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Spark Plugs

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Can anyone advise what are the correct Bosh plugs, per the factory manual for the 2003, 2.7 Boxster engine? I read many opinions about what different people like, but no one seems to specify what the factory specs call for.


Edited by drobinson117

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On 4/11/2011 at 10:01 AM, Loren said:

999.170.207.91 Spark Plug (14FGR 6KQU)

Loren, is this still the recommended plug for the 03-04 2.7? I ask because after I purchased my Boxster I had some much needed service work done and they installed NGK plugs. I'm going to change out the coils (slight misfire on 2 cylinders) and I'm thinking I should install the Beru plugs instead. Am I wrong to do this?


Mine is a September 2004 2.7 Tip (last month of production).

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Yes, 999.170.207.91 Spark Plug (14FGR 6KQU) is still the correct Porsche part number.

Bosch, Beru, NGK should all work as long as they are the same size, thread depth, and heat range.

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24 minutes ago, Lawrence cao said:

Is there a difference between FGR6KQE and FGR6KQU? 


can i use FGR6KQE for my 2003 boxster 2.7L?




The correct spark pl99917020791ug for a 2003 Boxster (2.7 liter) is 14FGR 6KQU.

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8 minutes ago, Loren said:




The correct spark pl99917020791ug for a 2003 Boxster (2.7 liter) is 14FGR 6KQU.

Is seems that Bosch FGR6KE (7413) is the equivalent of Beru FGR6KQU? It doesn't seem like Bosch has FGR6KQU available?


Can you confirm?

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