I have just taken my 3.2 Signum for it's 4th service where the spark plugs are changed. I had bought some NGK Iridium X1 plugs part number BKR6EIX-11. They would not fit the plugs saying they are wrong -size and plug all together. They have fitted me the normal NGK BKR5EQUPA. The place I bought the Iridium plugs from are adamant that they are correct. Vx are adamant they are not!!!!
They are telling me that the Iridium plugs are longer- you'd need a nanometer to tell. They also tell me that there is very little tolerance as the plug will hit the piston or valve!
I really want these plugs in but the NGK site is pants as are most others.
Whilst here moaning I must congratulate Marehay Garage at Ripley Derbys for excellent service. They spent amany hours on this. Charged me no more for all the messing around- £180, and have offered to fit the plugs when I have found out 100 % that they fit or the correct ones, for free.I believe this is quite a job! A courtesy car only needs 3 days notice, unlike 8 weeks at Reg Vardy and the whole service is very good!!!!!!!!!!!
Please I need a 100% definite answer or I'll have to scrap the idea! Are there any other Iridium plugs with a part number please??