I haven't done the bushings, so I'm not really sure. My assumption is that the drop-link bushings wear out, but I'm not sure. I see this one discussed sometimes on other technical forums.

For your air suspension, I'd wait for it to fail before rebuilding it. Typically the seal goes bad and it struggles to compress air quickly enough to change the suspension height, triggering a warning light/chime. The rebuild is only a few hundred dollars.

My primary fuel pump failed, and I've still got my original secondary fuel pump. When mine failed, I experienced an intermittent loss of power. Others have experienced a complete failure, leaving them stranded. I'm not sure how the two pumps work together. My issue was an inability for my pump to provide consistent fuel pressure at the fuel rail.

I've stuck with OEM horns. The current set is over two years old!

Sorry I don't have more answers for you.

 

Scot,

You should come to the Porsche Breakfast Club's Second Saturday Breakfast meeting. The next one is March 10th at 8:00 AM. It's at Village Inn Restaurant at Colorado Blvd and I-25. I'm planning to be there. Hopefully I'll have the 911 back from the mechanic. If not, I'll show up in the Cayenne.

 

Front control arm bushings are the ones that typically need replacing due to wear.

You can change just the bushings, but I had both my control arms replaced as they came with new bushings and the integral ball joint.

I had both control arms replaced at about 70,000 miles due to clunking when going over bumps. Upon visually inspecting the bushings, they indeed were torn.

Also check out your rear tailgate struts to see if they can hold the tailgate up. They do soften over time.

 

Good call on the rear hatch struts. The other one that fails is on the emergency brake pedal, requiring you to lift the brake pedal up with your foot.

 

So the brake pedal has a strut and not spring loaded...lol...overestimating at work.

 

if you are able to understand french, you will find many answers and known issues with cayenne here : www.forum-cayenne.com