This is the one i use with my iphone 5c
https://www.aliexpress.com/store/product/2014-Newest-For-IOS-and-Android-Viecar-4-0-obd2-bluetooth-scanner-tool-for-Multi-brands/803871_32233576208.html
Thanks for your great advice
is this one right
http://www.ebay.co.uk/itm/Viecar-4-0-OBD2-Bluetooth-Scanner-for-Multi-brands-with-Car-HUD-Display-Function-/261911962528?hash=item3cfb2b63a0:g:1~oAAOSwstxVbWyH
Well it's done at last the wife managed to get one of the plugs off so i plugged the new sensor in without unscrewing the old one and the noise stopped on startup and the lights went out, so i popped to my local garage and he fitted the sensor in 5 minutes and the wife plugged it in.
Total cost...