5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
Literally, within a week of having a coil replaced, the car will start missing in low gears and a few days later the "Service Engine Soon" light will come on. In a few cases, when the car is missing, it will flash at me.
Mechanic says I need to replace the third coil that has gone bad, but I am thinking there is something going on to cause the coils to fail. Each time it is a different coil and this time the coil is in the other bank.
Yes - the coils are failing. The mechanic runs the diagnostics, gets the error, takes the coil that the computer says is failing, switches it out, then retests it to make sure the error follow the coil that was identified as failed. It is a 6 speed. Does not miss when idling.
124,000. Just had all the plugs replace and all service was up to date as of late last summer. The first coil failed in November. Second one in June. And, less than a week later, the third. I sure hope I am not out there again next week replacing the fourth.
Mechanic says there were no other errors - voltage errors or anything that might contribute to causing coils to fail.
I guess that these coils are all probably the original coil packs, made in the same batch and having done pretty much the same work in the same environment, they could theoretically fail at roughly the same time, but its unusual. Hang onto the old ones in case they turn out not to be bad. Have any of the new coil packs failed as yet?
Nope - no new ones, they are all fine. Yes, I guess I'm just "lucky" and they all were the original coil packs when this all started. They are Bremi but he says that they are not the type that were recalled - the ones where the boot and the coil were all one unit.
My mechanic's theory is just replace as they go bad. He says that dealerships will tell you when one goes they all have to be replaced - basically, just for their convenience. So that "non-mechanics" like myself are not complaining that they were just there for the same problem and why is it happening again?
I posted this just in case someone out there had experience the same thing and found an underlying other thing that was causing the coils to fail. But it doesn't see like that is the case. Also was wondering if someone had the same problem and just decided to replace them all and had results. I'm tired of driving out there! He isn't very close to home, but had to can my BMW mechanic of many years when ownership went to the kids and they were pulling shenanigans. Several of my friends caught them in out and out lies about what they did to the car, etc.
If you can handle a socket and screwdriver these coil packs are easy to change, provided you know which one is faulty. It may be worth getting hold of a spare coil pack and change them your self.
Remove the engine cover
remove the two rocker cover blanks
remove the two screws on the rocker covers
undo the two nuts retaining the coil pack
release the spring clip that hold the lead to the coil pack
the coil pack then simply pulls straigh off the spark plug whilst sperating from the wiring
Reverse the process to reassemble.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.