I received my review unit a few days ago, and used that as an excuse to finally wash my car before taking pictures. The car I drive has factory installed TPMS, but having a second set of eyes does not hurt.
The box arrived in good condition, which is a fantastic start.
Unfortunately, the sensor itself was not centered in the box. I think the decision to use sticky pads to keep the ZUS sensor in place was a poor decision. There is no way that it will be able to stay in place during shipping and merchandising. My feedback here would be to use plastic tension clips on either side of the sensor to add a small amount of tension to keep it in place, rather than relying on adhesion on the bottom, and a plastic cradle that does nothing to hold the sensor in place.
This is what awaited me when the box was opened. Again, nothing was in its proper place, and it was a bit disappointing to see it like this. I'm not sure what the best way to keep these in place would be. Maybe having a small plastic plate with molded short screws that the sensors can be screwed into might keep them from rolling around. The middle section where it says "Installation Kit" was not secured, and this is likely due to the construction of the inner lining. The bottom part where the rear sensors are placed was leaning in such a way that it created a slope that caused the middle section to pop out of place. Altogether, these are fairly nitpicky problems, but it was distracting to see everything out of its place.
The sensors themselves are very nicely designed, and it helps that each is individually labelled. They are IP67, meaning they are dust resistant and water resistant up to levels a car should never be subjected to anyway. This is achieved through the use of a rubber seal that protects the internals from getting wet. This is great because my car has 16" high-performance brakes in the front wheels, and they produce ridiculous amounts of brake dust. I have some reservations on the thickness of the plastic used for the housing because it seems a bit thin, but I'm sure they will be strong enough to withstand most rock chips while driving at highway speeds. If the plastic were any thicker, the sensors would probably be too big. This makes me wonder if there will be issues with people hitting curbs and breaking them if they drive too close to a curb due to how much they can stick out of the wheel.
The ZUS sensor itself is beautifully designed, and is reminiscent of the wireless key fob for Tesla cars. The cord tethered to it ruins the aesthetic, but unfortunately, that is the world we live in. Having a battery powered wireless option would be nice, but I think it would be absolutely unnecessary and much too costly for the company to have two SKUs. I like the intuitive design of having 4 status lights at each corner of the sensor, making it easy to see at a glance which tire is having problems. I have it plugged into my car to pair it to my phone before going out to the garage ad installing the wheel sensors
The final part of the packaging is the installation kit, and despite the tacky plastic bag, it works. But, enough of the packaging, let's move on to the installation.
The installation itself was very straightforward. I decided to install the sensors on the left side of the car without the anti-theft rings and the right side of the car with the rings. This was to see if there was any potential difference. I can attest that the anti-theft rings do work, but not all of the time. On one of the wheels, I was able to remove the sensor easily despite having tightened the ring. On another tire, I could not get it off and had to use the wrench to loosen the ring, so I am glad that the anti-theft rings do work.
After installing the sensors, I turned the app on to see the initial readings. These were cold pressures, meaning I had the perfect temperature range to match the manufacturer's recommended settings. Ironically enough, I've had a small leak on my rear right tire for a few days, so I will be able to use the app to track any pressure loss before I get the tire patched or replaced. These were the initial numbers, but compared to my car's numbers, something seemed off.
As you can see, the pressures on my car are higher than those on the sensors, so I decided to use a tire pressure gauge to see which was more accurate.
The first picture is for the front left tire and the second is for the rear left tire. As it turns out, the ZUS sensor seems to be off by almost 2 PSI, which is a huge difference. The results seemed a little strange, so I decided to refill the tires to factory specs (38 PSI in front and 33 PSI in rear) and measure again.
After driving around the block for about two minutes, these were the readings I got. With the tires warming up, the pressures increased slightly, but the ZUS sensor was again lower by 2 PSI. Strangely enough, even though I intentionally inflated the front right tire to 38.5 PSI vs 38 PSI on the front left, the numbers seemed to have been reversed, while the sensor on my car was showing the proper levels. It's possible that the front sensors had the wrong covers on them.
As of right now, the sensors seem to be off by 2 PSI, but I will continue to monitor that over the next few days. The app itself works great and I had no problem pairing the sensors. It did take some time for all 4 tires to finally show a reading, but it seemed to be a reasonable amount of time. The only problem I have with the app is that it does not offer a way to set different recommended pressure levels for the front and the rear tires, which is important for some cars, such as mine.
With that being said, I am very excited to try out this product and feel that it is a great way for people who do not already have a TPMS installed to keep track of their tires. I do have some reservations about the packaging which I hope can be addressed, and I hope that the app is eventually updated to allow for setting different pressures for the front and the rears. Other than that, everything is very well done.
- Inconveniences - There were no problems with the installation process and it was very straightforward. For me personally, my rims have multiple spokes, so the space around the valve was very tight, making it difficult to use the wrench to tighten the anti-theft ring.
- App - Like I said before, it would be nice if the app had options to have different setting for the front and the rear. Two sensors needed time to show up after the initial installation, but it seems ok now.
- Manual - The manual is very well made. All of the information for installing, tips, specifications, etc. are easy to read and the illustrations are simple and informative. The added extra tips are useful, especially the one showing people how to check their factory pressure settings. Not many people know about this, so it's good to have in the manual.
- Pleasing points - I really like the design of the wheel sensors and the ZUS sensor. The UI of the app is also very nice.
As requested, here is where the sensor sits in my car. I don't have much space in the front of the car, but I have the sensor plugged into my ZUS tracker in the back and it sits in the ashtray. For those wondering, I drive a 2016 Mercedes-AMG C63S with 19" Michelin Pilot Super Sport tires: 245 offset at 38 PSI front, 265 offset at 33 PSI rear.