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Thread: What spark plugs for 0.9l Turbo Smart ForFour

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  1. #1
    Join Date
    Oct 2008
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    What spark plugs for 0.9l Turbo Smart ForFour

    Hi - My wife has a 2015 0.9l Turbo Smart Forfour and I'm struggling to find anywhere that will sell the spark plugs. Are the spark plugs from the Fortwo 0.9l Turbo the exact same? I want to be sure the length etc is the same before buying.

    I dont have a 14mm spark plug socket to get one out and bring with me before buying either so if anyone knows it would save me two trips!

    Cheers,
    Adam.

  2. #2
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    I managed to get one out with a 14mm socket and getting creative.

    For info it seems this is a plug used in Renaults/Dacia's

    NGK ILKAR7J7G (91121)

    Only place I could find them was Opie Oils, GSF and Ebay. I'm sure Smart/Renault have them but its Friday night and they're not open.

  3. #3
    Join Date
    Nov 2007
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    Why change the spark plugs on a nearly brand new car? I have a lawnmower from 1964 still on its original plug. I only change when they start misfiring.
    Drives a Smart Cdi - 65 to 85 MPG

  4. #4
    Join Date
    Jan 2011
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    Quote Originally Posted by tolsen View Post
    Why change the spark plugs on a nearly brand new car? I have a lawnmower from 1964 still on its original plug. I only change when they start misfiring.
    I was under the impression the 453 plugs were on a 4 year/50k cycle ?

    Was it misfiring ? .... could be HT related and not the plugs themselves.

    For info it seems this is a plug used in Renaults/Dacia's
    There’s a complete and utter surprise there
    Renault and Dacia are intertwined
    Last edited by reinaldo_is_spam; 03-08-2018 at 09:48 PM.
    You're so money supermarket and you don't even know it!

  5. #5
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    Car is studdering and spluttering like mad sounds like its running on 2 cylinders but no warning codes on the dash and Obd reader is showing ignition is 100%. Its a 2015 with 43,000 miles so thought I'd start with the spark plugs and ignition coils and go from there... Also got 3 ignition coils on e-bay from a 2018 with 3,000 miles on them for £27 woo.

    Hopefully nothing serious. If the above does not fix it'll either be a case of getting new injectors or seeing if I can get a leak down test done... just in case

    Also I'm pretty sure Reinaldo_is_spam is right its 4year/40k cycle.
    Last edited by adam1942; 04-08-2018 at 01:02 PM.

  6. #6
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    If the mis-firing is worst when opening throttle then I'd suspect ignition. If more general then fueling (including contaminated/stale) fuel is suspect. Possibly a sticky valve - not unknown.

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