Thread: Spark Plug Questions
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      06-02-2019, 09:12 PM   #12
rennwerkes
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Drives: 2014 335i, 2013 135i, 1999 Z3M
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Quote:
Originally Posted by Gangplank View Post
* Spark plugs: not sure about consensus but...

n55 @ 60k, unless tuned then 45k mi.
n54 @ 45k, if tuned? .
Just wanted to double check.
Saw some comments about changing at 30k.
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