The drivetrain of a BMW E90 (model years 2005-2012) relies on several specialized fluids to ensure optimal performance, longevity, and smooth operation. These fluids include lubricants for the engine, transmission, differential(s), transfer case (if applicable), and power steering system. Each fluid has a specific formulation designed to meet the demands of these high-performance vehicles. For example, the transmission fluid, whether for a manual or automatic gearbox, must withstand high temperatures and pressures while providing the necessary friction characteristics for smooth shifting and efficient power transfer.
Proper lubrication is essential for minimizing friction and wear within the complex mechanical components of the drivetrain. Regular maintenance, including fluid changes at recommended intervals, protects against costly repairs and extends the vehicle’s lifespan. Neglecting these fluids can lead to decreased performance, increased fuel consumption, overheating, and ultimately, catastrophic failure. Historically, BMW has engineered its vehicles for high performance, and maintaining the correct fluid levels and specifications is crucial for upholding this performance standard over the long term.
