Single knock when braking

This only happens once when braking in either direction. The moment I brake. When I brake there is a clunk that sounds like it’s coming from the back somewhere near the center of the car.

It is a single clunk. It doesn’t seem to affect how the car brakes or handles but I want to know what it is. I actually think its there to prevent knocking.

If you reverse and brake and then move forward and brake then I am guessing you get a slight knock - this is more that likely the brake pads showing they have a bit of play in the guides. Its not an issue and just something to expect if using non OEM brake pads. Worn suspension parts can also be a cause of a knocking sound when braking.

This will cause knocking when you brake and go over certain bumps. Shocks and springs can cause a clunking noise when braking if they are loose or broken. At times, these suspension parts can benefit from an adjustment or they may need replacing. Calipers that hold the disc brake pads in place may be out of adjustment, which will cause clunking.

Adjusting or replacing calipers is advisable if this is the case.

Question: My brakes are rubbing on the drivers side in front what could be the cause? I have a strange knock sound from the drivers side front wheel. It’s almost as if something moves forwards on hard braking and then as u drive off it goes back.

One single knock when braking. Single knock while braking. As you can see, the rubber wears out and the connector in the middle is free to wiggle and knock around.

When I changed to reverse, When I get going there is a single knock noise ? Sometimes when I set off into 1st after being in reverse, I get the same knock noise. If that is worn, it can make a clunk, but again it would tend to be one clumk per braking event and would have been present before too. If the brakes are only grabbing the disc at certain points. A single knocking noise when braking or turning can be caused by a faulty axle.

Gen II Prius at 175k miles is making a new clicking sound. Can be duplicated by lightly touching the brake pedal. This weird clicking noise comes from the drivers side when applying on the brakes. Does not happen when turning.

I have an Corolla with 117K miles (1ZZ-FE and Cmanual trans and front-wheel drive) that makes a single clunk under two conditions: When accelerating moderately from a stop after braking moderately to come to that stop. I was hoping someone could help.

I have a plate Ford Focus with 48k miles on it which sometimes makes a really loud groaning type noise when going backwards (both when rolling in free and when in reverse gear) and pressing the brakes. It never makes the noise when go. It seems to be coming from the front.

This may cause a knocking sound to be heard. If the tires have recently been replaced or rotated it is possible that the lug nuts weren’t tightened to the wheel correctly. A knocking sound may be heard if the front axle is severely worn out. This started happening a couple months ago after I had to slam on my brakes (triggering the ABS) to avoid some idiot who cut me off on the road.

I can hear it as well as feel it through the brake pedal. Anyways, about a few days ago, I have noticed an occasional clicking (or it could be a knocking noise, yes sounds more like a metallic knock that goes like "tock") noise from the front driver side wheel when pressing and depressing the brakes. It does not happen always, but it is distinct an of course causes concern.

Bent disc brake rotor. Debris in brake caliper. Disc brake pad spring displaced and touching the rotor. Dirt in between saddle rails and seatpost clamp. Loose brake caliper. I have recently had all the brake pads and discs replaced but this was a week ago and the car has just started making this noise. Scraping and grinding when you brake: Your brake pads need to be replaced because they’re now metal on metal and every time you hit the brakes you’re doing damage to your car!

It happens only occasionally, specifically when I start to brake, accelerate or sometimes when I let go of the gas. When the clunk happens, it seems to be coming from either beneath the floorboard or from the rear of the car.

You are correct, it is a single "clunk" on braking, but will also occur when making a left turn without braking.