NGK IRIDIUM BKR6EIX for R52 Cabrio S

Hello all

I have a r52 cabrio S, last week I changed the plugs to NGK IRIDIUM
BKR6EIX. I drove the high way about 160 KPH the check engine light went on, I thought strait that its something with the plugs. I connected a computer and I saw I'm getting a front lambda error. so I cleared all the fault codes and drove a bit in the city for few days, everything was ok. Than I went again to the high way 160 Kph the check engine light was on again, so this time I bought original plugs from BMW and now no more check engine light and no more error. I also change the Ignition Wires to new one from NGK.

So the cars don't like NGK IRIDIUM BKR6EIX ?

Thanks
Marry Christmas