My coil connectors have a slot at the bottom that engages with a tab on the coil. The original slots were offset from the center and they matched the coils on the engine. New coils have a tab that is dead center. Dealer is scratching his head. Even with the correct VIN the centered tab coils is what the parts book calls (and they don't have the offset type), but they won't fit my connectors without modifying either the connector or the coil. What gives? Is there any difference? Why are mine offset? '06 530 Xi.
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Yes, I actually have a spare set for my E46 330i that I was thinking about using to test this, but also a bit put off by having to break these tabs off in order to do this.
I also heard from the dealer that electronically the two designs are the same so I filed down the centered tab on the coilpack as far as I could but that didn't allow the connector to seat. So I filed a new slot into the coil connector shell to match the new coilpack using a jewelers needle file. Now it fits and works OK. Just wish I didn't have to booger up the parts to make them fit.
My E90 330i is a 2005 model, so has the same odd coil packs that yours has, have no idea why BMW used these only to later change them to the same type that was used on the older M54 motors. The part numbers should indicate the change, so on a site like RealOEM it should show which is correct for you car. However, I do recall speaking to a local BMW specialist and he suggested that apart from the tab location, electronically these coil packs are actually exactly the same, so theoretically one could just nip those tabs off and they should fit and work. Well, theoretically, I haven't tested it myself.