Denso Tire Pressure Monitoring System (TPMS) Sensor - 550-0103 (Fits Select Models and Years of Lexus, Pontiac, Scion, and Toyota Vehicles)

After 2month installation, the light on the dashboard if off. Working as intended.

I installed 5 of these with my new tires on my 2009 Lexus RX350. I use an Autel MaxiTPMS TS501 tool to scan the codes and upload into the car's ECN with the cable that's included with the tool. All good. This is a great tool. The tricky parts:1) be sure and wake all the sensors up. On the first pass, I don't think I did, because two were not responding to the TS501 trigger. The would sit there for a long time, and then finally pop up with a "duplicate" ID message. They were obviously communicating with another sensor somewhere else on the car. So I went back and deflated the tires quickly (unscrewed the valve core) to <20psi, and then reinflated them to 33 psi. I then cleared the codes in the TS501 and started over.2) upload the codes to the ECN, and be sure to check "TPMS Status" with the tool. If not all sensors show a response and a connection (indicated with icons on the status output), click on "repair" and let it go through it again.... Everything cleared after this step for me.3) Though the codes in the car's ECN now matched the codes scanned by the TS501, my dash light was still flashing. This happened 3 years ago when I first replaced sensors when installing new summer tires. The solution (worked for me at least) was to hook my laptop up to the OBD-II port and connect TechStream. Go the the TPMS table in TechStream and check (again) the codes. Once in TechStream, after a short while, the light went out. Exactly as it did in 2019 for me. I didn't change anything through TechStream, it seems that just by going into TechStream the ECN gets the word to start behaving. Maybe a ploy to get owners to have to go to the dealer to buy sensors and maybe even tires?Anyway, all is well now for me for another 3 or 4 years.

TPMS Amazon reviewI write this review to try and clear up some of the timidness I had when purchasing these sensors. I’ll admit, I wasn’t sure if I could get these sensors to work using the tools I had when I ordered them. In short, THEY WORKED. I installed these on a 2008 Scion tC with 168k+ miles and was able to wake them up and write them to the ECU using an Autel TS601. In theory, you should also be able to use the Autel TS501 as well since it has the capability to write the new sensor IDs to the ECU as well. There is a review by Paul on March 8, 2019 that describes the authenticity of these sensors. When I took out the stock sensors, they also had “Pacific” on them. The tC uses a low profile tire and since mine were worn out and I don’t have a tire changing setup, instead of breaking the bead I did the “easy” method and cut a hole in the sidewall big enough for my hand and replaced each sensor. I also torqued them to the required value printed on the sensor (4 N-m). I believe it was an 8mm socket. With the sensor replaced, I took the wheels (off the car) to Discount Tire to replace the tires. Once I picked them up, I put them back on the car. There is a red piece of paper that comes with each sensor that gives instructions to wake the sensor. I didn’t have one of the tools mentioned so I used the deflate air method. To wake each sensor, I took a pin and pushed in the valve stem to deflate the tire and counted for 6 seconds. The instructions say 3secs but I did 6secs just to be sure. Not that I did not remove the valve, I just pushed it in as if the tire was overinflated. After 6secs, I stopped deflating and immediately triggered the sensor using the Autel TS601. The stock sensors triggered and reported their data on the Autel in 2secs or less whereas these sensors took significantly longer to respond. One sensor took ~20secs. After waking up and reading all the sensors, I plugged into the OBDII port and wrote the new sensor IDs to the ECU using the Autel. The Autel simultaneously clears the TPMS warning light during this process so there is no requirement to drive X distance for Y amount of time at a minimum speed of Z mph. You simply write the new sensor IDs to the ECU and you’re done. Don’t forget to reinflate your tires after deflating them to wake up the sensor.