Why Is My Car Making a Rattling Noise?
Rattling noises indicate one of the 30,000 or so parts in your vehicle is loose. It’s usually a nut, bolt or other fastener. First, note where the rattle is coming from:
- Under the hood;
- Underneath the vehicle;
- Inside the vehicle or trunk;
- Around the tires and wheels.
Then, determine when it occurs: When turning, stopping, accelerating or hitting a bump?
Once you know where the rattle is coming from, look for wear marks, rust stains or worn paint from loose parts rubbing against each other.
The most common causes are loose brackets, worn suspension parts, a loose exhaust system or heat shield. A rotted catalytic converter or muffler can also cause rattling.
Most rattles under the hood or inside your car are simple DIY fixes. Check the obvious places for stuff rattling around — the glove box, or under the seats. Tighten any loose fasteners. Some suspension repairs can be done at home if you have the tools; many auto parts stores rent or lend them. Leave exhaust repairs to your mechanic.
