kuma1416

I've been hesitant to ask this question because it is so mundane compared to the interesting topics on this forum, so sorry in advance. My front brakes ( I think driver side) have been squeaking since about one month after I bought may '17 C4S (it is now about 3 mos old). Doesn't happen all the time, usu when I come to a slow stop, like at a stoplight or when Im pulling into the garage. Tried washing them out, driving in reverse, no luck. Any ideas? I'd take it to the dealer, but they're 3 hrs away. Thanks in advance!

ipse dixit

1. Find an open stretch of road.

2. Accelerate to about 60-65 mph

3. Break hard (i.e., aggressively) to slow yourself to 15 mph, but not a complete stop.

4. Repeat steps 1, 2 and 3 for 8 to 10 times.

Squeaky brakes gone.

4pipes

Ah, the old bed the brakes routine.

LTP

I did about 6 times, is that not enough? noise still there

4pipes

Probably not. You have to really brake aggressively and avoid lockup or ABS initializing.

GTSMeister

Advice is good, you have to get the brakes really hot. Also then you have to let them come down to temp slowly so make sure you are set up to drive 15 minutes without using the brakes and if you have to use them do not allow a complete stop.

Bedding in the brakes removes the glaze (builds up from conservative braking action) and transfers pad material to the rotor to get a better level of friction and braking action. It does help with squeaking (if it is a result of glaze) but may not eliminate it.

The next thing you can do is make sure the pads are chamfered. The leading edge can be filed away at an angle so that the angle of pad contact to rotor is not 90 degrees. That will reduce squeak. Most pads are chamfered, perhaps yours had been replaced with non chamfered pads.

The next remedy is to take the pads off and use a coating on the back side of the pads such as Noise Free. Read about it here. I have used this with success on various cars.

bwiele

My Panamera brakes always squeaked. It was the only feature I didn't seem to have to pay extra for!

NVRANUF

Threshold Braking is the key to dealing with squeaky brakes!
Usually 3 or 4 times is sufficient.

shake1

My brake squalls seems to have a correlation with washing the wheels. Whenever I clean the wheels, it stays squeak free for a while. When brake dust builds up for a while (which doesn't seem to take long in this car), I seem to get a bit of a squeal when inching to a slow stop.

I've tried the hard stop but only twice. Perhaps I'll give the 8-10 times advice a shot.

ipse dixit

The remedy is to bed the brakes (as I noted above).

The solution to avoiding the problem is to stop driving like a card-carrying emeritus member of the AARP.

In other words, drive the car. Hard and aggressively, at least once in a while.

LTP

So I tried few days ago, I brake with heavy nose dive down to 30km/h then pick it back up to 90km/h, did it for 6 times. noise still there, thinking to polish the rotor a little.

Noah Fect

You need more like 100 MPH / 160 KPH to do the job.

cajerseyboy

This worked for my brakes.

step 1 - brake with throttle. (maintain 50mph - 30 mph) 10 times. 5 second breaks in between to cool them slightly. This heats up the brakes.

step 2 Freeway - 5 times, 3rd gear 80-50mph WOT with brakes applied, 5 sec breaks.

step 3 - 1 - 2 mile cool off then repeat Freeway Portion for a second time.

This should match your brakes to your rotors flush.

A couple of observations after doing this for the first time. My PDK would disengage the gear at times so it was a balance between hard braking and throttle. It was not my brakes 'failing' but the computer basically saying 'you have no idea what you are doing, why are you applying gas and brakes at the same time?'

So it was challenging to reduce speed by keeping throttle WO and increase brake pressure to brake failure. It was more riding the brakes with slight speed reduction to keep PDK engaged to get the pads hot. I think a manual would not have these issues. I was in manual mode fwiw.

The squeaks were gone after this process and have stayed away for 2 weeks now.

Fair to say that this is for high performance brakes so you may not have to perform this as intensely. Also try and do this in the early AM when there isn't cars around.

CSK 911 C4S

When my brakes start squealing when coming to a stop I know they just need a good cleaning. After a good car wash and wheel cleaning it usually goes away for a few weeks.

LexVan

In over 46,500 miles, I've NEVER had brake noise. I also have not washed my car since June, and over 3,800 miles in that time.