Why is my car making a clicking noise when driving?
A worn CV joint or axle, a loose heat shield, a damaged wheel bearing, or worn suspension/brake components are the most common causes of a clicking noise while driving.
The sound and when it occurs—whether during turns, accelerating, braking, or going over bumps—help identify the likely culprit. If the noise persists, seek a professional inspection to prevent a roadside breakdown or further damage.
Common causes of a clicking noise while driving
These are the typical culprits to check first, based on how the noise presents itself on the road.
- Worn or damaged CV joints and axles: The most characteristic clicking happens when turning, especially on front‑wheel‑drive cars. A torn CV boot can leak grease and allow dirt in, accelerating wear.
- Wheel bearings with wear or play: A rhythmic clicking or humming that changes with speed or steering input can indicate a failing wheel bearing.
- Loose or damaged heat shields: A rattling or clicking noise under the car, often at specific RPMs or over bumps, is commonly from a loose heat shield near the exhaust or underbody.
- Exhaust system components or hangers: A loose exhaust pipe, flange, or hanger can produce a tapping or clicking sound, particularly as engine vibration changes load.
- Suspension or steering components: Worn or loose parts such as tie rods, sway bar links, or worn bushings can click when you go over bumps or during turns.
- Transmission or drivetrain issues: Less common, but clicking can originate from the differential or other drivetrain components, especially during acceleration or at certain speeds.
- Brake system hardware: Sometimes, loose pad shims, caliper hardware, or rotor abnormalities can cause a brief clicking when moving or braking.
These categories cover the most frequent scenarios. If you notice the noise only in one direction, or it correlates with speed, turning, or engine load, that pattern helps narrow down the cause.
CV joints and driveline
The CV (constant-velocity) joints transmit power to the wheels while allowing steering and suspension movement. A clicking sound when turning strongly suggests a failing CV joint, especially if the inner boot is torn and grease has leaked out. Replacing a CV axle or joint can be several hundred dollars, depending on the vehicle and whether you replace just the joint or the whole axle assembly. Prompt diagnosis can prevent a sudden axle failure on the road.
Heat shields and exhaust components
A loose or damaged heat shield or exhaust component often causes a light, metallic click or rattle that’s easiest to hear at certain engine speeds or when driving over rough pavement. Securing or replacing the shield is typically a straightforward, affordable fix.
Wheel bearings
Wheel bearing wear creates a rhythmic sound that usually grows louder with speed and may change as you turn. A professional check should confirm play at the wheel and determine whether replacement is needed. Replacing a wheel bearing or hub assembly is a common repair with variable cost by model and region.
Suspension and steering
Clicking from suspension or steering components often points to worn tie rods, sway bar links, or bushings. These parts affect handling and safety, so imperfect components should be inspected and replaced as needed.
Transmission and drivetrain
Drivetrain or transmission-related clicking can indicate issues beyond basic wear, such as differential problems or worn gears. These noises generally require a professional diagnostic, fluid checks, and potential repair to prevent loss of drivability.
How to diagnose and what to do next
Follow these steps to narrow down the source before visiting a shop. A systematic approach helps you describe symptoms clearly to a technician.
- Observe the noise: note when it happens (speed, RPM, turning direction, acceleration, braking) and whether it changes with engine load or road conditions.
- Check for obvious visual issues: torn CV boots, visible damage to heat shields, loose exhaust components, or obvious suspension wear.
- Test the wheels for play: with the car safely raised, check for perceptible movement in the wheel hub or bearing area.
- Inspect tires and brakes: look for uneven wear, foreign objects, or loose brake components that could cause clicking.
- Listen under the car: have a helper gently drive at low speed while you listen with a mechanic’s stethoscope or a long screwdriver (carefully, from a safe distance) to localize the source.
- Schedule a professional inspection: if the noise persists or you notice vibrations, pulling, or reduced braking performance, book a diagnostic with a qualified mechanic as soon as possible.
Diagnosing from home is helpful for context, but many clicking noises involve hidden wear in driveline or undercarriage components that require inspection with the vehicle supported safely and possibly lifted.
When to seek immediate help
Some noises warrant urgent attention to avoid breakdowns or unsafe driving. Look for these red flags:
- Noise accompanied by vibration, grinding, or loss of steering control.
- Grinding or clicking that intensifies with speed or during braking.
- A sudden, severe loss of power or the car becomes difficult to control.
- Visible fluid leaks, smoke, or a strong burning smell near the undercarriage or brakes.
If you experience any of these symptoms, stop safely and contact roadside assistance or a mechanic immediately.
Summary
Car clicking noises during drive time most often point to driveline wear (notably CV joints or axles), loose heat shields, wheel bearing issues, or suspension/brake component wear. Careful listening to when and where the sound happens—during turns, acceleration, or over bumps—helps narrow the cause. Use a structured diagnostic approach, and seek professional help if the noise persists, worsens, or is accompanied by handling problems or warning signals.
