blackrose

Hi friends, My dealership gave me a crazy quote to do replace my ignition coils and spark plugs today($1400) So I asked them for the part number to source them out and replace them. They gave me the part number as follows:
Part # 12120037244 - Spark Plug
Part # 12135A06753 - Ignition Coil
Engine has 189,000KM on it. 2008 535XI E61

What is my best option for spark plugs/ignition coil combination? Can someone help me with the perfect fit? Thanks in advance

twh

Unless you have OBD codes, you don't need new coils.
New plugs fine -- get them from Rockauto. BOSCH ZGR6STE2 are original plugs and 8.48 USD each.

blackrose

Thanks for the insight. I had fault codes and check engine light came on 5 out of 6 banks misfiring. I plan to pickup an OBDII tool tomorrow as well.

What would you recommend for ignition coils? Thanks

seanjordan20

I would get Eldor coils from FCPEuro.

habbyguy

Get new plugs (easy and cheap). The odds that you've got 5 out of 6 bad plugs is virtually zero. Those things just don't fail like that - if you have one misfiring cylinder, and the problem follows that coil to another cylinder during troubleshooting, then it makes sense to swap it. Otherwise, your coils should outlast the car - there are no moving parts, and the failure rate of a coil that's been working for over a decade is much better than a new coil for the first months / year, at least.

blackrose

So If I get you correctly, You're saying to get new spark plugs and swap all the old ones. the run the vehicle and see is the issue persists?

Also on a side note, I saw these coils on Rockauto.com. Any thoughts on them? Thanks
https://www.rockauto.com/en/moreinfo...=3372&jsn=3372

seanjordan20

Yes that is what he's saying. He is correct with the likelihood of coils going bad. These cars a finicky with the type of coils you put on them. Delphi does not last long. Bosch were mostly put in them then Delphi and Eldor. If you are just going to replace them anyway stick with Bosch or Eldor and you must replace all 6. Do not mix and match. I posted a link in my post above to the Eldor coils from FCP because they give a lifetime warranty on everything they sale even oil.

I would say this. The likely hood of 5 cylinders going bad at the same time is near zero. You could be looking at another issue all together like tube gaskets dumping oil on the plugs.

blackrose

Thank you very much for your advice.