Prius C Spark Plugs and/or Coils In A Gen 2? With Observations.

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by James Analytic, May 18, 2025.

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  1. James Analytic

    James Analytic Member

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    Regarding coils, below is what I found since pasting the linked spark plug info might be a little more overwhelming. Interesting however, the Toyota Parts Deal page notes that the Genuine Toyota 90919-01265 Denso FK16R-A8 only for the Prius C. Where-as the Gen 2 Prius is noted Genuine Toyota 90919-01240 Denso, of course I think is, SK16R11 with a few vehicles noted used in:

    Year Make Model Trim & Engine Important vehicle option details
    2012-2015 Scion xB 4 Cyl 2.4L 2AZFE; AZE151L-FHMNKA, AZE151L-FHMNKK, AZE151L-FHPNKA, AZE151L-FHPNKK
    2002-2005 Toyota Celica 4 Cyl 1.8L 1ZZFE, 2ZZGE; ...
    2002-2005 Toyota MR2 Spyder 4 Cyl 1.8L 1ZZFE; ZZW30L-AKGQHA, ZZW30L-AKLQHA, ZZW30L-AKMQHA
    2012-2014, 2003-2008 Toyota Matrix CE, LE, S, STD, XR, XRS|4 Cyl 1.8L, 4 Cyl 2.4L 1ZZFE, 2AZFE, 2ZRFE; AZE141L-DHANKA, 2ZZGE; ...
    2003-2009 Toyota Prius 4 Cyl 1.5L 1NZFXE; NHW11L-AEEEBA, NHW11L-AEEEBK, NHW20L-AHEEBA, NHW20L-AHEEBK
    2006-2018 Toyota Yaris RS, STD|4 Cyl 1.5L 1NZFE; NCP131L-AGMRKA, NCP131L-...

    Back to coils, appears both Prius C and Gen 2 use the Denso 673-1306 or am I making a mistake?

    Toyota Parts deals notes for the ignition coils for the gen 1 & 2's that the part # 90919-02240 can be used in (same Denso 673-1306 noted here?):
    Year Make Model Trim & Engine Important vehicle option details
    2004-2006 Scion xA 4 Cyl 1.5L 1NZFE; NCP61L-HHMNKA, NCP61L-HHPNKA
    2004-2006 Scion xB 4 Cyl 1.5L 1NZFE; NCP31L-DHMNKA, NCP31L-DHPNKA
    2000-2005 Toyota Echo 4 Cyl 1.5L 1NZFE; NCP12L-BDMRKA, NCP12L-BDMRKK, NCP12L-BDPRKA, NCP12L-BDPRKK, NCP12L-BEMRKA, NCP12L-BEMRKK, NCP12L-BEPRKA, NCP12L-BEPRKK, NCP13L-AGMRKK, NCP13L-AGPRKK, NCP13L-AHMRKK, NCP13L-AHPRKK
    2001-2009 Toyota Prius 4 Cyl 1.5L 1NZFXE; NHW11L-AEEEBA, NHW11L-AEEEBK, NHW20L-AHEEBA, NHW20L-AHEEBK
    2006-2011 Toyota Yaris RS, STD|4 Cyl 1.5L 1NZFE; NCP91L-AGMRKA, NCP91L-...

    For the Prius C Toyota Parts deals notes the part # 90919-02265 (same Denso 673-1306 noted here?):
    Year Make Model Trim & Engine Important vehicle option details
    2012-2019 Toyota Prius C G, R, V|4 Cyl 1.5L 1NZFXE; NHP10L-AHXGBA, NHP10L-AHXRBA, NHP10L-AHXVBA
    2010-2018 Toyota Yaris RS, STD|4 Cyl 1.5L 1NZFE; NCP131L-AGMRKA,...

    Any thoughts regarding using the Prius C plugs and or the coils in a gen2?

    The more I think about this, the pressure from the latest storm might be getting to my head or whatever it is going around.

    Gets me wondering about those pink genuine C fuel injectors utility next.
     
    #1 James Analytic, May 18, 2025
  2. Tombukt2

    Tombukt2 Senior Member

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    Both engines are one NZ I would imagine if the coils will bolt down to your cylinder head or valve cover rather and are the same length extension wise by setting them next to each other you're probably in good shape I would think by now that the plug would have changed that plugs to the coil so make sure that that's the same I noticed in some of the newer cars the coils are the same but the plug is different so unless you clip the plugs from a Prius C there may be an issue there I can't see them from here I don't have a c here I know it's one NZ but later model one nz's may have different plugs on the coils on the fuel injectors and so forth I would have to physically go out and look if not they probably will work fine the pink injectors one of my older 85 Toyotas had pink injectors so I'm not sure what the color means necessarily again the plug would be the issue and if there's any difference in computer or resistance and that sort of thing you'd want to note that between the two systems it could make a difference fuel injectors aren't that expensive to start sourcing other engines and products for your engine you don't have all the other stuff that the more modern one NZ may have not saying they won't work they're both 1.6 l and all that so fuel and trims should be similar but if impedance changes or something like that then that could throw everything off the plugs sitting them side by side should be the same reach and extension and the heat range should be the same which is the 16 I don't know what the f and all that business is about I know about older Denso plugs but not the newer stuff. Again the plugs aren't expensive enough to make me go search for other plugs used to be between the fine wire Zu plugs and the PQ Platinum plugs and so on for some benefits and differences but these things today probably not so much unless I could get these parts at some kind of huge discount of for free I don't know why I would be changing from my regular dedicated one NZ parts for the model I have and I have plenty so I don't know when I'll be trying late model or later model parts on my old Gen 2 I might never get there
     
    #2 Tombukt2, May 18, 2025
  3. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    They both use the 1NZ engine.

    There are some differences in the tuning which (in my head) account for different plugs, but the plugs aren't that different and thus do not require different coils.

    I'd stick with Toyota's recommended plug for your car, but I'd have no reservations about using coils from a c.
     
    #3 Leadfoot J. McCoalroller, May 18, 2025
  4. James Analytic

    James Analytic Member

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    Yeah, I only bother checking the 1.5L's to see if Iridium or better than recommended since those cost more. $1.25 in the yards I go to and I can return as well unless a 50% off sale. So win-win for the time to remove and inspect enough to determine if a bother to take home and quick test in the tester. When I did a side by side the Platinum tip with the Iridium I was blown away how better the Iridium's are and never looked back,

    Quick look on AutoZone's website I found what appears the only difference between the Denso 3485 (FK16R-A8) and the Denso 3324 (SK16R11) are the 3485's used in the Prius C have a Platinum electrode core material compared to the Nickel. Also, the gap for the 3485 is 0.032" compared to 0.044" Temps appear the same, so that looks good in regards to specs for using. 5000ohms is noted for the 3324 and the DensoProducts site notes 5000ohms as well. So looks like a interchange with no issues that come to mind.

    Interesting how the C uses the 1NZ with an EGR and some mods like the literally same electric water pump used with the gen 3 & 4 Prius 1.8L.

    I literally picked up a lower mileage Prius C engine to save from being scrapped and to eventually modify to fit in a gen 2. The blocks are similar and require some holes drilled to mate with the Gen 2 eCVT since the eCVT's are different slightly. The damper from the gen 2 also needs to be installed. I haven't determined how to easily retrofit a manual water pump, definitely requires some custom fabrication and design including with the engine mount for the pulley tensioner, so seems easier to use the electric with a custom relay circuit to power and also trimming then welding back sealed some of the gen 2 intake where the water pump is in the way so can fit. Also using the gen 2 exhaust manifold and wire harness and such. Literally removes the EGR from the design.
     
    #4 James Analytic, May 20, 2025
  5. Tombukt2

    Tombukt2 Senior Member

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    Why would you not just move the timing cover over from the generation too engine to the one you don't know how you're going to put the water pump on that has all of that on that if I'm not mistaken like all the Toyota motors not sure about drilling the holes for the ECT but if that's a thing I guess it is I haven't really looked I would think the new block assembly would have all the original holes already there whether one or two need to be tapped might be a thing but I didn't realize it would be missing the holes that means they had to change the whole mold for the block or whatever you want to call it or something quite interesting because the bore n stroke and all is the same so strange. I would think most of the other stuff besides the hole drilling should move over from the regular earlier one NZ and then I'm not trying to run the head on the newer one NZ I've got one ready to go that's original so I don't have to block off EGR play games the c is much like the three that's why I haven't bothered to buy one I don't really trust him I've seen a lot of them in junk yards and tow lots and mechanic shop so you know it doesn't look like it's the way for me to go the air conditioning guy loves his. And then when I think about all this just to freshen up an original block won't take anything I mean when you tear most of mine down cranks don't need to be polished or anything there barely starting to show and I mean barely starting to show some orange / copper color on the mains and connecting rods so putting stocks back in honing the boes fit some real rings and it should be ready to rip
     
    #5 Tombukt2, May 20, 2025
  6. James Analytic

    James Analytic Member

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    I've thought about that as well. Still need to look into more as been a while, though seemed like I noticed something when looking at last where still needed some custom fabrication more than likely. Just don't recall offhand.

    Here are some bad videos I made to remind me and look bad in the future. ;-)

    First look at: - YouTube

    Second look at: - YouTube

    Third look at:



    Reminds me that there is something custom bracket that needs to be made to mount the gen 2 AC Compressor on the block and I forget why. Maybe how the casting was made and either not drilled out or something slightly different. Can mount, though need to make a custom bracket I recall anyways.

    I do clearly remember reading that the connecting rods interchange with the gen 2's and the Prius C pistons are different. I literally was debating removing the Prius C head and keeping along with the pistons and connecting rods from a yard parts car where I almost took the engine though where the thermostat bolt or some other bolt mounted on the block that riser cast part was cracked so didn't. Mainly though I was struggling for weeks about removing the connecting rods and wrist pins to keep in my stash. I didn't confirm the wrist pins interchange, though assume they did.
     
    #6 James Analytic, May 21, 2025
  7. Tombukt2

    Tombukt2 Senior Member

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    Any wrist pins or small ends like that can be usually easily bored and reamed for near nothing but they should be close the air conditioning compressor I can't imagine we don't have a bracket on the one NZ as it is I imagine the Prius C doesn't have a bracket the compressor assembly just bolts with four through bolts right to the side of the block the four holes that are there are the holes that are there that would hold the air conditioner bracket for the belt driven compressor cars it's the same pattern I do believe now you've got me having to go look but I believe that's the case they use that same bolt pattern for the bracket for the round compressor that takes the clutch and belt and idler and then when that's removed that same bolt pattern is on the bigger electric assembly and you just put the same bolts in that go on the regular compressor will go through the electric compressor and hold it on to the side of the engine no worries about alignment issues yeah I'm looking at it now can't imagine a bracket but even on the later one doesn't seem like that could be but you
     
    #7 Tombukt2, May 21, 2025
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