Autoleads PC9-404/PC9-410 - Audi ISO Lead/Harness Adaptor



Fitted bundle deal

includes Accessories + Fitting

Item: 240700

Autoleads PC9-404/PC9-410 - Audi ISO Lead/Harness Adaptor


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FREE Click & Collect

  • Description
  • Reviews
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  • Help & Advice
  • Buying Options
  • Autoleads PC9-404/PC9-410 - Audi ISO Lead/Harness product description

    ISO Lead/Harness Adaptor allows you to change the original headunit and fit an aftermarket headunit to a car that already has an amplified (active) speaker system. This way you will maintain the vehicles existing amplifier and wiring to the speakers.

    PC9-404 - Audi active phono lead Compatible with

    • A2 (02-05)
    • A3 (04-06)
    • A3 (96-04)
    • A4 (04-06)
    • A4 (94-04)
    • A4 (02>)
    • A6 (94-04)
    • Cabriolet (03>)
    • TT (99-06)

    BOSE + Symphony Radios to Phono

    PC9-410 - Audi active phono lead Compatible with

    • A3 (04-06)
    • A3 (03>)
    • A3 (96-04)
    • A4 (04-06)
    • A4 (95-04)
    • A6 (94-04)
    • A8 (94-04)
    • Allroad (04-06)
    • Cabriolet (03>)
    • TT (99-06)

    BOSE + Symphony Radios to Phono

  • Autoleads PC9-404/PC9-410 - Audi ISO Lead/Harness Adaptor is rated 3.3 out of 5 by 9.
    Rated 1 out of 5 by from Disappointed Bought the correct leads according to the data put in however no instructions on what to use or where to place the odd leads, box included two harnesses. Tried both and used what was obvious, seemed to work but not correctly as the speakers were crossed. My Audi S6 has the Nav Plus with Bose amp and speakers. Then there was a lot of crackling, next thing I know it's blowing the 20amp fuses. Had to remove the Pioneer unit and refit the OE one. Why sell these leads and have no wiring info to help the buyer to fit? Not the first time I've had issues with these kits.
    Date published: 2017-10-14
    Rated 1 out of 5 by from Doesn't fit 2006 Audi A4 Even though the web page says it fits a 2006 Audi A4 - it DIDN'T. At least got my money back.
    Date published: 2017-01-04
    Rated 1 out of 5 by from Rubbish Not right for car as advertised. Absolute waste of time money and effort.
    Date published: 2016-10-13
    Rated 5 out of 5 by from Adapter cables Worked perfectly. Click and collect great no hunting around store needed
    Date published: 2016-09-25
    Rated 4 out of 5 by from It was good Only needed half. Not sure why you gotta buy the whole lot. But yeah does what it needs to.
    Date published: 2016-01-09
    Rated 4 out of 5 by from works as advertised works as advertised, though the amplifier remote wire is missing at the head unit end, even though it is present on the Bose adaptor and required to power up the Bose amplifier. Had to wire it in myself.
    Date published: 2015-01-12
    Rated 5 out of 5 by from Great Guidance My son and I decided to change his car radio. Sourced the Pioneer unit we wanted and Halfords had a price match deal ! Decided to buy from them as they were local. The assistant got the radio from stock and spent 10 minutes talking to us about bits we may need, he said " if needed the item would be stock"..... Should have listen more closlely as I did need the harness... Thank you Halfords Winterstock rd, Bristol..
    Date published: 2015-01-05
    Rated 5 out of 5 by from Car Audio Leads The product was in stock and was perfect for the job as well as being reasonably priced
    Date published: 2013-11-06
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    • clientName_halfords
  • UK Delivery

    Standard Delivery

    £3.99 or FREE next delivery on all orders over £40 (Halfords products only)


    UK Delivery

    FREE Next Day Delivery on all orders over £40

    Offer not available on products sold by our Approved Partners


  • 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.

Autoleads Stereo Fitting Accessories

Autoleads PC9-404/PC9-410 - Audi ISO Lead/Harness Adaptor

£16.99 Audi Active Phono Lead for BOSE + Symphony Radios to Phono