So I am going to be replacing the pre cat o2 sensors on my newly acquired 996tt.

Should I do plugs while I am in there?

The records indicate plugs only have 10k miles on them...but do you think there is an age?
Like should I replace them if they are 4 years old? Or not worry right now?

Thanks!

 

plugs aren't something that tend to be problematic, though coils are more likey to crack with age ( replace w newer 997's ) and i wouldn't worry about them at all w/ only 10k miles on them. there will be enough annoyances that will crop up over time, if not with regularity, that will keep you fixing/upgrading/replacing stuff, without having to imagine issues lol. though we all tend to obsess when owning these and given it's new to you, i would replace all maint items as a matter of course. but thats me. so, this may seem a bit contradictory(?!)

bottom line is.. plugs/coils are relatively cheap ( not bbi's coils lol ) but they're the best,.. i've heard..) and i'f you're in there anyway?, sure.. why not. but if the car isn't indicating you have issues with spark?.. i'd say *next*.. and congrats on the car. we've recently interacted in another forum i believe(?).. anyway.. enjoy the car!

 

If you are going to remove the bumper cover to remove the exhaust, it will allow for inspection of the coils and plugs. There is a thread about modified cars going through plugs quicker, but if stock, it seems like 30,000 miles is a good interval. To remove the exhaust, you don't have to pull the bumper cover. I can do mine without removing the cover in about 25-30 mins (removal).

 

There used to be a plug replacement schedule based on time. I do not know if this is still in effect or not.

Best check with your local Porsche dealer service department for an up to date service schedule.

If plugs are still required (by Porsche) to be changed after so many years and if the plugs have been in service for that long then change them.