pancholi

CTT 2004 77K miles
the OBD show ignition coil 6 faulty.
worth replacing all or just the one?
how are the cylinders numbered?
cheers

JohnnyBahamas

I'd replace them all because 1) - they all eventually fail and, 2) you'll have the engine beauty cover off exposing at least one bank anyway so might as well shoot the whole 9 yards of ammo and take the other beauty cover off to do both banks.

The good news is, once you get the stupid engine beauty cover off, replacing the coils is easy.

If you haven't done the plugs yet, then it's the perfect time to do both.

It'll probably improve your gas milage a digit or two, too.

ltc

^+1
Cracked coils lead to fouled plugs, even more so if your Turbo P!g consumes oil (very common)

Replace all coils and plugs IMHO.

Miamirice

I assume there is no pressing reason to swap unless coil issues start to show themselves? 2006 S with 23.5k

ltc

It depends on the revision of the coils installed.

It also depends on what type of person you are....the type who replaces the coolant tubes before they rupture and ruin your starter and transmission seal or the type who waits for something to fail and then deals with collateral damage.

Dennis C

I replaced all 8 of mine. They aren't expensive. You may as well get the newest version installed.

hahnmgh63

Replacing my plugs and coils tonight. So I decided to replace the new purge valve that I had on the shelf. While I was pulling it apart I noticed the Torque strut bushing (larger one) was cracked most of the way through so I'm ordering a new one of those too. I just had it off 10K ago and didn't notice the cracks then and I'm sure I inspected it, at least I think I would have???

spooltime

As a reminder, the latest iteration of the coil part number ends in "020." The "009" coils have been superceded, so avoid using them if possible. And as everyone else has also said, definitely do all of them at once.

hahnmgh63

Yea, I had a new set of the 09's that I bought last years so that is what I put in last night. I guess there is a problem with being a horder. They were replacing .05 though.

mcbit

On an aggregated 5yrs and 184k km of Cayenne ownership I haven't replaced a single coil pack.

Miamirice

Well......I actually plan to do the coolant pipes before because of:

1. Potentially it could leave my wife stranded
2. The reasons you mention

However, I have never had collateral damage from a coil failure, I don't see the correlation unless you are referring to a fouled plug?? Most vehicles will go into limp mode and run just fine if you don't run high RPM. Normally if one fails I pull them at that time, and may replace the plugs if the interval is there to justify.

Is there something different about a Porsche I should know regarding a misfire? Did they put out a crappy coil in 2006 that has since been improved.....I guess this is my question specifically. I see what spooltime posted about part# change but is there any real info on what the change was?

ltc

There have been at least 7 revisions of the coils that I can recall ... And I never owned a Cayenne.

endless_corners

??? Never owned a cayenne ???

endless_corners

Do you have the most recent PN?

hahnmgh63

He said "he never owned a Cayenne" but what he may have meant to say was "the Cayenne owned him".