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Buying a 957 Advice

Spy

PCGB Member
Member
Hi all,
I am considering adding a Cayenne to the Spy fleet and looking for some guidance and advice from all you knowledgeable folk.

I quite like the look of the facelifted 957 model from 2007 so will try and pick one of these up although I wouldn't rule out a 955.

I have outlined some questions below.

MPG: I understand that there is very, very little difference in mpg between the 3.6 V6 and 4.8 V8.
Is this correct ? If so, other than maybe the cheaper RRP, why would anyone buy the V6 over the V8 ?
Is the Turbo much worse on mpg ?

Engine Issues: The earlier 4.5 V8 is known to suffer from bore scoring issues like the 911 engines. Any common issue to watch out for on the 4.8 or the V6s ?

Prop Shaft: Apparently the 955 and 957 suffer from prop shaft issues. Is it a certainty the prop shaft and/or bearing will need changing around 100k miles ?

Air Suspension Reliability: Having previously owned a Range Rover Sport that suffered from air suspension issues, how reliable is the VW/Porsche system and when it does go wrong, what are the typical costs ?

Spec: What are the most important options to look for on used cars I look at ?

General: Any other common issues I should be aware of ?

Thanks in advance for all your help guys.
 
Hi
I have a 955 4.8 V8 2005 owned for 2 years.Been great up to now,when I first bought it,it needed new coils as every one was cracked which is a common fault,replaced with updated versions.It also needed 2 new camshaft sensors and rear parking sensors.It also had a low oil warning on the dash(level was fine) which after a lot of investigation was traced to a fault in the instrument software which retains certain faults even when the fault has been rectified,pulling the fuse for the instruments erases the fault.
My propshaft started banging at 83000 miles,its the bearing support that generally goes,I bought an after market item that can be fitted without removing the prop,£400 as opposed to £1100 for a new genuine propshaft.I had the car lowered slightly as mine doesn't have the air suspension.MPG around town is around 14/15,on an 1100 mile run to Scotland and back 24MPG was achieved.The cooling hoses are plastic and are a major fault when they go,mine were replaced by the previous owner at a cost of £1400 with the uprated aluminium ones.The car is a great drive and has plenty of room for 4 and the dog,955's can be picked up for 5kish and are a bargain,look for bills for cooling pipes/propshaft having been sorted.I love mine and hope to keep it for many years yet.
 
Hi, I bought a 957 GTS earlier this year, had a few issues along the way but pretty minor, to be expected issues with a car of it's age and mileage, it is helpful if you are slightly handy with a tool set.

I went for the 4.8 as it sounds superb and avoids the issues that plague the 4.5. There have been some instances of the 4.8 having the same issue but its pretty rare, hence I took the plunge.

For a happy, worry free life, the 3.6 is the one to get, they're bullet proof as they are an evolution of the tried and tested 2.8 VR6 engine. I'm actually quite tempted to buy myself a 3.6 manual cayenne on springs for a total worry free commuter car.

The props can go, as mentioned above, mine was done in the 80k mile area, the previous owner fitted a £400 bearing upgrade kit.
Air suspension, it can go but as you're familiar with the range rover system, the VW one is easier (so I heard)
The 4.8 is pretty juicy, 12-17 mpg is what I see recorded on the trip.

Things to look for, rust! They do rust, the rear doors on the face and on the inside where it presses against a rubber seal.
Under the chassis can rust too, especially on cars from up north. Southern cars I viewed were in much better shape in terms of rust.

Rear tailgate struts, these can wear but they're a cheap and easy replacement
Headlight fogging up, this can ruin the HID unit if bad.
Listen for noises from the engine, marbles in a can, whirring... (If the car has PDCC, you will probably have a whirring sound from the pump, they all seem to do it)

Here is a thread on my car, it covers a lot..

http://911uk.com/viewtopic.php?t=133062


Good luck!
 
Tailgate struts are a weakness as well,replaced mine yesterday £65 for aftermarket replacements,took about 2.5 hours all in including cleaning the interior panels after refitting.
 
I own the first Cayenne that came into the country in 2003.
It has a cert to confirm.
It is in pretty good nick and only done 65K
Anyone interested ?
 

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