Toyota Sienna rear wheel bearing failure, common issue with high replacement frequency on Toyota Sienna

Some Toyota Sienna owners report experiencing rear wheel bearing issues, often necessitating frequent replacements. These problems are frequently attributed to clogged differential vents, which can force oil past the wheel seal and into the bearing, washing out the grease and leading to failure. Additionally, many owners notice symptoms such as loud rumbling noises, particularly at higher speeds, which can indicate underlying wheel bearing issues. Furthermore, sliding door problems have been a recurring concern for Sienna owners since the vehicle's first generation. These insights highlight the importance of addressing these issues promptly to avoid further complications.