I have several friends that are decent mechanics but will not tackle a remote start installation themselves. The fact they know me is probably more of a factor than ability. When they look at the number of vehicle connections required I guess it scares them away. If you are not comfortable with the installation I would recommend paying a shop/installer to do it. Better to pay a little up front than a lot in repair costs later.
With that being said, the US version of the 06 Elantra does not have a transponder key, if the vehicle came with factory keyless entry the door locks are negative trigger, and everything is available without having to go into the doors. It is a straight forward installation with nothing truly complicated to interface. According to my sheets if the car is equipped with a factory alarm there is no way to arm it from an aftermarket system. To disarm the system the car needs to see ignition, accessory, and keysense. However if you discontinue using the factory remotes once the system is installed this should not be a factor.
Here is what Audiovox lists on their tech sheet for the 06 Elantra:
#509618: 2006 HYUNDAI ELANTRA 4DR HATCHBACK
Audio/Mobile Video
WIRE COLOR POLARITY LOCATION
Battery LIGHT GREEN (+) RADIO HARNESS
Accesory BROWN (+) RADIO HARNESS
Ground BLACK (-) RADIO HARNESS
Illumination DARK GREEN / WHITE (+) RADIO HARNESS
Dimmer DARK GREEN/ BLACK (+) RADIO HARNESS
LF Speaker (+) GREEN/ RED
LF Speaker (-) LIGHT GREEN / WHITE
RF Speaker (+) RED / BLUE
RF Speaker (-) LIGHT GREEN/ BLACK
LR Speaker (+) YELLOW/WHITE
LR Speaker (-) YELLOW/BLUE
RR Speaker (+) GREEN
RR Speaker (-) GREEN/ BLUE
Radio Security YES
Security
WIRE COLOR POLARITY LOCATION
Battery YELLOW/BLACK (+) IGNITION SWITCH HARNESS
Ignition 1 BLACK/ WHITE (+) IGNITION SWITCH HARNESS
Starter 1 YELLOW/RED (+) IGNITION SWITCH HARNESS
All Door Trigger YELLOW (-) IN PLUG IN DRIVERS KICKPANEL
Trunk Trigger BLUE / YELLOW (-) IN HARNESS IN DRIVERS KICKPANEL
Parking Lights GREEN / WHITE (+) IN HARNESS IN DRIVERS KICKPANEL
Convenience
WIRE COLOR POLARITY LOCATION
Headlights-Lo RED / YELLOW (-) AT VEHICLE LIGHT SWITCH
Trnk Release YELLOW/BLACK (+) AT TRUNK RELEASE SWITCH
Remote Start
WIRE COLOR POLARITY LOCATION
Battery YELLOW/BLACK (+) IGNITION SWITCH HARNESS
Ignition 1 BLACK/ WHITE (+) IGNITION SWITCH HARNESS
Ignition 2 BLUE/BLACK (+) IGNITION SWITCH HARNESS
Accessory 1 BLUE / YELLOW (+) IGNITION SWITCH HARNESS
Starter 1 YELLOW/RED (+) IGNITION SWITCH HARNESS
Key Sense RED / YELLOW (+) IGNITION SWITCH HARNESS
Tachometer BLUE/WHITE (AC) AT IGNITION COIL
Speed Sense YELLOW/WHITE (AC) IN HARNESS IN DRIVERS KICKPANEL
Parking Lights GREEN / WHITE (+) IN HARNESS IN DRIVERS KICKPANEL
Brake Lights GREEN (+) AT SWITCH ABOVE BRAKE PEDAL
Reverse Lights RED / GREEN (+) IN HARNESS IN DRIVERS KICKPANEL
Modules
WIRE LOCATION
Please select another category
Doorlocks/Windows
WIRE COLOR POLARITY LOCATION
Power Unlock PINK (-) DRIVERS KICK
IF THE VEHICLE DOES NOT HAVE KEYLESS ENTRY THEN YOU MUST INSTALL AN ACTUATOR TO PROVIDE POWER LOCKING FEATURES.
PowerLock YELLOW/ORANGE (-) DRIVERS KICK
OR BLUE IF THE VEHICLE DOES NOT HAVE KEYLESS ENTRY THEN YOU MUST INSTALL AN ACTUATOR TO PROVIDE POWER LOCKING FEATURES.
Note: Audiovox makes no representation or warranty with respect to the above information including its accuracy, completeness, or its freedom from third parties' proprietary rights. Audiovox disclaims all liability or responsibility for errors or omissions therein or any decision made by the recipient in reliance thereon. The installer must verify any circuitry with the proper test equipment prior to installation.
Compare what is listed in this information with the installation instructions for the system. See if it is something you would want to tackle on your own. In my opinion this is a decent vehicle to do yourself but only you know how comfortable you are with your particular skill set. I only recommend soldering the connections to ensure long term reliability so that may be a factor for you as well. Keep in mind the tech sheet is just a guide and you must verify all of your connections with a DMM prior to hooking anything into the factory wiring.
Installer, IT support, and FFL. I need less hobbies.