SchraderTPMS Retrofit Kit for Passenger Cars and Light Truck

Since I do TPMS certification training this product intrigued my interest. Schrader provides many of the OE market and figured this would be a good product. I would say the sensors are rock solid and in fact are the same as supplied to many GM vehicles. A little poking at the sensors revealed this and I chose to settle on a 2018 Chevrolet Silverado for sensor testing and verification and this is NOT necessary, just for my own curiosity. Also these are 433 MHz if anyone is interested. And if a sensor goes bad over time then a new one can be programmed to match the failed sensor, again using the 2018 Chevy as the protocol to use, without having to relearn the display unit. Or you can buy the Schrader 29015 for replacement sensors or you can add 2 more sensors to support a pickup dually. If you buy the Schrader 29015 to replace a sensor then the display unit will need to relearn the sensors.Installation went well. I did my own as I have access to the tire changer and balancer. Some videos on you tube show various methods in doing this procedure. I did this on a 2006 Mustang. I only broke the outer bead, removed the old stem and installed the new stem with sensor while pushing the outer bead down to get access. Use tire lube all round. The sensors are marked so you will know where to place them with the corresponding rim. Inflated and checked the balance (it did not change the balance on 1 tire and slightly on the other 3). I would balance the tires anyway but since these had just been done last month I was curious. The sensors are not heavy at all.I did charge the unit using the USB connector and from then on it seems to do okay using the solar charger built into the top of the display unit. Displays both pressure and temperature. It is interesting to see the pressure and temp rise as you drive it during different driving distances and outside temperature conditions. Really brings home the fact you should check and adjust air pressure when the tires have not been driven for a few hours. I had 3 at 32 and the FR at 30. After driving for 30 minutes the 3 rose to 34 and the FR to 32. So checking the FR after driving would have said ok and the other 3 a bit over. Adjusted RF to 32 cold the next morning solved this bit of OCD. All is well. You can change the display pressure units and change temperature units as well. All of this is in the manual.I did do some testing holding the sensors at the valve stem of my trailer and triggering them with the Snap-On TPMS4, the sensors will read when the display unit is in the cab of my pickup. Seems promising and may add this to my trailer. Nice thing is the display unit can go with the trailer and is not wired to the vehicle, though you could use a power point to charge the display unit.OK a bit of TPMS lesson/terminology. Sensors can be OE like the 29015 or programmable like the Schrader 33500 but the 33500 WILL need to be programmed to the proper protocol. The display unit (or vehicle) may need to relearn the sensors especially if the vehicle displays tire pressure based on where they are oin the vehicle and this display unit does. If you rotate tires then you will need to follow the relearn procedure in the manual and don’t lose it Schrader doesn’t seem to have one online, yet. If you do rotate tires and do not do the relearn then it is not a big deal just check ALL the tires when you get a low tire alert so no different than a Ford/Toyota and some others. Also I may suggest max top speed for these sensors is 115 mph according to the documentation I have seen at Schrader Academy. They do make sensors for up to 155 mph should you need that level of performance.All in all a nice unit that comes with a display unit and $120.00 of sensors. Not bad and time will tell for reliability of the head unit. Not concerned with the sensors they are Schrader OE.UPDATE: Added one of these to my older pickup and works very well.UPDATE: The Schrader 29015 is replaced by the 29086. Still working well after 3 years.UPDATE: The battery died in one of my units and I got a replacement battery (102535). I did have to clip the connector as the replacement battery had a larger connector. Soldered the wires and some heat shrink tubing and it was working well. Four screws on the bottom and the top cover tilts forward, be careful as there are wires attached to the buttons on the top cover. Two more screws and you can tilt the board up and the battery is held in with double sticky tape. Reassembled carefully and the unit functions well.

I'm using this kit to monitor the tires on my trailer. I haven't towed it yet with these sensors but here are some things I've noted so far.Switching from 2 to 4 to 6 wheels only gives me the screens attached. I'll assume that it will go to six like in the directions if 2 more sensors are added. The temperatures shown are off by a few degrees, but not enough to make a difference.Since these are GM sensors you can can also activate them with the orange TPMS learning tool. Helpful if you want to check pressure without driving around. Also, you can activate the sensors before installation by shaking them.The sensors and display have enough range to work on an 18' car trailer. I can even put the display outside my metal sided pole barn and activate the sensors with success.Update, I also posted this on a forum so some could be a repeat:So here is a slightly longer term review of the Schrader system I've been mentioning here. I have 2 of them, one for my car trailer and one for the camper, this is the first year I've been using the system and have towed both trailers twice. Car trailer is an open 18 foot and the camper is an older (aluminum siding instead of fiberglass) 27 foot.Bottom line up front: The system works better on the car trailer than the camper, but still works great(ish) if you wake up everything with the relearn tool. Details below.I usually activate the sensors with the relearning tool before leaving the house, you don't have to put the display in learning mode. When you turn it on there are no pressures displayed as everything has been parked for a while. With the display in the truck and using the relearn tool, all sensors wake up and display their pressure and temperature. This part is interesting as the camper has the spare tire mounted on the rear bumper and it works this way!!! I had an extra 433mhz sensor so I figured why not see how well it works on the spare. I had to set the display for 6 tires and it doesn't complain that there are only 5. Now because the spare is just along for the ride and doesn't actually spin, I get an error on the display after about 45 minutes to an hour of driving. The first time it happened I wondered if it just timed out or if the spare fell off the camper. The display alarms and shows -- for pressure and temp, the alarm is silenced by pressing any button on the display. Not a big deal and I'll probably set it back to 4 wheels eventually, but it's nice to use the sensor in the spare so I can check the pressure without pulling off the tire cover. Yeah, I get it... first world problems. Side note, the display cycles screens back and forth to show the other 2 tires since it only has room to display 4 tires at once. After the display has cycled once you can hit the setup button to cycle the screen manually.The display shuts off after a certain amount of time unless you shut it off manually, this is based on when it last detects movement. Before the season started I kept the displays on my toolbox and they would both wake up when I either opened a drawer or put something on the box. Cool, they work as designed and would display the last values for the pressure and temp. The display uses solar power to keep the battery charged (or has a USB-C port for power). Now here is where the questions start... If the display times out it keeps the last values, if it's shut off then on, the pressure and temp memory is cleared and it waits for the sensors to wake up before displaying anything. This got me thinking... if the sensors wake up with the relearn tool and that somehow makes the range greater to ensure a good signal, does a dropped signal (because it's out of range) mean the display still shows the last reading? The answer is yes, unfortunately. Parking the camper, then going out somewhere means the display will still show the last pressures even when you're MILES away from the sensors.... with no alarm saying you're out of range. *Unless the spare tire alarm went off, in that case as soon as you open the door to get in, the display wakes up, and starts beeping because the spare signal was lost but all the other tires show the last values. Confusing.So as a better test I shut off the display then turned it back on while driving. On the car trailer the front axle showed up first followed by the rear, it took a hair longer to show everything but still reasonable I suppose. The camper is a different story. On powering up the front axle sensors would show eventually then a few miles later one of the rear popped up, by the time I arrived all 4 were showing, I didn't notice when the last tire showed up and don't think the alarm for the spare came back on.Overall I feel the Shrader add on kit is worth it if you know these limitations.

These are an awesome TPMS solution for older vehicles. So glad they are back in production by Schrader, I bought two sets of them. The monitor integrates well onto the dashboard without being intrusive.The solar monitor solution works great and maintains power very well. Very easy setup and installation. Having the tire pressure and added temperature function on the monitor is great, especially on longer trips.I have 10+ experience in the retrofit TPMS market, on my overlanding Landcruiser that my son and I travel 10-15K miles over the summers. I bought and used an alternative solution from a well known Australian Overlanding Solution company. That solution worked ok, but involved "External Sensors" screwed onto the standard valve-stems. They could leak if not put on properly, particularly if a "Service Technician" got anywhere near them (Ask me how I know...but they did alarm properly and saved the tires)The "Internal Sensors" with normal valve stems are way better in practical everyday use. If you need to top off the pressure, it is just the normal process. When your car is serviced, the Service Tech, can't screw up your sensors.Wish the monitor was a bit larger with bigger numbers (Font Size) for my somewhat older eyes, but that is only a nice to have "ask".