Is the correct part # 89615-12090?

Good points, all! Regarding the harness, I bypassed it by drilling a hole in the firewall on the passenger side. That could've been disastrous due to where wiring is on the engine side. I don't recommend doing it.Anyway, I ran some Belden shielded cable btween the computer undrer the passenger foot well (black and clear wires paralleled and the shield grounded) and the sensor mounted on an engine mounting bracket (see picture). It is possible that the wire guage could be too small and not properly passing the information to the computer. I've decided to order a Denso sensor as I was able to return the most recently purchased aftermarket KS. If the Denso sensor doesn't work... I'll locate and post a picture of the clamped-on sensor. Again, no posts by anyone who has successfully done either workaround.

One additional clue: if this RX300 has well over 150,000 miles, I would be even more inclined to suspect the original harness. I've seen quite a few Toyota and Lexus V6 engines from that era where the harness was the real culprit and replacing only the sensors did not solve the problem.

For a 2006 Lexus ES 330, if the car feels like it's applying the brakes even though the driver is not touching the brake pedal, there are several likely causes. I'd rank them in this order: A sticking brake caliper (most common) One or more brake calipers may not be releasing fully. Symptoms: Vehicle feels sluggish. Pulls slightly to one side. Reduced fuel economy. One wheel may be much hotter than the others after driving. Collapsed brake hose The flexible brake hose can fail internally and act like a one-way valve. Brake pressure reaches the caliper but cannot fully return. Similar symptoms to a sticking caliper. Parking brake partially engaged The ES 330 uses rear parking brakes that can stick from corrosion or cable issues. Often noticed after the vehicle has been parked for a while. Wheel bearing problem Sometimes a failing bearing creates drag that feels like braking. Usually accompanied by humming or growling noises. Traction Control or ABS intervention If a wheel speed sensor is malfunctioning, the system may occasionally apply braking to a wheel. Typically accompanied by ABS, VSC, or TRAC warning lights. Transmission issue A transmission that is not releasing properly or is downshifting unexpectedly can feel like braking. Drivers sometimes describe this as the car "holding back." Quick checks After a short drive: Carefully feel near each wheel (without touching the brake rotor). If one wheel is significantly hotter than the others, suspect a stuck caliper or brake hose. Note whether the car: Pulls left or right. Has any ABS/VSC warning lights. Smells like hot brakes. Feels worse after several miles of driving.

Thank you for the advice. However. I own a 2000 NX 300 as well as a 2010 Rx 350. It is the cigarette lighter fuse for the 2000 NX 300. Can it be found on the same place?