Bad new Bosch Replacement coils?
 

I have a 2007 e70 4.8l x5 It developed a miss on cylinder 5.
I put a new Bosch coil part #0221504470 and replaced the plug on cylinder 5 The miss continued.
I swapped and new coil with another original coil from cylinder 6 and the problem follows the new coil or the bad coil but not the other original coils.
I ordered two more new bosch coils #0221504470 from trusted RM european and they too show misses where they are put.
the original part number is different a bosch #0221504100 but at least aftermarket the 0221504470 is the only offered new replacement.
Seems to me my X5 wants a #0221504100 used from ebay?
Do all the coils have to be the same #? or what?

Bad new Bosch Replacement coils?
 

Check the depth of the boot on both of them, I haven’t checked the part numbers but I’m wondering if the electrode is deeper in the boot on the 70 vs the 100?

Thanks for the reply the new coils are the same length and I have made sure I have pushed down fully in place. Problem follows one original bad coil and all three attempted new replacements. I have tried moving the coils multiple times and it comfirms each time.

Same length top to bottom or same depth to the electrode inside the boot from the boot tip?

And, to confirm, the miss follows the new coil, correct? But if you put an old coil on 5, it no longer misses? Did I get that right?

I’ll dig in to both of those part numbers when I get home tonight and see if I can figure anything out [emoji106]

Oh, last thought, a used coil isn’t a bad thing, coils tend to last a VERY long time. So if you do end up grabbing a used one off eBay or other, you’ll probably be good to go.

I’ve seen cools go well over 200k miles with no issues.

What specific kind of spark plug did you install on cylinder 5?


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Strong Theory Bosch Coils made in Solvenia are bad knock offs
 

Just talked to a private BMW mechanic I know, I tell him about how it seems three new aftermarket bosch coils are bad as is the one original from my X5. He asked do they say made in Germany or made in Solvenia on them. And then tells me he bought 6 of the made in Solvenia ones and they were all bad!! Comment makes DIY even harder when you can't depend on the new parts to be good

Bad new Bosch Replacement coils?
 

That is amazing! You should definitely play the lottery tonight!

Glad you found the issue [emoji106]

Something tells me it’s not the coil. Post what you find as a solution.


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I am not dum ... the problem follows the coils period
 

the only way it could not be the coils is if the coils had to be introduced to the car and or they had to be a matched set. the bmw mechanic telling me he also bought 6 of same bosch coils from I do not know who labeled made in solvenia and they were all bad confirms. I have sent bosch a email asking about the problem. I will post here how it works out

What spark plug did you install on 5?


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3rd time.


What spark plugs did you install?






Also....


Lots of counterfeit parts...cheap crap, copying Bosch parts, Bosch "made in" ingravings/moldings...even copies of Bosch packaging. Before yoiu decide Bosch is at fault, consider it might not be theirs. Im sure youve already launched into Bosch with the evidence from a trusted indy. But maybe he ddnt really get genuine bosch.


http://www.bosch-aa.com.cn/en/intern...terfeit_1.html






Oh, RM may not be aware. Or they might.



Its a problem....

Bad new Bosch Replacement coils?
 

I think he installed only one plug. I also have a Bosch made Slovenia ignition coil from Amazon. Worked for me during diagnosis of other issues.


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Need OP to clarify. I did see he exchanged #5, but still wondering what plugs are in the car.



Not to be argumentative, how do YOU know it really was Bosch made? :dunno:


Just saying....

Good question. Came from Amazon itself as the seller. I’m guessing a larger verified supplier? But just an assumption. I really don’t know. You are right.


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Got it working using original 0221 504 100
 

I also have a 2004 330ci E46 which turns out has the same original 0221 504 100 bosch made in germany coils. Which by the way have a silver cylinder section unlike the all black new ones 0221 504 470 made in Solvenia which do not work.

I swapped in a 0221 504 100 coil from my e46 to the e70 and everything is good ... no DME codes. By the way the one bad coil caused these three DME codes 2E28 29CC 29D1.

I went online and checked via Amazon the 0221 504 470 are the current offered part number for both my E46 and E70 three of which failed for me.
First one was from seller bosch on amazon, next two via RMEuropean whom I trust.

I have now ordered two used 0221 504 100 ones via ebay. I will now go stick a 0221 504 470 (new bad one) in my E46 and I expect it to also fail (miss) there too. I have a email into bosch corporate, I will post again as I learn more. Whew the multiple bad new coils caused me a good bit of trouble I as I assumed they could not all be bad. I should have swapped coils in diagnosis early. The three fault codes also had be worrying my problem was more than just one bad coil.

More ... New coils work in my E46 330i but NOT in my E70 n62tu X5
 

New 02221 504 470 made in solvenia coil works in my E46 330i but NOT in my E70 n62tu X5. Yep that X5 is always a challenge.

My 2007 E70 4.8l X5 has a production date of 11/2006.
It last saw a BMW seller ship service via prior owner in 2014 so one might think it's software was last updated then.

my X5 has 140K miles on it 40K of which I have put on it in last five years.
My goal is to have the X5 last five more years without big $$$ problem putting maybe 5000 miles a year on it. It is my boat tow vehicle otherwise I mostly use my E46.

So E46 likes the new coils the E70 does not!

Also to unicorn the spark plug I replaced on cylinder 5 in my BMW is a Autolite APP 5224 Double Platinum. It was much cheaper than bosch oem ones and given I only ask 50K miles it seemed better to use that. So I see no misses now my conclusion the autolites are fine .... I love to find the truh. Will report back with what bosch corporate says

Glad you found the issue. Interesting.


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I am super glad I found the issue, it turned out to be what it should have been, but first I had to learn I could buy three new coils and they would all be no good for the x5. That tricked me and combined with the three miss codes rather than one I worried it could be valve train or some hidden vacumn leak. I do fear taking the x5 to anyone especially the stealerships ... they love to point out the most expensive set of things that it sort of needs, they would never just replace a coil and be done. Then frankly I don't doubt they could sabotage the car.

AFAIK, "Bosch" is NOT the OEM fror the plugs. Believe it is NGK


Many people have used 'upgraded' plugs to their detriment with BMWs. They can be very fickle, especially on turbos. Just FYI


Be interested to hear what the truth is!

Bosch is the OEM plug for virtually every other BMW model, I'd be surprised if it wasn't for the X5 as well.

One thing I've learned from the 5 BMW's I've had over the years, when it comes to ignition issues, never replace single parts and always use OEM. Bad plug or coil, means I automatically replace every plug or coil in the vehicle. Can't say I've ever had an issue with receiving fake OEM parts though. And I order from the cheapest source there is, Rockauto.com.

Attachment 76040 These were the original Bosch plugs with the BMW stamp from my 4.8i.


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When I worked the back service counter at the dealer, we would get cars in for service with Bosch plugs from the factory. This was going back to E39, E38, E53 chassis era. At that time the ETK gave the parts team both options of NGK or Bosch (it still does actually). We would just ask the tech what he pulled out and gave the replacement for the same plug brand. Over time, people just started requesting NGK over the Bosch.

BOSCH coils from Slovenia are absolute SHIT. I too ordered from RockAuto, the damn car could barely idle. I replaced with all ELDOR coils and ZERO issues. I am going to make a separate thread about this, enough is enough.

As I said, I wasn't sure.

HOWEVER, NGK was the OEM for quite a few BMW motors. (I think especially pre 2009).

Wholeheartedly agree with the advice you use exact OE or OEM replacements on plugs. It would be a super odd situation where I replace only one. MORE important than the same 'name' on the plug, is the design and temp ratings. Buying a 'upgraded' plug based on hype and marketing can lead to issues, as we have seen.

Significant counterfeit issues with MAF sensors in some BMWs.

Bosch coils has been the gold standard for a LOT of enthusiast well after BMW made the move from them with coils. Eldor is currently, and has been for a few years, the OE (on certain not all applications) after many many revised Bosch coils through BMW. And current stock show BMW/Eldor being "made in Turkey".

one autolite spark plug is working fine no misses.
 

I have the original Bosch plug should it develop a miss. My conclusion Autolite is fine, now likely only good for 50k miles not 100k.
Sorry guys do not see the problem with a odd plug or autolite. I like doing blind taste tests .... people will often pick the cheaper store brand Coke vs. Coke a Cola , go figure

The issue on this thread is all about new coils not working in E70 4.8l X5 that do work in E46 3.2 liter 330i. There appears to be a manufacturing issue with new coils that do not work for all the BMW types they are suppose to. Bad news to think a new coil should work and it does not.

Haven't worked on enough BMW's then. It's great that you found your issue, but for future reference, BMW's are VERY contrary about plugs that aren't OEM. I've chased enough misfires in my day after replacing plugs and swapping coils around that it's just a no mess around issue with me. Makes you want to burn the car down when you've spent 3 days chasing misfires, only to find out it's the brand new plugs you put in in the first place.

The One autolite stays there until it fails
 

lets

My 2007 X5 4.8l does not have turbos .... thank God!
The plugs were replaced by prior owner at about 95k five years ago ... they are Bosch not sure if that was a dealership that pt those in. One autolite is working fine and until it developes a miss on cylinder five that autolite will stay there. Should the one autolite fail I will report it here. I hope I have no big issues with X5 and it hangs in there until 200k ... that will be then be about 2027 and it will be time for something else. :rofl:

FYI bosch has not returned my email.