Guide →