ARB0 recall and Symptom-based workshop manual Service 146/21ENU 4652

[ZenicaNC]

My MY2020 Turbo is at the dealer. I dropped it off there End of May. I initially brought it in due to a noise from the front right wheel when turning left at low speeds without applying the brakes. Being aware of the recall ARB0 I wanted to be certain this wasn't related. I also have some issues with the screens showing the loading symbol without actually loading anything. This also means that screen and those functions are inaccessible unless they have a duplicate control using the stalk controls or center console.

I received word the other day that the ARB0 cannot be done and they have given up trying to find the part. The ARB0 notice indicates "Safety Risk Reduced front brake functionality may increase the risk of a crash." but how likely is this to happen? Should I drive it gingerly in the mean time?

I found a Porsche document on the NHTSA site describing a noise from the front axle but the dealer didn't mention doing any of the steps it talks about. It does seem to apply based on symptom description. The only difference being I hear it more when turning.

nhtsa.gov

Do I have any ground or standing to say they should keep me in the loaner until this is checked and ARB0 is completed?

Honestly, I have always thought the brake pedal in this car was a bit.... ineffective. Like it takes many more feet to stop and more time than is expected or comfortable. This seems especially true at highway speeds. I know it is a heavy car at 5100lbs but our 2016 Cayenne hybrid is either the same or a bit more with cast iron brakes and it stops more confidently. I have read that some feel the Taycan brake pedal was higher and firmer after the campaign was completed.

Are there any other Porsche documents related to this front axle noise anyone is aware of? And TSBs perhaps?

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[GreenHornet]

They gave up ARB0? That's strange. Here in Norway they are able to get the parts and still doing the recall. They are not allowed to release the car to the customer if they take the car in for a recall unless they fix it.

 

[ZenicaNC]

They gave up ARB0? That's strange. Here in Norway they are able to get the parts and still doing the recall. They are not allowed to release the car to the customer if they take the car in for a recall unless they fix it.

Yes, gave up. The dealer sends videos from the tech as the car is in for service. In the video he states "unfortunately the brake hoses are no longer being produced and while the vehicle was in service here I've been trying relentlessly trying to try and get brake hoses from another dealerships that have them in stock however we were not uhm, we were not successful in getting the brake hoses in stock so I was not able to perform that campaign at this time."

As for not being allowed to release the car if they take it in for a recall without completing that recall, this sounds like a benefit of your countries laws because I am expecting the service advisor to call any time today saying I can come get it, despite the recall not being performed.

EDIT:

What dealer do you use? I'd like to contact them and inquire if they will sell me the parts or sell/transfer them to my dealer provided the parts are compatible and not different due to EU/US differences.

 

[mystermykee]

That's interesting. Taycans coming off the production line are using the same updated brake lines are they not? Surely, brake lines can be produced much faster than Taycans....

 

[chun]

Sounds like bullshit from your incompetent dealer.

Would change dealer and bring it to another. Would also inform Porsche central.

 

[MrJones02]

For what it's worth, I also have a MY 2020 Turbo and indeed the brake pedal wasn't all that good (PSCB's as standard) ... yes, the car still stopped but didn't really give me much confidence. I only drive 1 car, I guess I adapted to it, when I took my car in for the brake-hose recall I got a base Taycan with the "regular" brakes as a loaner ... at the first intersection I already felt the massive difference in braking.

After the brake hoses were changed, the brakes were much better, not sure if it has to do only with the hoses or the fact they probably changed the brake-fluid when they were done as well.

As for front axel noise, I occasionally have some squeaking when turning left at low speeds. Always thought it was the brake-pad. Combined with occasional rattling of the front fans, I never know if people are looking at me because the car draws attention, or because it's making a squeaky and/or rattling noise LOL.

 

[chun]

After the brake hoses were changed, the brakes were much better, not sure if it has to do only with the hoses or the fact they probably changed the brake-fluid when they were done as well.

Neither. ARB0 also involves recoding the brakes with a new software, changing how the brakes are blended between regen and physical.

 

[Tooney]

Text search for noise at Taycan TSB list maintained by @rs38

 

[ZenicaNC]

Sounds like bullshit from your incompetent dealer.
Would change dealer and bring it to another. Would also inform Porsche central.

Ha. The problem is the other nearby dealer is staffed with assholes. From salespeople that use sleezy tactics to service advisors that look for ways to avoid any warranty work. I used to take our Cayenne there which has a Fidelity plan. At first, they didn't want to accept it. Then, they would be slow giving Fidelity the information needed to get an approval. Then they would tack on things Fidelity wouldn't cover because they didn't like the negotiated hourly rate.

When we were shopping for the Taycan, their sales dept was pretentious and tried tactics straight out of the 1970's. I never went back.

For what it's worth, I also have a MY 2020 Turbo and indeed the brake pedal wasn't all that good (PSCB's as standard) ... yes, the car still stopped but didn't really give me much confidence. I only drive 1 car, I guess I adapted to it, when I took my car in for the brake-hose recall I got a base Taycan with the "regular" brakes as a loaner ... at the first intersection I already felt the massive difference in braking.

After the brake hoses were changed, the brakes were much better, not sure if it has to do only with the hoses or the fact they probably changed the brake-fluid when they were done as well.

As for front axel noise, I occasionally have some squeaking when turning left at low speeds. Always thought it was the brake-pad. Combined with occasional rattling of the front fans, I never know if people are looking at me because the car draws attention, or because it's making a squeaky and/or rattling noise LOL.

I haven't felt comfortable with the Taycan's brakes since buying the car. On the test drive I didn't really notice it because we drove low speed in a congested area. Even the extended test drive home, I was to cautious since it wasn't my car and so I didn't drive where I would need to slow down quickly from highway speed. That and I was too taken in by the car as a whole.

Neither. ARB0 also involves recoding the brakes with a new software, changing how the brakes are blended between regen and physical.

I wasn't aware of this. I thought it was just the hoses.

Text search for noise at Taycan TSB list maintained by @rs38

Will do--thanks.

 

[ZenicaNC]

Text search for noise at Taycan TSB list maintained by @rs38

OMG!

I have another one of the issues @rs38 has in his list after looking for the word "noise".
Squeaking from the front seats. The dealer pretended they couldn't verify it.

It happens mainly with the passenger seat when my wife sits in it. She's all of 106lbs soaking wet.
It squeaks like its being stressed to its limit.

I'll have to bring this up to them.

 

[Speuk]

As others have said, ARB0 also includes reprogramming the PSM to change the behaviour of the transition from recuperative braking to mechanical braking see screenshot

 

[TaYcanAficionado]

I can't even believe dealerships are make statements like the "brake hoses aren't being produced". Even if that was supposed to be true, there are aftermarket brake hoses that fit the taycan available at a fraction of the dealership price; like $15 or even less each. Morally speaking, it would have been honest on the dealer's part to just install a couple of aftermarket brake hoses so that you are not in danger of crashing the car because of brake system failure until the original brake hoses become available; and then call you to go and install the original ones once available. Instead of just keeping the car for days, weeks or months doing nothing.

 

[Speuk]

I can't even believe dealerships are make statements like the "brake hoses aren't being produced". Even if that was supposed to be true, there are aftermarket brake hoses that fit the taycan available at a fraction of the dealership price; like $15 or even less each. Morally speaking, it would have been honest on the dealer's part to just install a couple of aftermarket brake hoses so that you are not in danger of crashing the car because of brake system failure until the original brake hoses become available; and then call you to go and install the original ones once available. Instead of just keeping the car for days, weeks or months doing nothing.

Agreed, complete nonsense, brake hoses from MY 2025 will fit. The old brake hoses were being fitted to J1.2 cars when they were first launched my J1.2 4S ST need the ARB0 campaign before it could be delivered.

 

[gtm]

I haven't felt comfortable with the Taycan's brakes since buying the car. On the test drive I didn't really notice it because we drove low speed in a congested area. Even the extended test drive home, I was to cautious since it wasn't my car and so I didn't drive where I would need to slow down quickly from highway speed. That and I was too taken in by the car as a whole.

The brake hoses being unavailable sounds like BS but I suppose there could be shortages due to parts being held at the ports hoping the import duty gets rolled back. Still, there should be availability for a recall item. Try Suncoast Porsche.

Replacing the brake hoses by themselves will probably not do much to improve your pedal feel. You also need to ask for WPK0. That is a workshop campaign and not a recall, so it won't be done unless you specifically complain about the stopping problem (and hand them a copy of WPK0 so the service department can't claim ignorance. Search the NHTSA website.). Only the front brakes are bled after replacing the brake hoses. WPK0 requires that the entire brake system be ventilated, updates software and in some instances calls for the brake system hydraulic unit to be replaced. A lot more involved than just bleeding the brakes, and requires the PIWIS to ventilate/bleed the system properly.

Two service visits did nothing to fix my brakes and the dealer tried to tell me my car, with the same apparent symptoms as yours, was normal. On #3 I went in with copies of WPK0 for the service advisor and the tech. Totally different brakes afterwards. Higher pedal, firmer pedal and now almost imperceptible where the car transitions from blended bakes to solely mechanical (right at 3 mph). For some reason this problem does not happen to every Taycan but what you are experiencing is not right and there is a cure.

 

[ZenicaNC]

The brake hoses being unavailable sounds like BS but I suppose there could be shortages due to parts being held at the ports hoping the import duty gets rolled back. Still, there should be availability for a recall item. Try Suncoast Porsche.

Replacing the brake hoses by themselves will probably not do much to improve your pedal feel. You also need to ask for WPK0. That is a workshop campaign and not a recall, so it won't be done unless you specifically complain about the stopping problem (and hand them a copy of WPK0 so the service department can't claim ignorance. Search the NHTSA website.). Only the front brakes are bled after replacing the brake hoses. WPK0 requires that the entire brake system be ventilated, updates software and in some instances calls for the brake system hydraulic unit to be replaced. A lot more involved than just bleeding the brakes, and requires the PIWIS to ventilate/bleed the system properly.

Two service visits did nothing to fix my brakes and the dealer tried to tell me my car, with the same apparent symptoms as yours, was normal. On #3 I went in with copies of WPK0 for the service advisor and the tech. Totally different brakes afterwards. Higher pedal, firmer pedal and now almost imperceptible where the car transitions from blended bakes to solely mechanical (right at 3 mph). For some reason this problem does not happen to every Taycan but what you are experiencing is not right and there is a cure.

I have bookmarked the WPK0 and noted to print it.

As for my Taycan, it is still at the dealership. I was wrong, the SA did not reach out to me yesterday or the day before. Today is a holiday so I am not expecting to hear back from them.

Monday will be the earliest I may hear back. I researched online the legality of them retuning the vehicle with a safety defect. The US doesn't have any such laws like Norway but the general consensus of material is that if the manufacturer has issues a "stop driving" order to consumers, then the dealer would be in a rather compromised legal position returning the vehicle without effecting a repair. I don't see that Porsche has done this though they have issued a "stop" order for deliveries of vehicles and a "stop" order for service loaners which is not dissimilar to a "stop" order to the consumer.

If it warrants pulling vehicles from the loaner fleet and not selling vehicles under the campaign then it stands to reason I shouldn't be driving one either.

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