What is the OEM plugs for a 2007 G35x sedan, is it 22401-5M015 = NGK PLFR5A-11? if not, please list the part number or do you recommend something better?

 

they are listed as:

DENSO (Iridium-tipped type)
Standard type FXE22HR11
Gap (Nominal) mm (in) 1.1 (0.043)

 

What plugs are recommended? I was told by infiniti that its NGK brand.

 

1st gen used NGK and now they apparently switched to DESNO, either one is fine, imo any brand name plugs are fine as long as you get iridium, cause as is they are high quality and not that differentiable. NGK is good and reliable though

 

So I am guessing the cheapest NGK Iridium is good enough? they cost about $20 a pair here. Is there only one NGK iridium, IX?

 

what heat range is stock???

 

What's the Nissan part number? My mechanic got 22401-5M015 but its not the right size.

Would NGK LFR5AIX-11 fit? I can't seem to find any info for NGK part number for the 2007 and 2008 sedans.

 

I know the OEM spark plugs are Denso FXE22HR11 but would NGK LFR5AIX-11 fit?

 

not sure but this might help, DIY

 

On that thread someone with a 06 sedan said they had NGK PLFR5A-11 which is the same size as NGK LFR5AIX-11 but when I look up the size for the FXE22HR11 its smaller then the NGK? I been calling a bunch of part store and they all told me NGK LFR5AIX-11 will fit.

So these are OEM correct?
http://cgi.ebay.com/ebaymotors/ws/eB...#ht_531wt_1165

 

It won't fit for sure. I just tried on my car. The thread is too big. I'm out $40. lol

 

What car do you have? I have a 07 sedan and its the exact same OEM stock plugs.

 

I have the Sport sedan V36. The original plugs with the 14mm hex head had a smaller thread then the LFR5AIX-11 #4469

 

Sorry I got confused for a sec. I ended buying FXE22HR11 and its was same as stock. I know for sure those NGK will not fit.

 

Whats the life time on these plugs? My 07 with 107K miles still has the originals...