Complete brake failure !!

[Porcupine]

@Clive you've said you're going to sell the car immediately it's fixed and will lose lots of money on it as a result. I'm sorry to say this, and I understand how scary the brake failure must have been for your wife, but I think this is a knee-jerk reaction that's not logical when you think about how the Taycan works.

Your friction brakes have failed. The burst pipe means the car was unable to apply enough pressure to grip the brake discs and slow the car to a stop. Yes, it's shocking that the friction brakes could have failed on a well-maintained 3 year old car, but this failure could happen to any car that uses flexible pipes to transmit brake fluid pressure. Unfortunately any component - even one as important as a brake pipe - can fail without warning despite passing QA checks during manufacture.

However... you said your wife was able to slow down normally to a very slow speed before the brakes failed. This is because the unique thing about the Taycan is that at speeds above walking pace (where brake failure could be very dangerous) it doesn't use the friction brakes at all*. It uses the electric motors to slow down - as others in this thread have pointed out.

Any car could suffer the failure that yours did. It's not a Taycan problem. Or a Porsche problem. It's a 'sh*t happens' problem. Someone in this thread said it happened to them twice!

Porsche could argue that the Taycan must be the safest car in the world at coping with a burst brake fluid hose, as the friction brakes are not used at higher speeds where loss of fluid pressure could be very dangerous!

If you're selling your car because you've lost confidence in the friction brakes then I'd urge you to step back and consider the logic in my argument.
Whether you can convince your wife to allow you to keep the car is another question...




* Assuming 'normal' pedal force in 'normal' driving conditions...

Sponsored

 

[daveo4EV]

@Clive you've said you're going to sell the car immediately it's fixed and will lose lots of money on it as a result. I'm sorry to say this, and I understand how scary the brake failure must have been for your wife, but I think this is a knee-jerk reaction that's not logical when you think about how the Taycan works.

Your friction brakes have failed. The burst pipe means the car was unable to apply enough pressure to grip the brake discs and slow the car to a stop. Yes, it's shocking that the friction brakes could have failed on a well-maintained 3 year old car, but this failure could happen to any car that uses flexible pipes to transmit brake fluid pressure. Unfortunately any component - even one as important as a brake pipe - can fail without warning despite passing QA checks during manufacture.

However... you said your wife was able to slow down normally to a very slow speed before the brakes failed. This is because the unique thing about the Taycan is that at speeds above walking pace (where brake failure could be very dangerous) it doesn't use the friction brakes at all*. It uses the electric motors to slow down - as others in this thread have pointed out.

Any car could suffer the failure that yours did. It's not a Taycan problem. Or a Porsche problem. It's a 'sh*t happens' problem. Someone in this thread said it happened to them twice!

Porsche could argue that the Taycan must be the safest car in the world at coping with a burst brake fluid hose, as the friction brakes are not used at higher speeds where loss of fluid pressure could be very dangerous!

If you're selling your car because you've lost confidence in the friction brakes then I'd urge you to step back and consider the logic in my argument.
Whether you can convince your wife to allow you to keep the car is another question...




* Assuming 'normal' pedal force in 'normal' driving conditions...

I agree the problem described in this thread can happen to any vehicle at any time for any reason. Selling the car makes no sense as this potential problem exists in nearly 100% of vehicle's on the road.

The OP has to do what makes them comfortable but I see nothing so far to indicate a unique problem that could not happen with another mass produced vehicle.

Mechanical things are not 100% reliable - that's a fact, and switching from one mechanical thing to another mechanical thing will not change the potential.

but it's not my call…

 

[d00d]

Woman rationality isn't the same, I've found when she doesn't like something, that's final.
Get rid of the car, and maybe also the garage for good measure.

 

[bsclywilly]

This type of failure would warrant an investigation since it’s obviously a critical safety component. Hopefully @Clive will get a full explanation from their dealer. I’ve seen a failed brake hose only once before, a C7 Corvette. It was traced back to a mechanic that had briefly dangled the caliper by the hose during a brake service. The crimp fittings on OEM hoses are very sensitive to being pulled on. A good note for anyone servicing their own brakes. Have you had your brakes serviced ever over the 60k miles?

Also, in addition to the regen and parking/emerg brake, brake circuits in all modern cars have redundancy built in where the front and rear brakes are on separate circuits. If pressure is lost in one, you can still build up pressure on the other axle, but it may require a couple pumps of the pedal.

 

[Ruffy]

More details please. No brakes at all from a higher speed would require that both regenerative braking and hydraulic braking failed to work. I'll guess you wife slowed normally until about 3 to 5 mph where regen stops and the mechanical brakes are supposed to have been blended in to bring the car to a stop. Not unknown for the transition to result in a "coasting" feeling that requires additional pedal travel to bring the car to a stop. It's not right and subject to multiple service bulletins. Possible your wife experienced an extreme case of this condition?

 

[Gru]

link
very similar incident happened recently in Belgium, now in the news
(article in french ?)

 

[whitex]

link
very similar incident happened recently in Belgium, now in the news
(article in french ?)

Title about the Taycan, article starts off about a 922, or is this just an news AI hallucination? Or has Google Translate decided 922 Targa is a Taycan?

 

[Gru]

he had 2 problems. one (noise) with the Targa, not solved, and then the brakes with the Taycan

 

[whitex]

he had 2 problems. one (noise) with the Targa, not solved, and then the brakes with the Taycan

The headline talks about the Taycan, no mention of 922. The article starts off with multiple paragraphs about 922. I lost interest after that, just assumed it's just an AI generated hit piece, filled with unrelated (to the headline) story about unrelated Porsche issues, designef so they can display more adds for the reader to scroll through before getting to information relevant to the headline. Or maybe it's just a style of the news outlet - ramble on about tangentially related stuff before getting to the point of the headline.

 

[Scandinavian]

Title about the Taycan, article starts off about a 922, or is this just an news AI hallucination? Or has Google Translate decided 922 Targa is a Taycan?

There is a part of the Taycan further down I the article.

 

[whitex]

There is a part of the Taycan further down I the article.

Ok so I went back out of curiosity to see how far down is the headline information buried in the article. Than I came across this:

I do not speak French; is this a translation issue, or do French Taycans have engines they can shut off and restart? How do you start the engine on a French Taycan?

 

[Scandinavian]

Ok so I went back out of curiosity to see how far down is the headline information buried in the article. Than I came across this:

I do not speak French; is this a translation issue, or do French Taycans have engines they can shut off and restart? How do you start the engine on a French Taycan?

Good catch!

I am not sure I have an engine in my Taycan, but will go down and have a look for it!

 

[Gru]

owner was told the problem comes from the braking circuit and the flexible pipe that could leak. very similar to what happened to the OP.

He was pissed they do recall for other minor things, and nothing for that very serious issue.

 

[Porcupine]

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

 

[Vim Schrotnock]

@Clive you've said you're going to sell the car immediately it's fixed and will lose lots of money on it as a result. I'm sorry to say this, and I understand how scary the brake failure must have been for your wife, but I think this is a knee-jerk reaction that's not logical when you think about how the Taycan works.

Your friction brakes have failed. The burst pipe means the car was unable to apply enough pressure to grip the brake discs and slow the car to a stop. Yes, it's shocking that the friction brakes could have failed on a well-maintained 3 year old car, but this failure could happen to any car that uses flexible pipes to transmit brake fluid pressure. Unfortunately any component - even one as important as a brake pipe - can fail without warning despite passing QA checks during manufacture.

However... you said your wife was able to slow down normally to a very slow speed before the brakes failed. This is because the unique thing about the Taycan is that at speeds above walking pace (where brake failure could be very dangerous) it doesn't use the friction brakes at all*. It uses the electric motors to slow down - as others in this thread have pointed out.

Any car could suffer the failure that yours did. It's not a Taycan problem. Or a Porsche problem. It's a 'sh*t happens' problem. Someone in this thread said it happened to them twice!

Porsche could argue that the Taycan must be the safest car in the world at coping with a burst brake fluid hose, as the friction brakes are not used at higher speeds where loss of fluid pressure could be very dangerous!

If you're selling your car because you've lost confidence in the friction brakes then I'd urge you to step back and consider the logic in my argument.
Whether you can convince your wife to allow you to keep the car is another question...




* Assuming 'normal' pedal force in 'normal' driving conditions...

Sorry, but this is just wrong on a number of levels. First, I'm a strong proponent of the customer having very high standards - this makes every product better. Does anyone think the Porsche engineers agree with this argument? If so, then they would reduce the severity of a brake failure in their design failure mode and effects analysis. Do you want the engineers assuming that brake failure is not one of the most critical failures??

Secondly, the failure of the 'friction' brakes severely affects the stopping distance in an emergency situation, which is the most important application of any braking system. Is it ok for you to be driving a car that you can't rely on to stop in an emergency?

I am dumbfounded at Porsche's lack of fundamental engineering integrity concerning the foundational aspects of this car. They couldn't develop a charging system that worked. I mean - seriously. The couldn't develop a reliable battery, and now they don't seem to be able to design a reliable braking system. Incredible. I don't support people apologizing for this kind of poor engineering. It only encourages more of the same.

Sponsored