Anyone care to chime in the mileage they got from their front & rear rotors. I'm doing front pads in few weeks, but currently my rotors are fine at 36,500miles.

Thanks

 

Porsche recommends changing pads and rotors each time your brakes need to be replaced. That being said, the rotors may not need to be replaced. My pads typically last for approximately 40K miles. On my first brake pad change, I measured my rotor thickness with a caliper and they were still well within spec. I changed the rotors with my second set of pads, at roughly 80K. It's important to change your brake fluid at the recommended intervals too.

 

fronts 36 rears 75

 

Thanks guys. Mine has 36+ k. Rotors seem to be fine but I will use calipers. Brake fluid was changed at the 36K major maintenance.

 

I think most manufacturers reccommend rotors with pad changes.
Fitment is optimal that way.
36K seem low use to need rotors.

 

Not a Cayenne, but still on original rotors on my Touareg at 54k mi. This is a 5900lb car that has several miles towing a 5000lb Airstream travel trailer and has seen a weekend at a track event in the advanced group. Original pads were replaced with Hawk HPS pads at 24k when the sensor light came on. Hawks are wearing like iron but don't grab as well as stock pads.

 

Curious about the rotor thickness issue, if when you change pads let's say your rotors have acceptable thickness by a few mm but long before the new pads need replacing the rotors will be under the min. thickness. Should they be changed?

I know what I would do (replace the rotors at the time the pads are changed) but curious what is common practice?

My front pads & rotors were replaced when the P!g was turned in by the original owner because it was being CPO'd, the rears were not touched. As of now (apx. 35K mi. later) both the front and rear pad sets are close to hitting the warning sensor (< 5k mi. left). I will be replacing all pads and all rotors this fall (and tires too from the looks of it).

 

Just went through this thought process myself. Here is the data I accumulated:

1) Tech Specs for all models:

I did a search through Google for: Cayenne technical measurements/Brake wear limits and the top result is a .pdf that was right on the money. I didn't put that data there, I don't have that data to put there... I just found it by doing a search on Google.

2) Digital calipers won't give accurate readings of the discs due to the lip on the rotor and the depth of the rotor. You'll need a purpose made brake rotor micrometer, a rotor measurement tool or an attachment kit for the caliper you already own that turns it into a "good enough" deep welled micrometer. There are lots of tools under $50 for sale online. Do a search on Amazon for "brake rotor micrometer" and at least 10 will come up to give you ideas... though, of course, you don't have to buy there.

3) Measurements indicate that after 46,545 miles on my C tt S I have burned off only .6mm and .4mm on the front and rear rotors, respectively, worst case. That is out of a maximum of 2mm allowed. Most of those 46k miles were highway miles.

 

I have one of each style, the first has no problems getting around the lip.

 

I'm going to be replacing mine in few weeks (front & rear). Currently at 36k.

 

Every second pad change, I change the rotors.

 

Oops. 40k not 36k. I'm stuck behind

 

I'm going on the 3rd set of rotors and pads in 51k miles. I just bought the ride about 2 months ago but the carfax showed it was done at 15k and 35k, both rotors and pads.

 

It depends driving style and where (freeway-city-hills..).
With a CS, I do about 45k miles with the fronts and about 65k with the rears.

 

Sounds like dealer rape