Bought these to service my E90, and it was probably one of the easiest jobs to do. I bought the accompanied 14mm Thin Walled Socket, which is a MUST HAVE to do this job. One of the coils came with a busted out silica bag (shipped with to prevent moisture)... so I spent an hour digging the beads and gunk out of one of the coils, but it was all good. When you go to do the job, instead of using long-nosed pliers to pull the thin-walled socket off of the new spark plug: plug the extension into the socket and wrap the 2 with a thin layer of electrical tape. Doing this you can pull the socket off of the new plugs without issue. The seal that is created is pretty strong. I think the quality of the service kit was great. The previous owner installed quality products, but these are great replacements that inspire confidence on a tuned car. I don't have to worry about this setup for quite some time, now off to deal with some fuel injector problems.

I’ve ordered so many kits and never been disappointed. This one, in particular, just such an easy solution. I do plugs and coils appx 2yrs/30k miles x 4 bmw wagons but with the lifetime replacement through FCP, you only pay once. As we all know, diligent maintenance saves us from the tow truck. And this is an easy diy; even I can do it with the right tool (thin wall socket for the plugs: buy it when you order).

Not sure how long the previous plugs & could have been in the car, but the difference this made to how smooth the car now runs is incredible.

After researching MANY forums on N54 Coil packs and plugs , I found you cannot beat this kit ESPECIALLY, Being all parts purchased from FCP Euro come with a lifetime warranty for as long as you own your car.

No more misfire all good on my 335i N54 stage 1+ MHD.

I was sent the wrong Coils.. (Bosch ; instead of Delphi) Called FCP Euro and they made an order to send me correct plugs the next day We all make Mistakes... Thank You for the Service.

Fixed my misfire excellent product Packaging excellent

This was my first purchase from FCP. Everything arrived when they said it would. I installed the plugs and coils now my car idles and pulls like a champ! No matter how hard I push it now there is No more codes for misfires and super knocking. Definitely would recommend FCP and this ignition service kit

15 psi no misfire very good

Very good quality i run by 50 psi ( gap 0.022 ) and no missfire again i recommend it