Viper Responder One (P/N 4203V)

Viper 4203V SuperCode 2-way Remote Start and Keyless Entry System with Two 1-Button Remotes

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2-way Remote Start System with Two 1-Button Remotes • Clone-Safe • Code Hopping Technology • Car Finder with Parking Light Flash • Multi-Channel • Designed for Fuel Injected, Automatic Transmission Vehicles

Learn more about the 4203v

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This item has been discontinued

Product Highlights

2-way Remote Start System with Two 1-Button Remotes • Clone-Safe • Code Hopping Technology • Car Finder with Parking Light Flash • Multi-Channel • Designed for Fuel Injected, Automatic Transmission Vehicles



Take A Chill Pill Or Get Things Heated Up

Remote start systems are the perfect way to cool down in the summertime. I don't know about you, but I hate getting blasted with heat when I open my car doors in the summertime. With the Viper 4203V Responder One, you can cool your car down BEFORE you get in and treat to yourself to refrigerated paradise in the summertime. Or, warm your car up so that it's nice and toasty in the winter time. Say good bye to freezing your hands on the steering wheel and say hello to toasty perfection. So get yours today and stop the suffering when you get into your car!

2-Way Paging

2-Way Paging

Send commands to your remote start or alarm system and receive confirmation that those commands were carried out. Obtain updates on your vehicles security status and get driver pages on the remote. If your vehicle is being tampered with, your remote transmitter will warn you and set off the vehicles alarm.

Remote Start Car Alarm

Remote Start

Allows a vehicles engine to active without physical contact from the user. This feature is useful for warming up your vehicles engine and transmission to operational temperatures. In cold climates you can have your interior hot or in warm climates you can cool it down before use. All of this can be done while in the comfort of your home or office.



Viper Responder One Features

  • 2-way Remote Start System with Two 1-Button Remotes
  • Not sure which model is right for you? Click Here to compare different Viper models
  • Remote start system with Clone-safe and Code Hopping technology
    • Prevents thieves from using devices that steal transmitter codes
    • Code-grabbers are used to intercept signals from the remote to the alarm
    • Thieves then use the hijacked signal to unlock your vehicle
    • Code Hopping encrypts the signal into millions of different code combinations
    • The alarm will reject any signal that has already been received
    • If a thief intercepts your signal and uses on your car, the alarm will reject the hijacked signal
  • Parking light flash for car finder feature
  • Multi-channel two-way receiver
  • Extreme capacity relays
  • Optional defroster output
  • Optional horn honk
  • Designed for fuel injected, automatic transmission vehicles
  • Valet mode features
  • 1-year warranty

Replacement / Additional Remote Options:

Also found as: Viper-responderone

Specifications & Details

General Features
Security System Type
Remote Start
Car Alarm
Remote Start
Keyless Entry
2-way Paging
with 2-way paging
Number of Remotes
Number of Buttons on Primary Remote
Main Transmitter Type
Sidekick Remote Transmitter Type
LED/Display Color
Number of Vehicles Supported
PC Programmable
Built-in Bypass Module
System Type
Replacement Remote Transmitter
Convenient Features
Panic Mode
Trunk Release
Valet Mode
Alarm Features
Paging Range
2,000 Feet
Shock Sensor
Two-Way Paging Features
Transmitter Alert
Interior Thermometer
Remote Start Features
Cold Start Timer
Turbo Timer
Compatible with Diesel Engines
Engine Start Intervals
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Item Details


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Customer Ratings & Reviews

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Amazing product

This remote start is an excellent addition to any vehicle. Its reliable, i use mine everyday and it never lets me down... Great for the cold mornings when u want to warm up your car in the morning without leaving your bed...

Highly recommended!!!

By Vman on February 7, 2013


found this helpful.

Viper the 4203

This one button two way is working excellent I would recommend this unit to everyone installed on car push start and other cars. Perfect but one thing is the range is not what is said. The range is about 600 feet max, I try to go farther, like 650 feet, is not working. The spec. said 2000 feet range, that is rate way too much off. The Range on this unit is about 600 to 700 feet max on the open field. I am a professional installer. Otherwise everything is good so far. Recommended to everybody.

By John on October 27, 2013


found this helpful.

Awesome Remote Start

Incredible distance on this remote. I sit in my walled office at work, point in the general direction of the outside windown, and it starts my car which I typically park way in the back of the parkng lot (to avoid door dings). To top it off, the confirmation tone is great for those unknown areas, which ensures you know if the car started or not.

Highly recommend this one for those that aren't looking to replace their existing alarm system or key fab.

By Dan on May 14, 2012


found this helpful.

Awesome starter

I bought this starter for my wife, because she just wanted something easy to work with it, and that's what this is. Very easy and reliable to work with, definitely will be another one, and will recomend it to all of my friends. Thank you for the service.

By Paulo on May 3, 2012


found this helpful.

Best Remote Start

I bought this as a remote start only, not as a remote to replace the one that came with my car originally. This is a very simple but effective remote start. It does not have a lot of other features to break so it is very durable. It consistently starts my car from inside a building across a large parking lot (3 football fields) in subzero temperatures.

It does NOT accidentally get started in my pocket.

Be aware that this does not come with installation in the price. To have it installed costs about $300, depending on your vehicle.

I would highly recommend this product.

By James on June 14, 2011


found this helpful.

The Best

My aunt bought this at a local car audio place and payed almost $400 for it and it is very accurate and responsive. I would reccomend

By Freddie on March 11, 2013


found this helpful.

Viper Remote Start

This is my 2nd Viper remote start, I would not hesitate to purchase another as the quality is fantastic. Highly recommend.

By Wendy on January 2, 2013


found this helpful.

Excellent Value for Those who already have Integrated Remote Door Locks from the Factory

I have had this product installed for 1 week now it is working excellently. It Product was delivered promptly and as described. Living in New England, having a remote start on my vehicle is a nice luxury through the winters. The remote has excellent range too! Yesterday I was at least 1500' away from my Subaru and the Viper system picked up the signal and had the car started and warming up well before I arrived. I did have have a friend who is a professional installer to put this in for me and it took him about 2.5-3.0 hours to complete. I can't rate on durability yet as it is only been in use for a week.

By Jeff on December 8, 2013


found this helpful.


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