Posted on 12/1/2025
Every car makes noise. But not all noises are normal, and some can be a warning sign of bigger problems under the hood. Whether it’s a high-pitched squeal, a grinding sound when you brake, or a mysterious rattle that shows up at every red light, strange vehicle noises can be unsettling. At Import Auto Specialists in San Diego, we’ve diagnosed thousands of unusual sounds from European and Asian vehicles since 1996. While some noises may be harmless, others could be signs of critical issues that need immediate attention. This guide will walk you through the most common types of car noises, what they might mean, and when to get them checked out by a pro. 1. Squealing When You Start the Engine What it might be: Worn or loose serpentine belt. If you hear a loud squeal right after starting your car, especially on a cold morning. It’s often due to a loose or worn serpentine belt. This belt powers several key systems, including the alternator, power steering, and ... read more