TPMS Replacements
Instructor
Joined: Feb 2021
Posts: 835
Likes: 408
From: PA
".....I guess I will have to read the sensor part number on the vehicle we purchase in order to know which one to get?"
Make sure the sensors that come with the car are working 100% first. Then use that part number.
Make sure the sensors that come with the car are working 100% first. Then use that part number.
10th Gear
Joined: Nov 2023
Posts: 10
Likes: 5
From: IL
Yeah that's going to be the best way, and we luckily have a good Autel scan tool to read it.
5th Gear
Joined: Dec 2022
Posts: 5
Likes: 3
From: AZ
Hi all, just throwing in my 2 cents, I had the "dashes" issue on all 4 wheels. Occasionally I would get readings, then nothing, sometimes the exclamation point light then not. I finally found the tmps reset button way under dash, did it quite a few times but always ended up with dashes. Was getting worried because have read around $400 each at dealer. I took it in last week and he came back pretty fast and said we "rebooted" and they work fine. Thought was strange but was relieved. I told him I was tempted to unplug one of the battery terminals for a kind of reset and he said no don't do that lol. Anywho, I also asked him can't I reboot it myself and he said just bring it here. All's well!
Racer
Joined: Nov 2017
Posts: 1,941
Likes: 581
From: New York
Hi all, just throwing in my 2 cents, I had the "dashes" issue on all 4 wheels. Occasionally I would get readings, then nothing, sometimes the exclamation point light then not. I finally found the tmps reset button way under dash, did it quite a few times but always ended up with dashes. Was getting worried because have read around $400 each at dealer. I took it in last week and he came back pretty fast and said we "rebooted" and they work fine. Thought was strange but was relieved. I told him I was tempted to unplug one of the battery terminals for a kind of reset and he said no don't do that lol. Anywho, I also asked him can't I reboot it myself and he said just bring it here. All's well!
Lexus Test Driver
Joined: Jul 2017
Posts: 9,582
Likes: 3,408
From: NJ
Hi all, just throwing in my 2 cents, I had the "dashes" issue on all 4 wheels. Occasionally I would get readings, then nothing, sometimes the exclamation point light then not. I finally found the tmps reset button way under dash, did it quite a few times but always ended up with dashes. Was getting worried because have read around $400 each at dealer. I took it in last week and he came back pretty fast and said we "rebooted" and they work fine. Thought was strange but was relieved. I told him I was tempted to unplug one of the battery terminals for a kind of reset and he said no don't do that lol. Anywho, I also asked him can't I reboot it myself and he said just bring it here. All's well!
Racer
Joined: Nov 2017
Posts: 1,941
Likes: 581
From: New York
Is that different than just using the recalibration through vehicle settings? I had a similar scenario with my wife's RX just this week. I topped off all four tires - then driving home I had the four dashes - never saw that before. I though perhaps a huge coincidence that a sensor battery just died as I was filling the tires. Couple days later she has the dreaded flashing then solid TPMS lamp - usually indicates problem with system - bad sensor etc. (I checked the tires just to be sure and they were all at 35psi so no issue there). I did the recalibration and now getting the proper readings, no light and so far so good. Her RX is seven years old - I suppose sensors can go bad at that age.
5th Gear
Joined: Dec 2022
Posts: 5
Likes: 3
From: AZ
Racer
Joined: Nov 2017
Posts: 1,941
Likes: 581
From: New York
LOL! Dealers usually don't do anything for free, unless warranty of course. That was nice of them.
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Driver
Joined: Jun 2024
Posts: 70
Likes: 17
Lexus IS's TPMS, be it OEM or 3rd party, new or old, re-learnt or not, reset or not, calibrated or otherwise, is only a very rough pressure indicator.
More useful to detect flat than anything else.
Each TPMS on same car, is randomly off by +/- 3psi, from 4 different wheels.
Such is the issue with low aspect ratio tires where their TPMS is totally off.
Accuracy of TPMS is badly affected by which side or the road you drive, temperature of tire & speed you drive.
In summary TPMS, won't work to prevent under or over-inflation of tire-pressure.
Best to invest in a very good tire digital gauge & only measure tire temp is at room temp (24C / 75F).
If you have an old worn-out arm-bushing (pot-holes abused) Lexus IS/RC/LC, it's best to measure the tire tread depth & tire pressure every 1,000-2,500 miles & inflate slightly above 1psi, to reduce inner wear.
In short, get a very good tire tread gauge in addition to tire pressure gauge
More useful to detect flat than anything else.
Each TPMS on same car, is randomly off by +/- 3psi, from 4 different wheels.
Such is the issue with low aspect ratio tires where their TPMS is totally off.
Accuracy of TPMS is badly affected by which side or the road you drive, temperature of tire & speed you drive.
In summary TPMS, won't work to prevent under or over-inflation of tire-pressure.
Best to invest in a very good tire digital gauge & only measure tire temp is at room temp (24C / 75F).
If you have an old worn-out arm-bushing (pot-holes abused) Lexus IS/RC/LC, it's best to measure the tire tread depth & tire pressure every 1,000-2,500 miles & inflate slightly above 1psi, to reduce inner wear.
In short, get a very good tire tread gauge in addition to tire pressure gauge
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