Top Issue- 02-05 Ford Thunderbird Ignition Coils COP


Active Member
Nov 18, 2012
Thunderbird Year
2002-2005 Ford Thunderbird and Lincoln LS have a widely known issue with Ignition coils going bad and also fouling out spark plugs causing misfires
. Just by replacing these components, you may be able to bring new life to your engine!

At the time of this post, 59.30 for an entire set of Ignition Coils! Can't beat that! If you have a 2002-2005 Ford Thunderbird I would buy these just to have on hand because of the history of these going bad! Don't forget to order 8 spark plugs too because the coils foul them out!

UPDATE April 2020
Here is the link for the updated part as of 04/2020 that fits better with the valve cover- previously everyone was ordering parts galaxy which works, but is a tight fit.

There is a post below with installation instructions- https://forums.fordthunderbirdforum...hunderbird-ignition-coils-cop.5040/post-35040

Important- You may also have a problem with your cowl seal, wiper seal or valve cover gasket, which is causing the coils to fail! You can read more about that in this post. If you have coils problems after a few days/weeks/months it's likely not the coil, but an additional problem.

What you need to buy
1- Ignition Coils (Amazon Purchase Link)
2- 8 Spark Plugs (Amazon Purchase Link)
3- Dielectric grease (Amazon Purchase Link)
4- Valve Cover Gasket (Amazon Purchase Link) (EBay Purchase Link) (optional but highly recommended while doing the job)
5- If you need the deep & shallow 7mm sockets, here is a pack with both (Amazon Purchase Link) Also, this 1/4" swivel socket will help you get to the one hard to reach. Note: 1/4" drive makes the job easier!
6- This type 7mm wrench will make the job easier

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There are several other issues that cause the coils to short out. One is the poor seal on the drivers side of the wind shield. Water seeps under the seal on top of the aluminun wind shield motor and on to the valve cover. The neck on the valve cover is held in place with a rubber seal. Oil also seeps out around the filler neck over a period of time. The long narrow plastic covers over the coils also flex from heat and the oil seeps in. If you clean the surfaces along the top and both ends of the cover with a cleaner that leaves no residue. Alcohol will work. Then apply a thin beed along the top edge and the front and back edges of the covers this will prevent the oil and water from seeping in. The covers have no gaskets they relay on several layers of thin plastic to keep the oil and water out.
Go Figure.