Thanks. I already purchased Bosch exact fit replacements. I replaced both front sensors, but have not tackled the two rears. The sensors were easy to get to, but the wiring plugs were in a place under the left side of the engine compartment, nearly unreachable, except with the engine sub-frame dropped from the car. It took me several hours to get them un-plugged and replaced. The two rear sensors require dropping the front exhaust pipe and removing the heat shield. They are located on the top of the twin pipes, with no verical clearance from the heat shield. I do not have a lift, so am trying to think of a way to gain enough clearance using only jacks and stands.