Toyota Highlander driving noise on acceleration and stereo volume control malfunction with seat adjuster issue on Toyota Highlander

Some Toyota Highlander owners report experiencing various issues, including driving noise during acceleration, stereo volume control malfunctions, and seat adjuster problems. Many owners have noted noises such as whining, grinding, buzzing, and humming when accelerating, which may vary in intensity and could be linked to components like CV axles. Additionally, some owners have encountered humming sounds from the stereo that change with engine RPM, often related to a failing alternator, and have found that unplugging the alternator can mitigate the noise. Furthermore, while not extensively documented, seat adjuster issues are reported, ranging from motorized adjustment failures to problems with manual controls. Owners experiencing these concerns are advised to seek inspection and repair from a qualified mechanic or dealership to ensure proper resolution.