Car25

I'm starting to wonder about my car. After just 800 miles on a replacement motor I get a PADM (Active Drivetrain Mount) failure while driving. This happened before, just after the car was new - they replaced one of the mounts. Another trip to the dealer...

CFIMarco

Same here.
Fault PADM

StormRune

Maybe they misdiagnosed the first time and replaced the wrong one, so the faulty one just got around to throwing a code again?

CFIMarco

They didn't misdiagnosed mines, they failed both within six months.
If either one will fail again I'll have both of them replaced with regular rubber mounts and I bet I won't notice any difference.
PADM is the biggest piece of c**p Porsche ever installed.

StormRune

In my 997, I switched from OEM mounts to the much firmer semi-solid engine mounts up until I sold the car. The effect on handling difference was quite positive but at the same time it introduced a lot of drivetrain/engine noise into the cabin. Since the dynamic mounts give you a notable handling benefit without the noise problem I'm still loving it.

Sorry to hear yours have been problematic. I'd be interested to know how common that is and based upon not seeing much chatter about it either in your thread or elsewhere on the forums I'd have to think it is fairly unusual. Have any others had problems with these?

CFIMarco

When I picked up the car at Porsche after the second PADM change, I asked to the boss of the shop if it was a common defect or just my bad luck. He said they changed quite a bit of active supports, but he could not give me a percentage. Apparently Porsche doesn't like disclosing information about defective parts, the IMS is a perfect example. It took years to make them admitting it was a bad project installing that kind of bearing.

Pavegeno928

Just got this today. This doesn't trigger the "!" warning and it says it is safe to drive on, just won't have the full benefit of the dynamic mounts. Any downside in continuing to drive it other than the annoying warning?

Dewinator

How annoying. Hopefully since I have 73k on the originals already, they aren't as bad as your experiences would suggest. Any idea how expensive they are to replace out of warranty?

MJG911

I just had that on my 25000 mile '13. Dealer replaced it.

Pavegeno928

I called Suncoast and they quoted $1300 each. Assume an hour or two of labor on top of that. Looks like an aftermarket solution post-warranty period as that is a silly amount to spend.

Larry Cable

just FYI I dont recall the 997 GT3's had this degree of issues with their PDEM, might be worth checking in the 991 GT3 forum to see if their's are also failing with some regularity - might indicate a design/manufacturing issue with the 991 gen mounts - just a thought!

verstraete

A reason to consider not adding Sport Chrono on a special order if planning to keep the car post-warranty.

Pavegeno928

The PADM message has been on a few days. Went for a nice drive this morning and again the PADM message was on at start-up. About 30 minutes into the drive it went away. Drove on for several hours with multiple shut-downs and start-ups and the message has stayed off.

Maybe it corrected itself, though I expect it to come back on at some point.

CFIMarco

Have you seen the PADM failure message again or it remained off?

Pavegeno928

It has not come back on. Just got back in town after being gone a week so I'll be driving it again today.

Only odd thing was that I got the fault after our first really cold day down in single digits with snow so not sure if it can be affected by the odd chance that a movable part froze due to to water/ice thus triggering the fault.