
The main reasons for abnormal brake noises are as follows: 1. Running-in of a new car: The running-in of brake pads is a crucial part, and it usually takes a few hundred kilometers of driving before the brakes feel more comfortable. Newly replaced brake pads also need a running-in period to better integrate with the old disc. Initially, the brakes may feel very stiff, and it typically takes a few hundred kilometers of driving before they improve. 2. Sand particles: While driving, very small sand particles may get between the pad and the disc, sometimes causing abnormal noises due to friction. This usually does not require repair, and driving a bit more to let the small sand particles fall out is sufficient. 3. Running-in: For cars that produce abnormal noises due to incomplete running-in, driving aggressively and braking hard can help run in the brakes quickly, but this will cause more severe wear on the brake pads, effectively reducing their lifespan. Therefore, it is recommended to drive for a while longer and observe the situation, avoiding artificially forcing the wear of the brake pads. 4. Screws: Missing or damaged fixing screws on the brake disc can also cause abnormal brake noises.

I've driven quite a few XC60s and encountered situations where the brakes make a clunking noise, which can have several causes. The most common one is warped brake rotors, especially after frequent hard braking, where uneven heating causes deformation, resulting in a clunking sound when braking. Loose brake pads or aging retaining springs can also cause this, particularly after driving on bumpy roads, where the brake pads rattle inside the calipers, creating noise. Another possibility is a loose tie rod end ball joint, which connects the wheel to the chassis—once it wears out, braking can produce a clunk. Occasionally, the ABS system engaging can also cause noise, but that sound is more rhythmic. I recommend getting it checked early to avoid costly full brake system replacements due to worn rotors.

Last time during , the technician told me that the brake noise in the Volvo XC60 is mostly due to suspension issues. When the stabilizer bar bushings age and develop gaps, the body's center of gravity shifts forward during braking, compressing the gap and causing a clunking sound. It could also be due to worn wheel hub bearings, where you can feel a noticeable impact from loose rotating wheel components. If it's particularly noticeable during cold starts in winter, it's likely because the brake pads are made of a harder material, causing friction noise at low temperatures. Additionally, if a new car experiences this issue, it might be due to a loose screw during factory assembly. I recommend focusing on checking the control arm bushings, as rubber components tend to develop problems after reaching a lifespan of around 100,000 kilometers.

From my experience, you can diagnose the issue by listening to the sound location. A clunking noise from the front wheels might indicate a sticky brake caliper or seized piston preventing the brake pads from fully releasing. For rear wheel noises, inspect the electronic parking brake module—faulty electromechanical calipers on the XC60 can produce mechanical knocking sounds. Sounds occurring only during emergency braking are usually normal ABS pump operation. If the steering wheel shakes with noise, it's definitely warped brake discs needing resurfacing. Don't panic—just lift the car at the shop for half an hour to pinpoint the cause.

My friend's XC60 just had this issue resolved, and it was found to be insufficient lubrication on the brake caliper guide pins. Lack of over time can cause the pins to seize, preventing the brake pads from moving smoothly and resulting in a metallic clicking sound when lightly braking. Another possibility is a damaged wheel hub bearing, but that usually causes a continuous humming noise. Volvo's composite brake pads can also develop burrs on the edges, which can produce a clicking sound. It's rare for small stones to get stuck in the cooling slots. It's recommended to start with a thorough brake service, cleaning and lubricating the guide pins, which should solve the problem in most cases.

Having handled numerous cases of rattling noises in XC60 models, we've found that new vehicles often experience issues with brake pad installation. Some batches of brake pads have thinner backplates, leaving gaps when clamped, which causes collisions over bumps. For older vehicles, common causes include aging chassis bushings—for instance, cracked top mounts on shock absorbers may not produce noise over potholes but create a 'clunk' when braking. Turbocharged models also require inspection of engine mounts; damaged engine mounts can lead to engine displacement and associated noises during braking. The simplest method is to have a technician simulate braking conditions on a lift, which is more effective than road testing for pinpointing the source.


