I took my 958 Turbo to get some work done a few months ago to the San Diego Porsche dealership. They are great people there - fantastic service BUT, I'm having a problem now that I'm finding hard to accept.

Among the many things they did was replace the break oil. Mine is a 2012 and never had break oil replaced so might as well - it IS very low mileage 40K, but still with years and hard driving that I do, I thought it was needed.

After picking up the car, I noticed the break pedal was not rock hard, instead it feels a little spongy and when you push it down, it eventually feels like it goes all the way to the floor (not quite, but almost there). So I figured there's some air in the lines, told them, they took it in, left it there a few days and they said they did another bleed and that now the pedal was feeling good. OK - excellent, I get on it, I drive like 100 feet and I go to my wife, nope, that feels the same as before!

So I decide to drive instead to the workshop section of the dealership and see a mechanic outside and I ask him if he knows who worked on my car, he replies that he is the supervisor and had somebody do it. I say well, its still spongy, he says well, I hear what you're saying, but actually THAT's how the breaks are on these cars. I say really? - could it be that before I took it in, I didn't realize the breaks were like that and then afterwards I focused on the issue and now I notice it? So I asked him for another Cayenne if I could test and he brought one out, sure enough the break pedal felt very similar. You'd press it and eventually the pedal would go all the way down - VERY typical of what a faulty break system feels like.

I have other cars and none of them feel this way.

So my question to you, do you have a 958 Cayenne and is your break pedal the same as I describe? Does it feel squeeshy / spongy? I'm finding it hard to accept the breaks should be this way and I did a search on google and couldn't find much about this - then searched this forum and couldn't find many complaints on this either (just one thread) but not like a problem that is common. Your input will be GREATLY appreciated as I'm trying to figure out what to do next.

 

Thank you for this post, I got a 958 S and I noticed the same issue. I was getting ready to take it into Porsche and have them look at breaks. But since you had the same issue and it is that way on others I will just accept it. Thanks again for post, it was very helpful.

 

I'm glad to have helped, but I honestly am not happy with thinking that's the way it should be.

Have you had yours for long? - do you think it was always that way or is it more akin to a frog in simmering water?

 

I just purchased my 2015 Diesel and drove it home on a 1100 mile road trip.

I just did a full caliper repaint (off the car) and installed them. I just bled the brake system and get the same soft feeling and the brake pedal going down towards the floor. I can pump it a few times and it will go hard, but then eventually the pedal goes soft again as well.

It had me thinking I hadn't bled the brakes properly. But I don't have much time behind the wheel to really remember what it was like before.

 

Ha! - almost the same I did.

I bought mine in Colorado on Jan '16 and drove it home in San Diego, was a great trip.

I'm thinking maybe there's a special way to bleed the breaks? - I just refuse to believe this is the way it should be for any Porsche - to have a SPONGY pedal, its crazy.

 

I drove mine for only a few miles last night for the first time after bleeding. Although I felt the same as you immediately after I bled the system, after the short drive it seemed to operate within reason and met my expectations. I will continue to drive it this weekend and report back.

 

No I have not had the 958 long but I have had other Porsche 911's. So I can not recall how they felt before I got the calibers repainted. I am thinking it is something to do with how the breaks are being bleed.

I am going to Porsche of Atlanta and do a test drive in another 958 and see how the breaks feel. Will keep you posted.

 

I drove mine around all weekend and didn't have any further concerns. Nothing was abnormally soft and brake performance was as expected.

 

That sounds great, please do and let us all know!

 

I have the same issue I am chasing for the last 4 years. I had my calipers repainted and ever since my brake pedal feels softer. I had 4-5 regular bleeds and 2 advanced brake bleeed procedures using the scan tool to bleed the abs pump. Still feels softer than before…. I don’t know what to do anymore. I’ll inspect the vacuum hose to the brake booster byt I doubt this is the culprit since the issue happened right after the paint shop removed my calipers for repainting. I thought they might messed up something on the calipers or how they assembled everything but I still haven’t disassembled everything to inspect them. Also recently I am hearing hissing sound from my brake pedal when pressing it, not sure if that’s related or it was always there. Strange thing is that if I press the brake pedal 2-3 times while driving, the 3rd time it feels like it used to feel always before.

Any insight would be helpful