AutelOBD2 Scanner MaxiDiag MD906 PRO, All Systems Car Scanner Diagnostic Tool, 11+Resets Code Reader with CAN FD, Same as MD909 PRO Lite of MaxiCOM MK808S, Up of MD808 PRO MD806, Free Updates, FCA

To those who gave this unit one star because you couldn't be bothered to contact customer service to get things figured out: get a life.This scan tool does more than any other scan tool on the market and it does it with flying colors. I've used scan tools from Innova, Actron, OBDLink and other companies, and they don't even come close to the usability and functionality of this tool.You can do live scans, make-specific scans, generic scans, scans on the powertrain module, transmission module, ABS module, body module and more. I've done scans on 1998 Volkswagons through 2013 Audis and it has NEVER failed me. I've probably scanned 50 different cars from the USA, Europe and Asia in the 7 months that I've had this and it is by far the most thorough tool on the market. It catches things that don't even show up on the highest-priced Innovas (even if you use their over-priced make-specific flash modules.) This tool uses software from the MaxiDAS, which many pro mechanics use, so what you're essentially getting is the scan capabilities of the MaxiDAS without the bi-directional capabilities.I was fortunate enough to purchase this right when it came out and was priced around $220. It's since gone up in price significantly, but knowing what I know about this tool, it's still worth what they charge. Now that I'm using the MaxiDiag MD802, I wish I hadn't bought the OBDLink OBD-II USB Scan Tool Interface Adapter (425101), which after spending $$$ on the tool and the pro-upgraded software, actually ended up costing me quite a bit more. The OBDLink and the pro software only churns out generic info and is so much less capable than the MaxiDiag, that it never leaves the cart anymore.The Autel MaxiDiag finds issues that you will never find using a generic tool, inlcuding factory Bluetooth issues, lock switch problems, factory-specific ABS faults, etc. It lets you clear just about every code your ECU can come up with. This is a very important feature since on some makes, such as Hyundai, you need to clear the codes after you do the fix or the car will continue to think there's a fault and it will not work properly until the code is manually cleared. This is now becoming a common thing with manufacturers since they want you to take your car to a dealership, where it costs $120 just to use a factory tool to clear a code, which only takes a couple of minutes. In this regard alone, the MaxiDiag paid for itself after about four uses.For the sake of full disclosure, I was having a problem updating my scan tool the first time I tried Autel's Auto Update software. It was admittedly my fault, since I didn't follow the instructions in the manual exactly as written. I got in touch with Autel customer service and they fixed it in a day. You can't ask for more than that. The updates have been super easy to do and as of today, I'm running V2.0 of all the makes. There are 47 different makes represented on this tool, if I recall correctly, including Dacia ("GOOD NEWS!"), GM, Ford, Ford (Europe), Toyota, Nissan, Subaru, Holden, Ferrari, Lancia, Chrysler, Suzuki, Fiat, Mercedes, Audi, Volkswagen, Honda, etc. etc. etc.I can't really think of anything bad to say about this tool. It's easy to use, professional grade and to be honest, it's a bargain when you compare it to the next closest thing out there that has the same capabilities.EDIT (November 2016):I've loved using this tool for the past few years. Autel has done a really good job with the software updates and its website is finally up to the level that this tool deserves. I recently paid $100 for another year's subscription to tool updates and am running Version 6+ on pretty much everything (meaning it's good on most vehicles up to the current model year.) As a scan tool, I still think this product is hard (if not impossible) to beat for the price. Since the tool originally came out, Autel has added additional functions like oil change light reset and several other handy functions. Five stars all the way.

Full System, All System, Four System, what is it!!! I read the reviews, the Amazon write-up, and the Autel website propaganda. Amazon's descriptions and pricing seem to add to the confusion. Autel customer service helped, a little. According to Autel, they DO NOT sell online, so any Autel code reader bought online is basically a knock-off and could be anything. Further, any sold by a store in the US is legitimate, and is the "all system" version. Autel does not sell the others inside the US.This model is about $150 cheaper than the "all systems" unit on Amazon, as well as those in the auto parts stores (the "real" ones).I needed a code reader and have had generally good support from Amazon, so figured I'd risk it, and send it back if necessary.Some have mentioned that the website would not recognize their unit, or that the updating was painfully slow. This is what I did (mostly, followed directions in the manual, which you can download from Autel's site before you buy):1. created an account on the Autel website (don't need any information regarding the unit to create an account)2. registered the unit (with info you find at "setup/about" when you connect it to your PC to power it up)3. copied the entire SD card (92,XXX files, 3.77 gigs) to my hard drive for a backup4. copied all those files to a 32 gig card (much more than I needed, but some mentioned the supplied SD card was too small)5. verified that the unit and website were happy with the substitute card6. updated - yes it is slowI don't know enough to determine if it will do everything it's capable of, but I suspect it does. I've used it to scan and clear codes on a 99 Neon, to scan and collect live (driving down the road) data on an 07 Yukon, and attempt to scan an 05 Crossfire. The Crossfire is supposed to require equipment that only some authorized dealers have, but I got a basic scan, and the machine found no trouble codes. What the machine told me matched well with known information for the Neon and Yukon. It did not correctly identify rat damage on the Crossfire.I am happy. Lots to learn now.One significant issue. Although the unit looked new, I had to use needlenose pliers to remove the SD card. It had been forced in upside down (relative to the correct position, at least). It appeared to have no damage. It had been used to collect data on a Benz, and when I registered it, I did get a full year access to updates, but only six months warranty. Amazon (NOT another seller) sold me a used unit. That's disappointing, but I risk all the problems again if I send it back. Will update if I have possibly useful info.UPDATE 23 JUL - one email to Amazon, full warranty period will be honored. Issue resolved easily. Much less trouble than returning it.Many potential problems discussed regarding this machine; not have materialized for me.Sorry, forgot to mention - I downloaded the PC suite software from the Autel site, which seems only to let you update (that's important), and PRINT. Some mentioned no success printing. I connected the unit by USB cable and could print from it to the screen, basically a text file. That I could cut and paste and do simple edits, and copy it to a Word file. So, you can generate a printed record and save to an editable file. That's all I know so far.