BimmerFest BMW Forum banner
1 - 20 of 32 Posts

· Registered
Joined
·
3 Posts
Discussion Starter · #1 ·
My mechanic, besides wanting to charge us way too much for a simple repair says that we need to replace ALL the Ignition Coils rather than identify the coil(s) that is faulty. His rationale: if one or more has gone bad, they are all not far behind. I plan to do this work myself, but do I really need to replace all of them?
 

· 1SCK530
Joined
·
256 Posts
I have replace singular Coils in the past. But have always gone back to replace all eventually anyways.... Depending on the mileage that you car has it might be time to change them anyways.
But simple answer is yes you can change one at a time for financial reason or whatever.
 

· Freude am Fahren
Joined
·
6,455 Posts
You're really better off replacing a set as a set, rather than replacing one, then the next, and two months later another one, et cetera, ad nauseam, until you've done them all and it's six months down the road.
 

· Registered
Joined
·
15,796 Posts
Per my cousin bmw guru, ignition coil is different than tires. Let's say one tire goes bad, then chances are the other 3 are also bad, so replace all 4.

But ignition coil is different. It may last 60K, 100K or 200K.
Plus when one coil goes bad, you have misfire but it will not leave you stranded. But you will have a check engine light.

So you can replace one ignition coil at a time.
Use only BMW or Bremi brand.
 

· Registered
Joined
·
5,293 Posts
Ive always replaced mine one at a time, I did one in a Toyota back in january and none have followed since. Id say if you have the money, then sure go ahead and do them all at once. But if not, dont fix what aint broke..:dunno:
 

· Registered
Joined
·
15,796 Posts
Ive always replaced mine one at a time, I did one in a Toyota back in january and none have followed since. Id say if you have the money, then sure go ahead and do them all at once. But if not, dont fix what aint broke..:dunno:
Good point.

On the other hand, if one is broken, replace it.

Then find a good used coil and keep it in the trunk for long trips just in case. Replacing the coil (in the middle of nowhere) is a piece of cake.
 

· Registered
Joined
·
3 Posts
Discussion Starter · #11 ·
Thanks everyone!

Based on your feedback, I'll replace them all. MANY THANKS!!!!!

One more question. They come with both and without spark plug connectors. Can I just use the connectors on my current coils (2000 5 series wagon)
 

· Registered
Joined
·
15,796 Posts
Based on your feedback, I'll replace them all. MANY THANKS!!!!!

One more question. They come with both and without spark plug connectors. Can I just use the connectors on my current coils (2000 5 series wagon)
By the time the coil is bad, the BOOT is probably cracked.
The BOOT is about $6 each.
Do them all coils + boots.
 

· Registered
Joined
·
3 Posts
Discussion Starter · #13 ·
Spark Plug Connector

It looks like the spark plug connectors alone are $26 each additional (source: pelican parts). That's a lot - 156 more if I really don't need them. Does anyone else have experience with this issue?
 

· Registered
Joined
·
1,608 Posts
It looks like the spark plug connectors alone are $26 each additional (source: pelican parts). That's a lot - 156 more if I really don't need them. Does anyone else have experience with this issue?
Here is our kit form with plugs
http://www.oembimmerparts.com/catalog/item/4168850/4825786.htm

Here are the coils alone.
http://www.oembimmerparts.com/catalog/item/4168850/4086414.htm

And the Plug Connectors
http://www.oembimmerparts.com/catalog/item/4168850/4086416.htm

All assuming your car was built before 08/2002
 

· Registered
Joined
·
4,987 Posts
I'm not sure at what date this happened--but BMW recalled a lot of the Bremi coils--they were recalled and replaced with Bosh on my car---Strange the Bremi coils were replaced about a month after I bought her new--they broke down--then about 40k miles later--when getting a free oil change--they informed me that while there--they replaced the coils with new Bosch units at no charge--this was for an 03 model--this might also fit some 02 models as well.
Anyone have the connectors for the Bosch coil--or is it the same as the Bremi--they sure look diff from the pic's posted--car now has about 110 miles on the latest change of coils--still in use
 

· Thebizzy.com
Joined
·
6,524 Posts
Would you replace 1 spark plug at a time? Hey is anyone here using the high performance coils?? Those things are pricey but I'm wondering if they are worth it?
 

· Registered
Joined
·
15,796 Posts
Would you replace 1 spark plug at a time?
I agree to disagree...:)

Spark plugs and tires kind of wear equally, so all 4 tires and all 6 spark plugs should be replaced at the same time.

Ignition coil can fail any time, while I agree that when one coil goes bad, all 6 should be done, but cost is an issue. Plus ignition is kind of like headlight bulb: when one bulb goes out, you don't necessarily have to replace the opposite HL bulb, although that may not be far behind.

There is right or wrong.

No budget: replace only the bad coil.
If you are rich: replace all 6....sweet and simple!
 

· Thebizzy.com
Joined
·
6,524 Posts
Nobody that owns a bimmer replaces 1 bulb at a time. I see your point however we'll continue to disagree. Though I think most will agree all should be changed if at all possible.
 
1 - 20 of 32 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top