Review on Sangyue 02 O2 Oxygen Sensor Set for 2007-2009 Jeep Wrangler 3.8L - Upstream + Downstream (4PCS) by Kevin Kimbrough

I started getting codes on my O2 so I bought these to replace. They don't come with anti-seize like Bosch. Easy to install, connectors work as expected; However, they broke right out of the box. Started getting new codes. I emailed the seller and explained my problem. They offered me a 50% refund and a new kit, which I declined and responded with a 100% refund with no replacement (I bought a Bosch instead). The seller agreed and sent me a return label. Unfortunately I also had to pay for the return shipping so at least they only got me for $10 and not the $71 I paid.