What causes the low-pitched whining sound when braking at low speeds in the XT5?
4 Answers
Possible issues could be with the caliper, brake disc, or brake pads. Brake noise usually originates from the brake pads: Brake pad noise is typically caused by the scraping sound when the pads are worn down. In this case, simply replacing the brake pads will resolve the issue. Another possibility is surface aging or sharp edges on the brake pads, which can be fixed by grinding the surface and edges of the pads. Problems caused by the brake disc: This is usually due to deformation of the brake disc. When driving, the wobbling disc may scrape against the brake pads, causing noise. This can be resolved by repairing and grinding the disc to correct its roundness. Additionally, if the car has been parked for a long time, slight rust may form on the brake disc. The brake pads rubbing against this rust can also cause noise. This situation is not a major concern; simply driving safely for a while will wear off the surface rust.
I've seen many XT5 owners report abnormal noises when braking at low speeds, which is mostly a minor issue with the braking system. First, check the brake pads—if they're newly replaced, there might be a break-in period causing friction sounds. Second, uneven brake rotors can produce whining noises at low speeds due to slight warping from prolonged use. Another often-overlooked cause is insufficient lubrication of the brake caliper guide pins; if they stick, the brake pads won't retract properly and will keep rubbing against the rotors. Also, check for small stones stuck inside the wheel hub—a friend's XT5 had this issue last time. Finally, I recommend a comprehensive brake system inspection at the dealership, as safety is involved. Don't wait until the noise worsens—address it early for peace of mind.
That dull whining noise during low-speed braking is indeed quite annoying. The main suspicion is the coordination issue between the brake pads and discs, possibly caused by overly hard brake pad material or accumulated dust leading to irregular friction. Another possibility could be a deformed dust shield rubbing against rotating components and creating abnormal sounds. I recently handled a similar case where it turned out to be caused by displaced brake pad shims. Also, if it's most noticeable during cold starts, it might be due to overnight moisture causing rust on the brake discs. It's recommended to first check if the wheel bolts are properly tightened, then have a technician test the brake disc flatness, and finally consider lubricating the caliper pins. Brake issues shouldn't be taken lightly - it's advisable to address this within two weeks.
The whining sound during low-speed braking in the XT5 is mostly caused by mechanical friction. First, check for foreign objects in the braking system, as gravel stuck between the disc and pads is common. Next, inspect the brake pad wear—uneven wear can lead to abnormal noises. Also, examine the brake disc edges for step-like wear, which requires resurfacing. Another culprit could be a malfunctioning brake caliper, where stuck guide pins cause the pads to continuously contact the disc. Lastly, check the wheel bearing condition, though this is less likely. If the noise worsens after rain, try pressing the brakes several times to wear off any rust. If the issue persists, remove the wheel for inspection and address it early to avoid affecting driving quality.
