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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 06-06-2002, 05:56 PM   #1
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Question will denso iridium plugs work on my e46?what are the factry plugs?

It says that they have an ik20 that will work. Is denso iridium the same thing as "ngk"?
These arent denso iridiums are they:http://catalog.****************/defau...?selectmake=BM
Just looking for some advice
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Old 06-06-2002, 11:15 PM   #2
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NGK R5's are the Stock plugs
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Old 06-06-2002, 11:38 PM   #3
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Re: will denso iridium plugs work on my e46?what are the factry plugs?

Stock plug is NGK BKR8EQUP, they are platinum tipped for 100K miles and have a recessed electrode so that the spark burns off surface carbon on the insulator and prevents fouling. BM also shows a special socket tool to remove them - 88 88 6 121 171 - I dont know why. No reason to change them out.
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Old 06-07-2002, 02:16 AM   #4
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I've got Denso Iridium spark plugs in my car. I don't notice any performance gain or maybe is too little. However, I got about 30km more per tank of gas.
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Old 06-07-2002, 04:37 PM   #5
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The study I saw show Denso's are better

The diff is that Denso's have a extremely low misfire rate compared to NGK Plat 4 and other top brands and I mean extreme. The Denso's from 1000-6000 rpm is completely flatline at the bottom of the graph like nil showing while other are on a steap incline up as RPM increases. This is why you would get better gas mileage and performance from Denso's. Misfires are suposed to be normal with sparkplugs so the less you have the better.
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