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Clearly Kia are happy that the plugs used last a lot longer than the ones BMW use do.

I have Iridium spark plugs in my Kawasaki Versys & were still as good as new after 20K miles. And a good job given the (inset expletive) they are to get out..😂

Remember car does not stress plugs anywhere near as much as a bike. Lower compression, less revs. etc (y)

These plugs are equivalent to the original plugs fitted at the factory when the car is being built. Usually a 0.6mm Iridium alloy centre electrode matched to a platinum chipped ground electrode for optimum service life without compromising performance. Service life can be as much as 120,000 miles for this plug type. Denso makes the OE parts for many vehicle manufacturers and therefore their aftermarket OE Iridium plugs are the best option to replace the original factory fitted plugs (where available). If a Denso OE Iridium plug is fitted as standard we would not recommend fitting any alternative part (unless the engine is heavily modified). Most OE Iridium plugs are available from stock.
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