1999 corolla left front vibration after braking.

How long does the vibration last after you release the brake pedal?

Vibration lasts less then one to two minutes.

So after you apply the brakes, a vibration occurs that lasts about a minute or two? Does it matter if the car is stopped or moving? What speed? When was the last time someone did work under the hood?

If you hold steady pressure on the brake pedal, does it slowly drop to the floor?

I had assumed that you were in the U.S. but just in case, does the car have a diesel or gas engine?

I think you said that you did not have ABS. Is this correct? (by the way, it helps if you do not cut out relevant information when responding to the post).

Hi Ray O,

I really appreciate the your effort. I'm sorry about the lack of info in the post but this is my first time posting and I welcome any questions. To answer your followup questions, the vibration sound is only heard when the car is moving and braking. For example stoping at a stop sign and moving again. It is not there after the car comes to a complete stop from braking, only when I start moving again. The sound seems to go away as I accelerate past 20 mph. No one has worked under the hood except for oil change. The brake pedal does not slowly drop to the floor when I hold steady presure. I am in the US and it is a gas engine. I do not have abs. As I said, I replaced the caliper with a remanufactured one but it didn't fix the issue. The rotor looks good on visual inspection and I don't have any vibration during braking. Brake pads are brand new too. It is not a grinding sound but strictly vibration and seems to project to the frame under the door. Any input would be most appreciated cause I can't figure it out!

Thanks

-Nick

Ray O wrote:

Nick, no offense intended, but your descriptions are terrible. You say that the vibration sound is only heard when the car is moving and braking but below, you said that you do not have any vibration when braking.

Does the sound occur when you are braking at low speeds?

Does the sound occur even if you do not have the brake pedal depressed?

Does the sound occur if you are accelerating up to about 20 MPH?

Does the sound change if you are turning?

No one has worked under

Did you measure rotor run-out when you replaced the caliper?

Did you bleed the brake system after replacing the caliper?

Did you torque the wheel lug nuts evenly in a star pattern?

The brake system was bleed and the wheel lug nuts were torqued in a start pattern. I did not measure the rotor run-out.

Nick,

I'm getting old and I respond to quite a few posts. You will get much better responses if you make sure the original post and previous responses are still visible when you post follow-ups.

You still have not provided enough information for anyone to give you anything more than a wild guess so I'll post some questions again.

At what speed does the vibration occur? Does the vibration occur when applying the brake pedal? Does the vibration occur when applying the accelerator pedal or when coasting? Who did the brake work? How many miles (kilometers) are on the car now? Did whoever performed the brake work inspect the inboard side of the rotors? Did whoever performed the brake work inspect the rubber brake lines? Does the vibration occur only when going in a straight line? Does the vibration occur only when turning? If so, turning which way?

We'll come back to rotor runout after you answer these questions.