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If you have E-Sys you don't need bimmercode or any other coding tools. They all do the same thing. You will want to go LED high beams and fogs if you have them as well, you won't be satisfied with halogens after seeing the improvement with the low beams. I went LED for the brake and rear turn signals as well, in part after seeing problems some have had with connectors over heating and burning out. The 90% reduction in current draw with LED should prevent that.
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