I have a 2008 328xi and am looking to do plugs and coils. I see that the Delphi coils 12138616153 were originally for the turbo N54 engine but Turner says they're now approved for use in the N52 as well as of March 2015. I can buy these coils for about $40 a pop but I also noticed that the old Bosch coils are actually much cheaper now. https://www.fcpeuro.com/products/bmw...-12138616153-1 https://www.fcpeuro.com/products/bmw...sch-0221504470 Are there any benefits of the Delphi coils that would have caused BMW to switch suppliers? They look a bit more solid in construction but I don't know if it would be worth the added cost.