Volkswagen Tiguan engine revs up and makes noise when attempting to slow down while going downhill on Volkswagen Tiguan

Some Volkswagen Tiguan owners report experiencing increased engine revving and noise when driving downhill, which occurs as the automatic transmission downshifts to a lower gear to assist with braking. This behavior is typical for automatic transmissions, as they adjust gears to enhance control and stability on inclines. The temporary rise in RPM and associated noise may be influenced by factors such as hard acceleration, engine load, and specific driving conditions. Additionally, some owners notice a whining noise that could be linked to accessories attached to the engine, which may require further diagnosis. If these noises persist or raise concerns, it is recommended to have the vehicle inspected by a qualified mechanic to ensure proper functioning.