I did on my 2002 Limited three years ago. I used a Pioneer AVH-2300NEX, but I'm sure there are newer ones out that have more features if that matters. You'll need a dash kit, a wiring harness, the headunit, a camera and microphone if you want hands-free calling. Since you have a Limited, make sure you verify if you have the JBL system or not, as you'll need a different harness to complete the install. I learned that the hard way. Can't comment on installation fee as I did it myself, but I imagine it wouldn't be hard for any decent car stereo installer to pull it off. This has been one of my absolute favourite modifications to the car to this day, I miss it whenever I drive a different car.

 

Go to Crutchfield and look up what's available for your vehicle. Great company. They include the basic dash kit and wiring harness free with 99% of orders. You can upgrade to other install parts for a very reasonable price and offer FREE lifetime support for anything you purchase from them. Even though the inventory is low right now at least you can get a very good idea of what's out there and what you will need for installation. No, I don't work for them just a very satisfied customer for more than 30 years.

 

There are a few threads on this topic here in the forum. Crutchfield is a great starting point if you’re going to do it yourself. If not doing it yourself, visit your local pro car audio shop.
I installed an Alpine iLX-W650 head unit (no CD player, but has radio, bluetooth, Android Auto/Apple CarPlay, and camera inputs). The 7” screen provides a good display for a backup camera. I found a color matched backup camera on Amazon.
I purchased the Alpine from Crutchfield, as well as the wire harness and steering wheel control interface. I later bought a JBL amp bypass harness and new door speakers from them, as well.
Here’s my set up.

 

I've done same as above. I went with a android head unit and then purchased a $80 wireless autokit apple car play adapter for it. It's a great upgrade. I went with a camera with a built in radar too. I tried that color matching one in above post but for me the camera angle was off

 

We just purchased a 2003 Highlander Limited (AWD) for our son, and would like to have a backup camera installed. The original stereo was just about the only thing in this otherwise pristine vehicle that was pretty worn down, so we were thinking it might be nice to go ahead and replace that anyway. I figured if there was a way to take out the existing stereo and put in something that functions as both stereo and screen for a backup camera, this would be the place to ask.

Here’s what his current setup looks like:
View attachment 350363

Has anyone done this? If so, any brand recommendations, and can you give me some idea of what kind of prices we’re looking at to have it done? If it matters at all, we’re in Indiana.

Your (and was mine) best bet is to get the full Metra installation kit over at Crutchfield. I didn't buy the Kenwood head end unit from them but was still able to order the kit by entering the brand and model number of the new radio, then paying the higher price (> $90) for the FULL (inc. steering wheel button control interface ) install kit (no discount since I didn't buy the radio from them first). Depending on which brand of radio you buy/have will determine which Metra kit you will purchase - one size does not fit all! You are going to have some "bench work" to do also because the various cables must be connected together (solder & heat shrink is the best way) before you are able to connect to the original Toyo radio wiring and new head end unit. I bought the two antenna adapters on Ebay from SonixElectronix.com ("Metra 40-UV43 Male to two Female Universal Antenna" Y-cable and "Scosche MDAB Micro/Delco Antenna Adapter for Select 1988-2005 GM Vehicles"). The Toyo antenna power amp lead connects to and is powered by the new radio via one of the Metra cable wiring connections. If you install a backup camera, you'll need to tap into the Toyo's reverse light circuit (I made my connection in the wiring harness at the lower, left kick panel on the drivers side instead of back at the tail light.) Also for the option of a backup cam, you are going to need a hole saw kit to first cut thru the tailgates inner metal panel and then to cut thru the back of the fiberglass(?) rear latch/backup lights mounting panel. Wiring for my cam was run partially thru the headliner then down the passenger side, under the lower door sill cover plates and behind the glove box to the new radio. Again, the dual USB (2.0) socket (that replaced the cigarette lighter) and backup camera came from Amazon - you'll have to "pick your poison" depending on how big your budget is. All in all, this install cost me nearly $400 [2 years ago -$275 for the Kenwood head end unit, on sale)] and several hours of my time because I was extra careful and thorough, but it was worth every penny, blood, sweat and now smiles to me.

 

Your (and was mine) best bet is to get the full Metra installation kit over at Crutchfield. I didn't buy the Kenwood head end unit from them but was still able to order the kit by entering the brand and model number of the new radio, then paying the higher price (> $90) for the FULL (inc. steering wheel button control interface ) install kit (no discount since I didn't buy the radio from them first). Depending on which brand of radio you buy/have will determine which Metra kit you will purchase - one size does not fit all! You are going to have some "bench work" to do also because the various cables must be connected together (solder & heat shrink is the best way) before you are able to connect to the original Toyo radio wiring and new head end unit. I bought the two antenna adapters on Ebay from SonixElectronix.com ("Metra 40-UV43 Male to two Female Universal Antenna" Y-cable and "Scosche MDAB Micro/Delco Antenna Adapter for Select 1988-2005 GM Vehicles"). The Toyo antenna power amp lead connects to and is powered by the new radio via one of the Metra cable wiring connections. If you install a backup camera, you'll need to tap into the Toyo's reverse light circuit (I made my connection in the wiring harness at the lower, left kick panel on the drivers side instead of back at the tail light.) Also for the option of a backup cam, you are going to need a hole saw kit to first cut thru the tailgates inner metal panel and then to cut thru the back of the fiberglass(?) rear latch/backup lights mounting panel. Wiring for my cam was run partially thru the headliner then down the passenger side, under the lower door sill cover plates and behind the glove box to the new radio. Again, the dual USB (2.0) socket (that replaced the cigarette lighter) and backup camera came from Amazon - you'll have to "pick your poison" depending on how big your budget is. All in all, this install cost me nearly $400 [2 years ago -$275 for the Kenwood head end unit, on sale)] and several hours of my time because I was extra careful and thorough, but it was worth every penny, blood, sweat and now smiles to me.

What color of wires were the reverse light wires in the driver side kick panel? I will be installing a backup camera in 2007 Highlander and would like to know the wires you used please.

 

@carguy75 "What color of wires were the reverse light wires in the driver side kick panel? I will be installing a backup camera in 2007 Highlander and would like to know the wires you used please. "

On my '07 Highlander Limited, it was the PINK wire on the 14-pin plug / #10 position (Left plug & socket in the picture). I carefully removed about 1/2-inch of wire insulation from this PINK factory wire, soldered on the reverse trigger wire from the Kenwood wiring harness (purple wire), then covered this new splice with electrical tape and secured it with a cable tie to prevent movement. Do not use one of those blue crimp-on wire splice connectors! Those damage the copper conductor inside this wire and leaves the splice open for corrosion to begin.

 

Thank you.

I am deciding on using wireless backup camera adapters to avoid running wires from the dash to the rear hatch. The issue I had with that idea was that the aftermarket radio will need a reverse wire trigger. The camera only need a 12v power source tapped from the taillight reverse light wire. Now I can just connect my aftermarket radio to the reverse lead in the dash, so the wireless method may actually work now.