After reading up on the procedure from the manual, I did my 08 Cayenne S preemptive battery swap. At 5yrs and 3 months I felt it was due especially with the summer heat. I treat batteries as maintenance service items and 5 yrs is usually my limit. (especially in a Cayenne where it is not just a Sears trip for a battery) I got the Autozone Duralast H8 ($135) and picked up a 10mm triple square bit from amazon. The hardest part was lifting the sucker out. Once the battery was in, just a local drive to reset PSM and all is good. Definitely a DIY with the triple square bit and the owners manual.

Stay cool

 

I changed mine in the 2005 a few years ago, and now my 2008 Cayenne S is approaching the 5 year mark. But since the battery does not suffer the elements as much as being in the engine compartment, I wonder if more than 5 years is OK. The battery looked brand new after 5 years, and the guy at the auto parts store looked at me like I were crazy for getting rid of the battery before it was really dead and in that condition.

Some people are getting more than 7 years with their Cayenne batteries. Not sure.

 

Same here..but I have had batteries die with NO notice and it isn't just a casual drop in battery like my Boxster. My BMW worked fine one moment, went into a store and came back out and no go (only 3 yrs old). BMW replace it for free but ruined my day waiting for BMW road service to come and swap it out. (that battery is in trunk)

 

Damn...I hadn't even thought of swapping out my battery... food for thought. Thnx.