What Causes the Squeaking Sound When Starting the Vehicle?
2 Answers
The reasons for the squeaking sound when starting the vehicle are: 1. Insufficient body rigidity, causing deformation during driving, leading to friction or shaking between the door and the frame; 2. Belt slippage damaging the bearings of the generator, water pump, or power steering pump; 3. Worn transmission bearings or gears; 4. Deformed, bulging, severely worn tire treads, or insufficient tire pressure. The steps for starting a car are: 1. Check around the vehicle before getting in to ensure there are no obstacles affecting safety; 2. Fasten the seat belt after entering the car; 3. Press the brake with the left foot and the accelerator with the right foot; 4. Insert the key and turn it clockwise to power on, waiting for the vehicle's self-check; 5. Check the dashboard for any abnormal warning lights; 6. Ensure the gear is in P or N, press the brake, turn the key clockwise to start the vehicle, release the handbrake, and shift to D; 7. Turn on the left turn signal, observe the left rearview mirror and the road ahead to ensure safety, then release the foot brake and gently press the accelerator to start.
I often encounter fellow car enthusiasts asking about strange noises during startup. The squeaking sounds mostly come from three places: brake pad friction, aging suspension components, or a loose belt. New cars have a break-in period for brake pads, so squeaking is normal; for older cars, it might mean the brake pads are worn to their limit and need replacement. For the suspension area, check the lower arm ball joint and shock absorber top mount—if the rubber parts are cracked, they’ll squeak. A loose belt slipping can also cause this noise, especially noticeable during cold starts. Don’t ignore it—small issues like these can accumulate and lead to suspension failure or brake malfunction. Last time, I saw a car whose ball joint was completely worn through, and the wheel almost fell off during startup. For safety, take it to a repair shop and have them lift the car for a thorough inspection.
