The 2007 Hyundai is not listed in my master reference guide so there is a possibility that it is a special Hyundai blade. Most manufacturers have agreed on 1 of 6 different rear arms and there's a possibility that Hyundai didn't conform.
In General...
1. Buy the correct-fit replacements. You may have to go to your dealer or do a thorough online search.
Remember, correct replacement windshield wiper blades are not only correct length, but also correct attachment. Never just buy by length only. Always lookup your vehicle in an application guide at the store or now-a-days you can 'lookup wiper size' online. The key to an easy install is correct size/correct part numbers.
2. (normally) The new replacement wiper will have step-by-step, illustrated instructions for removal and installation. Take your new wiper blade and instructions out to your vehicle and physically get the old and new wipers in your hands and take a look. The instructions will make 100% sense once you're looking and touching them. (again, since this may be a Hyundai proprietary arm and blade, it may be more difficult)
The 2005 Hyundai Tucson has a proprietary rear wiper blade that you can only get at the dealer. While buying the part, ask for assistance/instructions on how to change it. You may also want to check your manual.
The rear wiper blade is a 20". It would really surprise me if the 2007 took a 20" blade, I know the 2005 takes a 12" blade. This is a special Hyundai rear wiper blade and you must go to the dealer to get it. See sources and related links below for information on the front wiper blades. P/N - 98820-2E000 - about $12 at the dealer
The 2008 Hyundai Tucson wiper blade sizes are 24" drivers and 16" passenger side wiper blades. See sources and related links below for more information. Since there are over 22 different wiper arm attachments, do not buy wipers just by length only. Be sure to lookup exact wiper blade part numbers by vehicle make, model and year for the brand wiper you decide to purchase. This ensures correct length AND correct attachment.
Most if not all Hyundai Sonatas have hook end wiper arms which are easy to change, replace, remove and install. See sources and related links below for installation videos. Also, purchase the replacement blades first and there will be additional instructions/illustrations on the replacement packages. Locate and press the tab or button where the wiper blade is inserted into the hook of the wiper arm and pull wiper blade out of hook. You may have to rotate and flex the blade to make enough clearance for the hook to pass through.
To change the wiper blade on a Peugeot 306 unclip the old part from the mount. Take the new wiper blade and slide it into place until it clicks.
You can change the wiper blades by removing the retaining clip to the wiper blade arm. The wiper blade will come off and can be replaced.
I am going with the assumption that question is "how do you change the wiper blade (blade and frame)", not "how do you change the rubber blade (wiper refill)", and not "how do you change the wiper arm". Wiper Blade = The wiper frame that attaches to the wiper arm including the rubber blade. 1. Step 1 is to be sure you get the right replacement wiper blades. The 1992 Ford F-Series Pickup (including the F-350) takes 18" wiper blades on both sides front.
That rear wiper blade is only available at the dealer (there are no aftermarkets available). So, when you go to purchase the wiper blade, ask them for replacement instructions.
The 2005 Hyundai Sonata has hook-end wiper arms. See the Sources and Related Links section below for wiper blade installation videos and correct attachment/length wiper blade sizes. Also, if you purchase the replacement blades first and there will be additional instructions/illustrations on the replacement packages. Locate and press the tab or button where the wiper blade is inserted into the hook of the wiper arm and pull wiper blade out of hook. You may have to rotate and flex the blade to make enough clearance for the hook to pass through. Very simple.
get a mechanic
The way to change a rear wiper blade on a kai sedona would be to take the vehicle to an auto mechanic or an auto body shop and let them change the wiper blades on the vehicle.
It will depend on if your rear wiper looks like a traditional wiper blade or if it looks like a newer, fancier wiper blade. If traditional looking then watch "hook arm" video. If a newer-style wiper blade then watch "xx-E video".