Make sure he's around and shows you the ropes. This is a very basic thing to do, and asking, "which coil" tells me that you have not spent much time under the hood.ya sorry it was a dumb question lol but thank you for the informative repsonse lol! i will check now. i have a code scanner already cause my friend is usually the one who does the work on my car! thanks
On behalf of the forum, thank you. This is the type of response we all need every now and then :thumbup:If you gotta ask...
Coils provide the spark for the spark plugs. Back in the days of old, right after the first wheel was invented, they used one coil, and a distributor to send sparks to each of the spark plugs. Now they use a coil for each cylinder. Works way better. More expensive, but waaaay better. Did I say it was better? I just wanted to mention that before I forgot.
Your engine has a cover along the top that has giant BMW molded into it. There are small round covers that you pry off with a screwdriver to expose a 10mm nut underneath. Two covers, two nuts -- you might find that the filter for the Cabin Air is in the way, and you can remove this pretty easily if you need to. You will have to remove the air filter housing at the base of the windshield to replace the spark plugs, but not to test the coil -- which I am getting to.
Remove the cover on the top of the engine and you will see a row of ignition coils smiling up at you. Each coil is held on by two 10mm nuts. #1 is the front, #6 is in the back, the others are in order. Count back to #3 and remove the coil, if you want to inspect the plug, you can, but for now just leave it alone unless it is wobbliing in its hole. Also remove the coil on the front, #1 Cylinder, and put it on the #3 that you took off, and put the #3 onto the #1. You do not have to put the cover back on.
Drive the car for a day or two until the CHECK light comes back on, and read the codes again to see where the misfire is. AutoZone will sell you a code reader for less than the price you would pay the dealership to extract codes twice, and you can use the reader on any car made for the 1996 model year or after. AutoZone also has a tool loaner program where they used to let you borrow the scan tool, but I can't say with any certainty that they still do this.
I have my own scan tool, and I find it to be as important to my tool collection as my allen keys and sockets. I don't see how anybody can even own a car today and not have a scan tool. Well. I don't see how anybody can own a car and a box full of tools that doesn't have a scan tool among them, and pretend to actually fix anything on the car.
Since you had to ask, which coils, I'm inclined to suggest you need help.