Toyota Sienna heated seats insufficiently warm on highest setting, awaiting corporate resolution on Toyota Sienna

Some Toyota Sienna owners report experiencing issues with heated seats not getting warm enough on the highest setting, particularly noting that the driver side seat heater may fail to reach adequate temperatures while the passenger side heats more effectively. Concerns have also been raised about potential damage, such as burning holes in the passenger seat, which suggests problems with the temperature control mechanisms. Additionally, users have observed performance variations across different model years, with some newer models being perceived as too hot compared to older ones. To mitigate these issues, some owners have shared tips on adjusting driving and heating settings. In cases where the driver's heated seat is non-functional while the passenger seat operates normally, there are speculations that aftermarket installations may be involved. For those experiencing these concerns, it is advisable to contact Toyota customer service or visit a dealership for assistance and possible solutions.