I had a weird clunking sound occurring on my new Porsche 991 Turbo in the back left suspension area and took it in to the dealer. He told me there is a TSB on the "Anti-roll bar on the rear axle" and it would need to be replaced. After the repair, it sounds like everything is working fine - no clunking.

Not sure if anyone was aware of this TSB. I couldn't find anything online, so maybe it's relatively new?

 

When did you hear the sound?

I've heard a similar sound occasionally and was going to talk to them about it.

 

Would you be able to get the TSB info? I brought the car in 2 weeks ago for similar sound, but of course the sound went away while I went for a drive with the service technician and they couldnt replicate the sound when I left the car there. Any additional information would be appreciated!

 

My car is brand new. I heard it at the 400 mile mark. It sounded like metal clunking, like a service screw flying around back there.

 

I'll ask the service technician - stay tuned.

 

Which year for the TSB?

 

I'm assuming 2015, the year of my car. The service rep has not gotten back to me yet. Assuming he is on vacation.

 

Technical Information
Service
107/15ENU WF71 4
WF71 - Replacing Anti-roll Bar on Rear Axle (Workshop Campaign)
Revision: October 22, 2015
This revision amends WF71 as follows:
Under Parts Info—Part Number 991 333 794 11, the required Quantity was changed to “2”.
Model Year: As of 2015 up to 2016
Vehicle Type: 911 Turbo (991)
Equipment: Vehicles with electronic damper control PASM and conventional anti-roll bar (I-no. 475)
Concerns: Anti-roll bar on rear axle
Information: This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. The durability
of the anti-roll bar installed on the rear axle cannot be guaranteed on vehicles with high
mileage due to a temporarymanufacturing defect.
As a result, this can cause noises when driving on uneven road surfaces for example.
Action
Required:
Replace anti-roll bar on the rear axle.
Affected
Vehicles:
The VIN(s) can be checked by using PIWIS Vehicle Information link to verify if the campaign affects the
vehicle. This campaign affects 63 vehicles in North America.
Parts Info: Part No. Designation
– Use
Qty.
000 043 210 33  Anti-roll bar
– Rear axle
1 ea.
991 333 794 11  Anti-roll-bar mount
– Anti-roll bar on rear axle
2 ea.
999 084 123 09  Hexagon nut, M10
– Anti-roll bar to connecting link
2 ea.
Tools: • Torque angle torque wrench, 20 – 400 Nm (15 – 296 ftlb.), e.g. VAS 6942 - Torque wrench,
digital
• Open-end/ring wrench socket, a/f 13, e.g. VAS 6947 - Ring wrench socket, a/f 13
2015