Posted on 8/29/2025
Pulling into your driveway and shutting off the car should be the end of the driving experience, but sometimes unusual sounds continue even after the engine is turned off. A hissing noise is one of the most common post-drive sounds drivers notice. While it can sometimes be normal, in other cases it signals a mechanical or safety concern. Knowing when a hiss is harmless and when it requires service helps you avoid stress and unexpected repairs. Harmless Causes of Hissing Not every hiss points to a problem. Some sounds occur because your vehicle is cooling down after a drive. For example, if you’ve been on the highway or in heavy traffic, the engine bay can reach high temperatures. As components like the exhaust system or radiator release heat, metal expands and contracts, creating noises that resemble hissing. Moisture can also play a role. If you&rsquo ... read more