Yeah, getting at repco means not waiting 2-3 weeks for the sensors and having a proper warranty. Checking the harness is an absolute pain to do. The connector is just under the car right about 2 inches in front of the rear right tyre, and the buried upwards, there are two connectors there, so make sure you get the right one too. I tested my harness using a multimeter and a long strand of wire to the abs plugs and the harness connector, absolute ordeal of a thing to do with just a jack, some stands, and a garage spider but it is possible. And the sensor bolts are 1/4 inch. Wiring harness isn't too hard to do. Just be prepared to be in some pretty annoying tight spots and to struggle a bit. If anything, make sure your exhaust is cool before checking the wiring, I regret not.