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Item: 307030

Prism Resistor Upgrade 501 Kit


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  • Prism Resistor Upgrade 501 Kit

    The Prism Resistor Upgrade 501 Kit fits simply to the warning light inside your car to prevent errors that are caused by fitting aftermarket LEDs. This clever kit plugs into your vehicle bulb socket so there is no need to re-wire or solder.

    Prism Resistor Upgrade 501 Kit Extra Info

    • Fitting Accessories: Upgrade Kit
    • Prevent errors caused by fitting aftermarket LEDs
    • Useful for modern cars such as Audi, BMW, Mercedes, VW etc
  • Rated 4.8 out of 5 by 4 reviewers.
    Rated 5 out of 5 by Resolved error code I have a MK7 Golf 2.0tdi and bought some allegedly cambus free LED bulbs from another retail outlet but when I put them in it straight away bought up the warning message saying to check my registration plate bulb. I then found this product on the Halfords website and thought I'd take a gamble on it and glad I did, it cleared the warning message but are so easy to fit too. Literally plug the white end of the part into the original bulb holder, put your LED bulb into the black end of the part and then slide the black end with the bulb in it into your exiting bulb covering and that's it, SIMPLES! 26 February 2016
    Rated 5 out of 5 by Prism Resistor Upgrade 501 Kit LED lights and fault notification had side light error notification. The Prism Resistor Upgrade 501 Kit solved this. Easy to fit! 08 January 2015
    Rated 4 out of 5 by It's a good item. Only 1 complaint. It's a good item and dose turn off the bulb out light The only thing I can complaint about is the part that holds the bulb is not big enough to clip into my light so it's basically just sitting there but I haven't had a problem so far and it's been a month. 24 December 2013
    Rated 5 out of 5 by No More Canbus Errors I used this product on a BMW canbus systen motorbike to stop error codes when I replaced the w501 running lights with LED's. They work perfect with no error codes and I only needed one to fool the canbus system so as there are two in a pack I also have a spare. These 3w resistors are a great way to work around the canbus problem when fitting LED lights, are easy to fit and are good value for money. 19 October 2012
    • 2016-09-29 T08:20:43.082-05:00
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    • Standard Delivery

      FREE within 4 working days on all orders over £30 (Halfords products only)

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      Order by 8pm Friday for delivery on Sunday

    • Morning Delivery

      Order by 8pm for delivery 8am - 12 midday (Mon - Fri)

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      12 midday - 6pm (Mon - Fri)

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      Order by 8pm for delivery 6pm - 9pm (Mon - Fri)

  • 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.

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    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.

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Prism Styling & Exterior Lights

Prism Resistor Upgrade 501 Kit

£9.99 The Prism Resistor Upgrade 501 Kit prevents errors caused by fitting aftermarket LEDs.