Can you add keyless entry to 2008 toyota yaris

Have to sit right check on the other side.

left side at hood latch opener.

Look down under the fuse box or you could have electric power steering and you dont have to add fluid

Is this an issue with all 2008 HHR remotes??? Highly doubtful , probably the vehicles keyless entry system . Taking the vehicle to a qualified repair shop an having the keyless entry system checked for DTC'S - diagnostic trouble code's . Do you know what a DTC is ?
The keyless entry system is a vehicle entry device. The keyless entry system is used in conjunction with the body control module (BCM) to remotely activate certain vehicle features. Keyless entry will lock/unlock the doors, or release the rear compartment lid when a corresponding button on the keyless entry transmitter is pressed. This is accomplished by the transmitter sending a radio frequency to the remote control door lock receiver (RCDLR). The RCDLR interprets the signal and activates the requested function via a serial data message to the BCM. A low transmitter or vehicle battery or radio frequency (RF) interference from aftermarket devices, such as 2-way radios, power inverters, computers, etc., may cause a system malfunction. High RF traffic areas may also cause interference that could lead to a malfunction. Keyless entry allows you to operate the following components:
• Door locks
• Liftgate lock
• Remote rear doors (Panel only)
• Vehicle locator/panic alarm
• Illuminated entry lamps
• Remote vehicle start
The keyless entry system has the following components:
• Keyless entry transmitters
• Keyless entry antenna
• 2 Way Advanced Remote Start RCDLR
• BCM

Guessing will not fix this .

should be writen inside remote battery cover

36.2 in. effective length, 0.54 in. top width, 4 ribs. Here is where you could purchase one online:
http://www.carparts.com/details/Toyota/Yaris/Dayco/Serpentine_Belt/2008/DY5040362.html?TID=froogle&cpdasebe08toyotayaris20072009daycody50403621146828
Thanks!

This is only a guess but if you disconnect the battery for a few minutes this may reset your keyless entry. It will reset your clock and radio, etc. See if problem is listed in owners manual.
Good luck and thanks for your question and I hope my suggestions help. burdfrenzy
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If your keyless entry remote has never worked it either needs to be programmed to the vehicle or it is the incorrect remote part number for they vehicle. First step is to call your local dealership, ask for service, then verify your vehicle came equipped with the keyless entry option and verify the key fob part number. When calling the dealer have your vin# handy, they will need that. Once you have verified your vehicle has keyless entry option and you have the correct keyless entry remote part number then find a locksmith to program the remote to your vehicle. We suggest a locksmith because they are usually more affordable than the dealer and they come to you.

If your keyless entry remote has worked before and it just stopped working, here are a few tips to try to get it working again:

1) Change the battery
Batteries don't last forever, you'll be surprised how often it's just a dead battery! Search our YouTube channel on how to change a key fob battery for your specific year, make, and model!

2) Wipe the board
The board inside your remote can get a lot more filthy than you think! When the board is dirty it can prohibit the contact to the circuit board when you push down on the button. Simply wiping the circuit board off can make your key fob like new again!

3) Get it checked
Go to your local hardware store like AutoZone or Oreilly's. They usually have a RF frequency tester. This little gadget will let you know if your key fob is sending a signal. If it is, you may need to reprogram your key fob to your vehicle

4) The old car battery reset trick
I know this sounds absurd, but it works sometimes and is worth trying. If you exhausted all of the options above, disconnect both terminals on your car battery for 10 minutes. Then reconnect them and try your key fob. This has worked for many people and I have no idea why. If you do, please comment below to explain.

5) New fob!
It might be time for a new key fob! No need to dread over the expensive costs of a new key fob, at Keyless Entry Remote Fob Inc., you can get a refurbished one for a very affordable price! You won't even be able to tell the difference. Just search your vehicle make, model, and year to purchase a key fob or give us a call at 402-671-5100.

You can take it back to the dealer, and have them change the battery, or go to Autozone, buy the battery and do it yourself. They can show you how to do it. And which battery it takes. It's not hard to do. Good luck.