The Lexus RX 330, produced from 2004 to 2006, is generally regarded as a reliable luxury SUV. However, like any vehicle, it has its share of common problems that prospective buyers should be aware of. One prevalent issue reported by owners is related to the transmission. Some have experienced problems with erratic shifting, slipping, or harsh engagement, particularly in models from the earlier production years. Additionally, there have been complaints about oil leakage from the V6 engine's valve cover gaskets, which could lead to potential maintenance headaches and increased repair costs. Another noteworthy concern involves the vehicle's braking system, with some drivers encountering premature wear on brake pads and rotors. While these problems are not universal, potential buyers of a used Lexus RX 330, especially those from the 2004 to 2006 model years, should exercise due diligence in inspecting the vehicle's maintenance history and consider a thorough pre-purchase inspection to mitigate any potential issues.