Recall - Front Brake Hoses Can Crack and Leak Fluid (ARB0) - June 19, 2024 -- [2020-2025 Taycan]

[tigerbalm]

So disappointed that my carbon ceramic brakes has the same €5 hose as everyone else

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[Scandinavian]

I am very surprised about this issue. I can understand that Porsche have enormous problems with their SW. It would be expected since they always have relied on the subcontractors to deliver both HW, like seats, and the control units for the seats. Then specify interfaces to integrate the item. But when you know there are more than 100 ECU’s in the car how can they communicate reliably.

BUT this problem with brake hoses is absurd. Porsche have designed this type of systems for some 75 years +. And one thing Porsche highlighted a lot was that the brake system should hold up to be used 25 times from 80% of Vmax to low speed, without any problems. So they focussed very much about the brake system, but not the components??

Sounds like accountants running the design team.

 

[alexsas]

looks like this is what @Clive experienced recently

https://www.taycanforum.com/forum/threads/complete-brake-failure.19839/

It’s appalling how Porsche was reacting to this issue.

 

[Porsche-Guru]

For UK owners...

Checked with Porsche UK dealership just now.

They have responded that only 365 cars are affected in the UK... against the ARB0 recall.

 

[Tooney]

For UK owners...

Checked with Porsche UK dealership just now.

They have responded that only 365 cars are affected in the UK... against the ARB0 recall.

My dealer indicated that less than 700 cars are on the US list. My guess is that his current list has not been updated with all the VINs in the recall.

 

[DougFrisk]

So disappointed that my carbon ceramic brakes has the same €5 hose as everyone else

Since there are two different parts for left and right sides listed it's possible that the PSCB and PCCB systems use a different hose than the standards brakes. Or there may have already been an iteration.

 

[laua]

I am very surprised about this issue. I can understand that Porsche have enormous problems with their SW. It would be expected since they always have relied on the subcontractors to deliver both HW, like seats, and the control units for the seats. Then specify interfaces to integrate the item. But when you know there are more than 100 ECU’s in the car how can they communicate reliably.

BUT this problem with brake hoses is absurd. Porsche have designed this type of systems for some 75 years +. And one thing Porsche highlighted a lot was that the brake system should hold up to be used 25 times from 80% of Vmax to low speed, without any problems. So they focussed very much about the brake system, but not the components??

Sounds like accountants running the design team.

100% agree. This is just traditional auto parts and technology, for Porsche to mess this up definitely is not a good look. I can ride out and convince myself to live with electric gremlins but recalls on core auto safety stuff is pretty jarring.

 

[WasserGKuehlt]

[...]brake system should hold up to be used 25 times from 80% of Vmax to low speed, without any problems. So they focussed very much about the brake system, but not the components??

Sounds like accountants running the design team.

No. They haven't gone incompetent overnight. The problem seems to be caused by specific circumstances (steering and suspension/driving conditions) - that's what I infer from the NHTSA report. Think prolonged parking at full steering lock in lowest suspension mode on an incline, for instance (<- making this up, but it's what I imagine).

I intend to find some time this weekend to hoist the car up and have a proper gander (or "optical analysis", in Porsche-speak).

(just bumped into this pic of my front wheel; you can see the hose having a rather sharp bend; I could see this being exacerbated in different suspension positions, and eventually cracking with prolonged stress.)

 

[Scandinavian]

No. They haven't gone incompetent overnight. The problem seems to be caused by specific circumstances (steering and suspension/driving conditions) - that's what I infer from the NHTSA report. Think prolonged parking at full steering lock in lowest suspension mode on an incline, for instance (<- making this up, but it's what I imagine).

I intend to find some time this weekend to hoist the car up and have a proper gander (or "optical analysis", in Porsche-speak).

(just bumped into this pic of my front wheel; you can see the hose having a rather sharp bend; I could see this being exacerbated in different suspension positions, and eventually cracking with prolonged stress.)

well to route a brake hose so badly that suspension movement causes it to split is not very competent is it? I mean they have experience from the Cayenne with a lot of suspension travel and different modes, and I never heard of a problem like this, for that model. In one of the posts it seems Porsche more or less admit to having fitted a too short hose? New longer hoses will be fitted.

 

[WasserGKuehlt]

well to route a brake hose so badly that suspension movement causes it to split is not very competent is it? I mean they have experience from the Cayenne with a lot of suspension travel and different modes, and I never heard of a problem like this, for that model. In one of the posts it seems Porsche more or less admit to having fitted a too short hose? New longer hoses will be fitted.

well okay, not sure why people are so hellbent on assuming incompetence here. Do you really think they only designed/tested this for driving in Normal/for 80% of the suspension travel?

And I'm not sure where you got this from: "new longer hoses will be fitted"? The report says "hoses with increased bending radius" - which I infer to mean stiffer/thicker/reinforced hoses. Also, dealers (ie those who will perform the repairs) don't yet have details, so I'm pretty damn sure none of us does, either.

 

[007]

Nothing worse than the base brakes on former MY2019 Cayenne… often would fail on first push in rain, snow and extended freeway driving. That was a death trap. And always squeaky…

 

[D00notD00d]

Linking in this
https://www.taycanforum.com/forum/threads/complete-brake-failure.19839/page-10

 

[Scandinavian]

And I'm not sure where you got this from: "new longer hoses will be fitted"?

The statement quoted from Porsche said New Length, not longer hoses. My memory was not too exact.

https://www.autocar.co.uk/car-news/new-cars/porsche-recalls-all-taycan-models-globally-brake-fix

 

[WasserGKuehlt]

The statement quoted from Porsche said New Length, not longer hoses. My memory was not too exact.

https://www.autocar.co.uk/car-news/new-cars/porsche-recalls-all-taycan-models-globally-brake-fix

and

(from the 1st post on this thread).

 

[bsclywilly]

For anyone who is particularly nervous, or just curious, you can inspect the hose visually by steering to full lock and looking from behind the tire. The hose bend in question is just behind the upper ball joint and it indeed has a bend radius that is really tight. You can only see the side facing out so also pull back on the wire coil to feel the far side of the hose for crimping.

Here’s a more zoomed out pic.

The flex hose is rather short and leads to a hardline that runs down the front of the upright and into the caliper.

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