16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHAftermarket ignition coils
Leading reported evidence
Check coil pack heat shields
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Leading evidence: 'Check coil pack heat shields' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check coil pack heat shields' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
16 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi everyone. How do you guys feel about aftermarket ignition coils for my 2004 911 with 135+k ? I think it has the original coils in it. Let me get some insight on these things.
I bought �upgraded 997� coils from FCP and they are made by STI. It seems Beru doesn�t make them anymore or in limited numbers. They look good and fit just like stock. And they are working well for the last 1000 miles.
Those are nice, but they are made in China too. I just don't see the point. I pleasure drive, don't track my car, why pay for that cost when they are pretty much made in the same place. That's just me.
Yes some still are. I'm just not willing to pay for them . I'm cheap what can I tell ya. It's not that coils are cheaply made, it's that they are made cheaper in Mexico and China, the labor. All those name brand coils still have to have awesome quality control otherwise there would be millions of these parts being returned or replaced. Just like tires, gotta have very high QC even in China.
Most coils are said to last 30,000 to 100,000 miles. Of course it depends on your driving.
My coils seem to be original like everything else on the 996. I got it this past June with 135,000 + on it. So it's time to change a ton of stuff.
Well,,, 996 coil paks aren't your average modern day coil paks. Porsche has always been on the cutting edge of automotive materials. The lightest, most durable, highest performance,etc,, Porsche has developed it. Sometimes they miss the mark.....
The Phenolic resin baklite type of material used in early 996 coil paks are one of those materials. Problem is after 100's of heat cycles and fast cool downs like rain water splash, car wash, etc, cause the material to crack. The heat shields were there to help shield' the coils but seem to not be 100%sufficient at stopping heat cycle cracks..
Most of the time these cracks don't seem to be a problem till they get wet and short out causing bad misfires. Then after the hot engine is shut down and cools/dries off for a few hours the coil paks dry out and engine runs fine/smooth once again,,, till the coils get wet again. If the coolant reservoir is leaking or overflowing the overflow will land directly on the coils, if coils are cracked the engine will misfire badly.
So, moral of the story, these early 996 coil paks need to be upgraded on most all early 996 cars that could get wet. If you only drive/race in the dry and never get water splashed on coils from rain/snow/car wash then you probably don't need upgraded coils...
The upgraded coils for a 996 are the newer 997 'thick' coils that need the longer screws, they have a better crack resistance to heat cycles...
jmho
But how do you know? Your car is like 22 years old and probably had more than 6-7 owners by now. Heck, you could have a factory replacement M96.03 since the Mk2 had a higher than average failure rate. Why not post some pictures of the engine serial number and pictures of the coil packs. Lots of us here can tell immediately if they're the original factory coil packs. How? By the markings.
My 911 had 3 owners all in one family. Not many things have been done . I have some records and the IMS was done years back. It is my first 911 and I absolutely love it. I've done the water pump thermostat all pulleys rebuilt the alternator and a bunch of other stuff.
Anyway I thank all uguys for all the help.
And no umbrella. Here's a picture of a coil.
My '04 996 coil
