Halfords 501 Resistor Upgrade Kit



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includes Accessories + Fitting

Item: 307030

Halfords 501 Resistor Upgrade Kit


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  • Description
  • Reviews
  • Delivery Options
  • Help & Advice
  • Buying Options
  • Halfords 501 Resistor Upgrade Kit

    The Halfords Resistor Upgrade 501 Kit prevents error warning lights that are triggered by fitting aftermarket LEDs, such as the CANbus system alerting you that the bulb is broken. Easy to fit - this clever kit plugs into your vehicle’s bulb socket so there is no need to re-wire or solder. Ideal for high spec vehicles from brands including Audi, BMW, Mercedes and VW.

    Halfords 501 Resistor Upgrade Kit Extra Info

    • 2x resistor kits
    • Stop error warnings caused by retrofit LEDs
    • Easy to fit – no need to rewire or solder
    • Useful for modern cars such as Audi, BMW, Mercedes, VW etc
  • Halfords 501 Resistor Upgrade Kit is rated 4.8 out of 5 by 4.
    Rated 5 out of 5 by from 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!
    Date published: 2016-02-26
    Rated 5 out of 5 by from 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!
    Date published: 2015-01-08
    Rated 4 out of 5 by from 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.
    Date published: 2013-12-24
    Rated 5 out of 5 by from 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.
    Date published: 2012-10-19
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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 halfords.com.

    Checkout is always via halfords.com and all payment will be taken via halfords.com. 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.

Halfords Styling & Exterior Lights

Halfords 501 Resistor Upgrade Kit

£7 Halfords 501 Resistor Upgrade Kit (CANbus Compatible)