Does anyone know how much they have paid for a S1B1 O2 sensor replacement on a 2007 RX 350, the dealer is asking for $575. I feel that it is way over priced.

It’s because it’s an expensive OEM sensor and they probably charge 1-1.5 hours for labor which at my dealer is $155 an hour. I don’t know where that sensor is, but assuming it’s somewhat accessible, just get an exact fit denso sensor from advance auto, anywhere from $60-100, the o2 socket set femovlal rental kit for a $50 deposit, and you’re on your way. Just hope the sensor is in an easy place to reach.