FR78NX Bosch Super 4 Spark Plug x4



Fitted bundle deal

includes Accessories + Fitting

Item: 970590

FR78NX Bosch Super 4 Spark Plug x4


How can I get it?

FREE Click & Collect

  • Description
  • Specification
  • Reviews
  • Delivery Options
  • Help & Advice
  • Buying Options
  • FR78NX Bosch Super 4 Spark Plug x4

    Improve your engine's performance with the FR78NX Bosch Super 4 Spark Plug x4. Featuring a unique design, this spark plug does more than a conventional spark plug throughout its service life.

    FR78NX Bosch Super 4 Spark Plug x4 Extra Info

    • Superior engine versatility
    • Electrode gap adjusted ex factory
    • Noticeable improvement in acceleration
    • Significantly improved engine smoothness
    • Please note packaging may vary

    Additional Information

    Please check with your vehicle manufacturer or workshop manual to confirm the suitability of this part for your vehicle.
  • Hex Size: 16
    Thread Length mm: 26.5
    Thread Size mm: 14 x 1.25
  • FR78NX Bosch Super 4 Spark Plug x4 is rated 3.4 out of 5 by 5.
    Rated 2 out of 5 by from Not worth the money Needed new plugs for my Toyota Avensis so decide to try these. Put them in with great anticipation and was instantly disappointed. The starting and performance want not as good as the NGK's I had taken out even though they had done 25k miles. Thought the ECU might need to recalibrate so left them in for a month. No difference so replaced them with NGK and what an improvement. Wish I hadn't fallen for all the sales hype and wasted the money.
    Date published: 2017-05-13
    Rated 5 out of 5 by from top quality spark plugs. engine starts up a little better. Peace of mine knowing my Peugeot has the recommended plugs in it and it now starts up a little smoother. Nice to know i have top quality plugs.
    Date published: 2014-12-04
    Rated 4 out of 5 by from Fitted to 1.6 16v TU5FU engine (Petrol) Very good indeed has improved lower end pickup & fuel consumption. I now get around 46mpg! Before fitting these I was getting around 42mpg. However, they do seem to lose their 'spark' (wear out quicker). I replace mine every 10,000miles
    Date published: 2013-03-15
    Rated 5 out of 5 by from Amazing change... Stuck a set of these in TU5JP4-engined Citroen to replace the original NGKs two years ago. They make a huge difference. With the NGKs the engine was rough and gutless under 3000rpm. With these is burbles along quiet happily at low RPM. Only problem is I'm having trouble getting another set, tried local Halfords twice and they were out of stock.
    Date published: 2012-07-01
    Rated 1 out of 5 by from wrong item unfortunately, this product did not fit my nissan almera tino, had to return product and obtain correct spark plug, this was most annoying as i hade to make two journeys, 30 mile round trip
    Date published: 2011-10-08
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  • UK Delivery

    £3.99 NEXT DAY Delivery available on orders under £40 placed by 8pm*

    Your delivery date will be communicated at checkout. Delivery times are Monday to Saturday.


    UK Delivery

    Free NEXT DAY Delivery available on orders over 40 placed by 8pm*

    Your delivery date will be communicated at checkout and on your confirmation email.

    Delivery times are Monday to Saturday. Next Day delivery not available on all products; including Built Bikes, Bulky items and Web Exclusive products. Bike delivery will take three days, and an extra day if you'd like us to build it for you.

    *Click here to learn more.


    UK Delivery

    FREE Click & Collect - you can reserve an item online and pick it up from a store of your choice

    Simply enter your Postcode on the product page to check availability, and select Click & Collect at checkout. What's more, you pay for your items on collection. Click here to learn more.

    Items in stock - collect from 1 hour
    If your item is in stock at your chosen store, you can collect it from one hour after ordering online. We'll hold your item in-store for seven days.

    Items not in stock - collect next day*
    If your item isn't in stock, we can order it to your chosen store for collection.
    *If you place your order before 8pm you can collect it from 4pm the following day (except Sundays), and we'll hold your item in-store for seven days.

    Built Bikes
    Collection time will increase by 24 hours if you'd like us to build your bike for you.

    Please note that items sent directly from the supplier need to be ordered by 3pm for collection two days later. All delivery times will be shown during checkout.


  • You can buy this product from one of our carefully selected Approved Partners. The full list of options available are below. Simply add your chosen option to your basket and proceed to checkout when you're ready.

    You can purchase products supplied by Halfords and selected other suppliers on

    Checkout is always via and all payment will be taken via In checkout the products will be split into separate deliveries for each supplier.

    Showing 1 - X of our buying options
    Price Seller Info Purchase

Some of the parts we sell here at Halfords have been reconditioned. These will carry a Refundable Deposit or an extra surcharge amount. When you add one of these reconditioned items to your basket, we'll add this extra cost automatically.

Once you've sent us your old item we'll check it over, and then refund you the full surcharge as long as everything is ok.

Before you return your old unit please make sure it's in re-serviceable condition. So if you're returning caliper casings, you'll need to double check they aren't badly damaged or broken. If the part you've sent is found to be unserviceable, we reserve the right not to refund the surcharge.

Please note that if you're returning your old unit to our National Returns Centre then this will be at your own expense.

Bosch Spark Plugs

FR78NX Bosch Super 4 Spark Plug x4

£22 FR78NX Bosch Super 4 Spark Plug x4 features a unique design