New Engine & Rear Differential lock not getting engaged on 05 Cay

[idiosyncratic]

Hello,

I was planning on picking up a 2005 Cayenne S however during the pickup inspection, I noticed that the rear differential lock is not getting engaged using the rocker switch. I am able to engage Low Range (and LED lights up and message is displayed on the disply) and also Center Differential lock is getting fully engaged, however even after pushing the rocker switch forward multiple times does not engage the rear differential locks. On the instrument panel, I also get the yellow sign for "All-wheel drive system faulty". Is this something I need to worry about? From what I can recall, the message on the instrument panel was only when I put it on low range. This cayenne also has air suspension height adjustment and that seems to work fine. It is automatic transmission.

The seller (a local dealer) said they will take it to the porsche dealership .. but not sure if all they will do is reset the computer??

Also, the engine was fully replaced by the porsche dealership less than a 500 miles back.

Any help will be really appreciated!! I am planning to make the purchase this week (hopefully!! )

Thank you.

[mudman2]

If I remember correctly the read diff lock is not standard, you have to have the off-road package option.

I would be more worried about why the engine was replaced. Few ever need to be replaced, if it had been thrashed to death then I would also worry that the transmission and the diffs may also be "worn" to say the least.

Hello,

I was planning on picking up a 2005 Cayenne S however during the pickup inspection, I noticed that the rear differential lock is not getting engaged using the rocker switch. I am able to engage Low Range (and LED lights up and message is displayed on the disply) and also Center Differential lock is getting fully engaged, however even after pushing the rocker switch forward multiple times does not engage the rear differential locks. On the instrument panel, I also get the yellow sign for "All-wheel drive system faulty". Is this something I need to worry about? From what I can recall, the message on the instrument panel was only when I put it on low range. This cayenne also has air suspension height adjustment and that seems to work fine. It is automatic transmission.

The seller (a local dealer) said they will take it to the porsche dealership .. but not sure if all they will do is reset the computer??

Also, the engine was fully replaced by the porsche dealership less than a 500 miles back.

Any help will be really appreciated!! I am planning to make the purchase this week (hopefully!! )

Thank you.

[idiosyncratic]

thanks mudman2.

Valid point on the engine - the local porsche dealer replaced it since there were vibrations (that's the reason they gave me) .. the warranty expired in dec 08 and the engine was replaced in July 09 and I'm told that it was a new engine that they put in and was covered by Porsche warranty (it did concern me as to why porsche will cover it after warranty has expired?) .. it is a local car with abt 45k miles with 2 previous owners and at least from outside/inside looks to be clean and the gear shift happens to be smooth on road/hwy

It does have new tires/brakes replaced recently at 35k (not sure if that's another indication of it being thrashed in the past)

re: the rear diff locks, yes I think thats an option however the error message for "all wheel drive system faulty" did show up at least on low range ...

any additional comments are welcome!

thanks

If I remember correctly the read diff lock is not standard, you have to have the off-road package option.

I would be more worried about why the engine was replaced. Few ever need to be replaced, if it had been thrashed to death then I would also worry that the transmission and the diffs may also be "worn" to say the least.

Hello,

I was planning on picking up a 2005 Cayenne S however during the pickup inspection, I noticed that the rear differential lock is not getting engaged using the rocker switch. I am able to engage Low Range (and LED lights up and message is displayed on the disply) and also Center Differential lock is getting fully engaged, however even after pushing the rocker switch forward multiple times does not engage the rear differential locks. On the instrument panel, I also get the yellow sign for "All-wheel drive system faulty". Is this something I need to worry about? From what I can recall, the message on the instrument panel was only when I put it on low range. This cayenne also has air suspension height adjustment and that seems to work fine. It is automatic transmission.

The seller (a local dealer) said they will take it to the porsche dealership .. but not sure if all they will do is reset the computer??

Also, the engine was fully replaced by the porsche dealership less than a 500 miles back.

Any help will be really appreciated!! I am planning to make the purchase this week (hopefully!! )

Thank you.

[idiosyncratic]

Additional details on why the engine was replaced - there as knocking noise on the left side of the engine and there was a high leakage on cylinder 5 and the walls were scorn