EZoneTronicsUniversal Solar Power TPMS, Wireless Tire Pressure Monitoring System with 4 DIY External Cap Sensors (0-5Bar/0-99Psi), Real-time Displays 4 Tires' Pressure and Temperature

Edit After two months use: I have had to deduct more stars from this review. Having been able to reliably and accurately watch the pressure in my FR tyre slowly drop, I came this weekend to top it back up. Except two of the sensors have completely seized onto the tyre valve. After lashings of GT85, pliers, grippy gloves and lots of swearing, I managed to get one off. The other is still holding firm though. I expect I'm going to need a new valve and may never recover the sensor. Moral of the story - it is ESSENTIAL to apply some grease to the threads on the tyre valve before fitting these sensors!!My alloy wheels are a little worse for wear and one in particular sporadically loses it's pressure. I have wasted a couple of tyres on it now after inadvertently driving on too low pressure and damaging the side-walls. This £40 gadget means I can more easily keep the pressure topped up and can save money to one day replace/refurb the wheels instead of having to prematurely replace tyres!!The device does the job, although instructions leave a lot to be desired. I managed to work it out eventually, but not before lots of head-scratching.Part of setting the device up includes 'teaching' the unit which sensor is on which wheel (which begs the question why they need FR,FL,RR,RL emblazoned on them so boldly). I don't recall exactly what the instructions said - "apply vent" or something - basically, unscrew the dust cap slightly to release some air! The device peeps and move onto the next wheel.Using the device is simple enough, turn it on, allow a few moments for readings to be made (which can be done on the move) and turn off again.Sometimes it can take a few minutes for a reading to come through (often I find travelling forwards at slow speeds gives the quickest readings) it's usually possible to work out by comparing individual tyre temperatures and outside air temperature if you car has a gauge for that, and work out whether the readings are accurate or still updating.Even in bright sunlight, the unit's battery level drops while it's left on. Simple enough to turn it on at the start of a journey, let it take readings and then turn off.In terms of accuracy, I'd say it's pretty spot-on. The temperatures tend to match the cars thermometer after it's been sat, and the pressures match the reading given by a pressure gauge or compressor when I have come to top them up.I also found the anti-theft nuts completely redundant. I followed the instructions but fail to understand how they could prevent the sensors being stolen if someone wished to do so. In the end they are more of an inconvenience as they will prevent an air line being tightened onto the valve stem without the nuts being removed too - often after they have seized with road grime and require a spanner to be loosened. I'd be happy to amend my score & review if someone could explain to me what I am doing wrong here or how they should work (in plain English!)

I quite liked this product, but the description is somewhat misleading. It appears to state, as part of the title, that it is for 0 to 99Psi and in the description is says " can work with any cars and trucks". However this pressure range is just for the cap sensors and not the actual unit. My tyres are inflated to 72Psi at the front and 76Psi at the rear. These values were displayed on the unit quite correctly. The problem is that on the unit you have to set a maximum Psi, after which it sounds an alarm. This maximum can only be set to 72Psi and no higher. Result is that the alarm is constantly sounding and the display flashing. It is not usable. For normal car tyres this product would be just fine, but for mine it is not. A little more information would have saved me a lot of trouble.

I was going to give this product a 5 star rating, however, 17 days after receipt/fitting and one of the valve caps totally failed mid journey.The fault appears to be simply a battery failure.I like the unit not to big on the dash and live tyre pressures/temperatures, all very good.I'll report back in the future on the units reliability as time goes on.The error appears to be with the communication between the main console and the RR sender. No changes to the RR dash readout and then keeps dropping same sensor every 30 minutes. Have to turn off the main unit, then back on, for 30 minutes. Off it goes again...Nothing further to add to this, returning unit complete.

Had this on my vehicle for 7 months and worked perfectly. One sensor then failed and I tried changing the battery but nothing. Contacted seller and they immediately sent me a complete new kit within a few days. Now all back to normal. Great product for the price and customer service second to none.

not very good, worked OK for about 4 weeks, now the monitor on the right rear tyre has stopped working, cannot find the address of the shop selling them and cannot get through to Amazon customer care

Ordered this and works exceptionally well, 8 months later I ran over a screw and couldn't get a sensor off so I accidentally broke it, got in touch with Ezonetronics asking them to replace a sensor in which I am willing to pay for, without hesitation they sent me a whole new kit, unbelievable, highly recommended, buy this item, a life time guarantee.

Did what was promised.

Easy install. Have it three months and on all the time and it shows full charge from the solar. So no wires needed