Mbrain DC 12V Portable Air Compressor - Digital Tire Inflator Tire Pump for Car, 140W 150 PSI

My Toyota Prius has slow leaks in both front tires. Tire specialist cannot find the leaks, but every four or five days they go from the 40 psi that they need to about 28psi. So I decided to look online for a small portable compresssor I could use. I researched, did some homework, read a bunch of reviews, and decided to go with the Mbrain DC 12V Portable Air Compressor. There is nothing that I don't like about this machine, except perhaps the fact that sometimes screwing on the compressor hose to the tire valves can be a bit tricky, the threads not always catching and threading well, but that may be my fault in freezing weather when my hands are not particularly good with very fine motor movements. Regardless whether I screw the hose on or just hold it, the compressor beautifully, quietly, and without overheating at all fills my tires. I really couldn't ask for more. It's tiny, super light, and perhaps because of that filling a low tire to a full one can take three or four minutes. But in ten minutes and with zero hassle I can fill all four tires. I am very happy with the machine and would recommend it to anyone.

Contrary to many others who complained about it burning fuses the first time of use, I had no problems. My suspicion is they did not follow the instructions: [1] Start engine, [2] plug into cigarette lighter, [3] then and ONLY then start the pump, place the hose on the valve cap cover. I had no need to even screw the hose to the tire valve cap. I securely held the hose tip to the valve and it filled properly. [That way I wouldn't lose tire pressure as can happen when unscrewing an attachment to the valve.]I personally did not have problems with it getting so hot that I burned myself. I filled up two bicycle tires and then four car tires. I didn't touch the heat sink, but the handle kept me far enough away to come in contact.The only thing I which was modified is the power cord length. For my car I was able to reach the front and rear tires on one side. But, it was a stretch to reach the back tire. I can see that on a longer car that could be problematic.

I have only used it twice. Once to air up my spare to 35 psi. It was pretty low at 17 psi when I started. The second time was to air up a tire on the vehicle that was 33 psi. Both times I set the pump to cut off at 35 psi. Both times it slightly overfilled them to 37 psi. Not a huge problem now that I know. Next time I will set it to a couple pounds lower and it should be spot on.This air pump is not particularly fast or particularly quiet, but it gets the job done. It comes with a nice zippered case that you can actually get the unit back in without any trouble. I'm not a big fan of the digital read out, but if this tire pump lasts 9 years like the Slime model I had, I will be happy.

UPDATE: 10/20/2019 := I have to apologize to the seller as they contacted me immediately and sent me a replacement unit. Unfortunately I didn't have a chance to test that unit immediately (as it happened previously), but WOW. It was my life saver during a 1500 mile trip I just took. For some reason, I took this (unopened) box with me... and at the middle of the night, three of my tire pressure started showing around 26-28 (where they supposed to be 35, mid size SUV). Thought to give a shot with this new unit - and it worked flawless - so had a peace of mind drive throughout.===========================Bought this a few months ago and hadn't had a chance to use it until yesterday. All I can say about this product is that, you can blow pretty harder through your mouth (or even - nose I assume) than this so-called machine. The one star I gave for this is - the LED light works. Stay away from this junk.

First off the 3 year warranty the company promises in the product description is a lie. The paperwork that comes in the box states it's a one year warranty. I tried to pump one bike tire with it and it crapped out at 70lbs never to turn on again. It supposedly will pump a tire up to 150 lbs. It's a complete piece of Chinese junk. In fact if you look closely at other ones there are several (most are cheaper) that are identical on Amazon. Identical with a different company name and a different price. Same exact thing. Just a different name. This was one of those purchases that sadly was a spider web waiting to catch flies. I'm trying to help you not get caught in the web now!

Nice, lightweight, and good amount of cordlength (if you use both the driver and passenger doors to get to both corresponding sides). It's pretty straight forward to use and didn't bother to read the manual, just know that it screws on to your the valve which rids you of having to keep adjusting it, that was a suprise but a pleasant one at that. It's got me from 15 to 40 in a little under 3 minutes which is not bad when you think about all the quarters you'd be popping in every 5 seconds if you were using an air pump at the gas station. It's worth the money incase of emergency and feels like it's sturdy enough to live long enough to be able to pay for itself in the amount qraurters you'll be saving from not using those pay to play pumps, which sometimes reach $2+. Comes with bag, and sports ball needles to increase it's value.

The unit works ... However, it takes forever to fill a tire. I had aired my tires down for some off-roading to 22psi .. Before getting back on the road I aired them back up to 45psi ... Each tire took 17 minutes ( I timed it) to air up 23 additional psi. It's not a bad compressor but don't be in any kind of hurry. I'm giving it 3 stars to be generous.Update: A representative of the company reached out to me. They sent a new compressor hoping it would be better than the first. It however worked just as well, no change. I still wouldn't suggest this product for your vehicle. Unless you have an hour+ to waste. It is for sports balls & bicycle tires at best.That said, the customer service Is great. I'd bump it up to 3.5 stars if possible for that reason alone if it would let me.

hose not high quality and light not great