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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Thu, Dec-23-2010, 05:59:05 PM   #1
my_slO_srt
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Default whats best spark plugs for m3 e46

i cant find a forum all i heard was the 5309 densio was good ?
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Old Thu, Dec-23-2010, 06:16:57 PM   #2
Shimmy23
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Default Re: whats best spark plugs for m3 e46??

I see no point in varying from the stock plugs, unless your are F/I'd
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Old Thu, Dec-23-2010, 06:30:14 PM   #3
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Default Re: whats best spark plugs for m3 e46??

OEM copper ones ftw
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Old Thu, Dec-23-2010, 06:31:13 PM   #4
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Default Re: whats best spark plugs for m3 e46??

Stock
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Old Thu, Dec-23-2010, 06:32:27 PM   #5
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Default Re: whats best spark plugs for m3 e46??

NGK Laser Platinum DCPR8EKP stock number is 7415. these are same as OEM but half the cost because you can get them from advance auto parts.
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Old Thu, Dec-23-2010, 06:54:53 PM   #6
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Default Re: whats best spark plugs for m3 e46??

whats the oem number?
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Old Thu, Dec-23-2010, 07:55:25 PM   #7
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Default Re: whats best spark plugs for m3 e46??

platinum? no way. OEM? no way.


This is what I run for years with zero issues and max performance. Do some research on iridium. Its about 7 doller per plug too!

NGK Iridium IX Spark Plugs
Item#: DCPR9EIX
Only Fits: 01-06 M3; Gap .032 * 1-Step Colder Heat-Range Number *
Note: .032 Gap; 12mm, 3/4in Reach, 5/8in Hex; Resistor; ISO 9
Sold Individually
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Old Thu, Dec-23-2010, 07:59:03 PM   #8
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Default Re: whats best spark plugs for m3 e46??

Quote:
Originally Posted by bagzman View Post
platinum? no way. OEM? no way.


This is what I run for years with zero issues and max performance. Do some research on iridium. Its about 7 doller per plug too!

NGK Iridium IX Spark Plugs
Item#: DCPR9EIX
Only Fits: 01-06 M3; Gap .032 * 1-Step Colder Heat-Range Number *
Note: .032 Gap; 12mm, 3/4in Reach, 5/8in Hex; Resistor; ISO 9
Sold Individually
I remember researching these. Still not beneficial on a stock car
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Old Thu, Dec-23-2010, 08:05:06 PM   #9
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Default Re: whats best spark plugs for m3 e46??

my experience:
Bosch OEM replacements + Bosch OEM coils replacements = caused miss-fires.
NGK OEM replacements + Bremi OEM coils replacements = running great.
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Old Thu, Dec-23-2010, 08:09:37 PM   #10
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Default Re: whats best spark plugs for m3 e46??

The material's resistance to arc erosion makes iridium alloys ideal for electrical contacts and it is the most corrosion resistant metal even at 2000 degrees C.

At 7 bux a plug, you really can't do better.
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Discussing whats best spark plugs for m3 e46 in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)