Similar response from my home dealer. As mentioned in an earlier post, I took the car to the selling dealer in Atlanta, Where I received todays diagnosis.

 

Any update? Was the issue resolved? I have a brand new C2S that has a nearly identical rumble briefly at low RPM like you have described.

 

Better.

It was explained the the 992 version has a redesigned engine and transmission mounting bracket, which does not allow quite enough tolerance for the engine mounts. The mounts, which are highly engineered, contain a type of fluid, pressurized according to operational settings (normal,sport,etc.) have been redesigned, but still fit too snugly.

Of course, Porsche has not notified the owners, as different drivers have a higher tolerance for noises. The redesigned motor mounts cost around $1,500 each, which explains Porsche’s reticence.

As my mind and ears have been focused on the vibration, I now need to “let it go”.

 

Earl, that is an awesome answer. Despite how long this problem has been around and other threads on the same issue, I think you are the 1st person who has provided what sounds like the definitive answer. (Not to rule out that there might be other people whose 992s have had other causes for vibration)
Do you know roughly as of what date the redesigned motor amounts have been included in new 992s?

 

No idea which motor mounts are used during new car assembly.

 

My 2023 992C2 is now in the shop with 300 miles on it, brand new car. I have a vibration between 1500-2000 RPM that was also diagnosed as Engine Mounts. Car is being repaired as we speak. I'll post an update if it clears up. The dealer did test my car against another in the shop to validate the noise was an actual concern... I was totally expecting to hear "it's normal for a 911".

Chris

 

I have no idea how bad or pronounced yours are but some resonance vibrations are supposedly normal in that RPM range…so don’t expect to all go away. My C2 has it right around 1800 but shifts to higher RPM in sport modes.

 

Fuel pumps are no longer on the end of the camshafts. Porsche changed the design and moved them.

 

Keep us posted. There are a lot of people with this issue.

 

Chris.
I took my new 992 Turbo S with 150 miles on it to the dealer for the knocking at under 1800 rpm.

it took the tech 5 minutes while driving with me for him to make the diagnosis of electronic motor Mount noise. He said it’s a “normal operation” for the 992!!!!

Chris did your dealer acknowledge that the mounts were the problem right away ? Did they volunteer to replace them or did you have to make a big deal to force them to do it?


lets us all know Chris if the replacement of the mounts resolves the issue.

thanks
Sportsman1225

 

I took the tech for a drive, he didn't acknowledge anything during the drive other than he heard the noise I was experiencing. Later that week they called back and said they drove another 992 C2S that was in the shop and it didn't make the same noise. After some diagnosing they narrowed it down to engine mounts and said that Porsche also agreed it was likely the cause.

Car is still in the shop, close to 2 weeks now from when I dropped it off... not sure why it's taking this long but I'll be sure to post an update as soon as I get the car back.

It's unfortunate that this is a "normal" noise from some dealers. It really drives me nuts... reminds me of 3" exhaust systems I would put on my Civics years ago that wouldn't quite properly fit over the axle and cause vibration noises haha.

I think this noise is unacceptable on such a highly refined sports car. Period.

Chris

 

Chris.

Chris
I hope the replacement of the PADM
(Porsche Active Drivetrain Mounts)
will resolve the problem. It is definitely a design flaw that Porsche will have to address as more owner’s complain.

Please keep us up to date

thanks
Sportsman1225

 

Did the factory have a bad run of these parts, its not like its a new feature in the car.

 

I really hope they address this issue, and that others can get help with their cars. I'm still waiting, looks like it's close to being ready.



992carrerabase on IG if you want to follow the updates

 

I have exactly the same issue, vibration and odd noise between 1500-2000 RPM. Base 992 2023 model 2500 miles. Any updates? Thanks