Why does my car make a clicking noise?

A clicking noise from your car is common, and the cause depends a lot on when it happens:

1. The car won’t start and clicks

• Rapid clicking: This is often caused by a weak or dead battery, or corroded/loose battery terminals. The starter may be getting just enough power to click but not enough to crank the engine.
• A single loud click: If you turn the key or press the start button and hear one distinct click, the starter motor or starter solenoid may be failing.

2. Clicking while turning

• Rhythmic clicking or popping on sharp turns: This is a classic sign of a worn CV joint, often the outer CV joint. A torn CV boot can let grease out and dirt in, which speeds up wear.

3. Clicking or ticking while the engine is running

• Low engine oil or low oil pressure: This can cause lifters or other valvetrain parts to tick or click.
• Valvetrain wear or adjustment issues: Worn lifters, rocker arms, or valves out of adjustment can make a persistent ticking noise.
• Exhaust leak: A crack in the exhaust manifold or a blown gasket can create a sharp, rhythmic tick that may get louder under acceleration.
• Normal injector noise: On some modern engines, especially gasoline direct injection systems, a light rapid clicking can be normal during operation.

What to do next

If the clicking is new, getting louder, or accompanied by a warning light, check the oil level, battery condition, and visible belts or hoses first. If you’re not sure, a mechanic can usually narrow it down quickly based on when the noise happens.

If the exact cause isn’t obvious, it’s a good idea to have it checked soon, because some clicking noises are harmless while others point to parts that can fail or cause damage if ignored.