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Viper 4204 Responder LE

2-Way Remote Start System w/ Keyless Entry


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This item has been discontinued

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4204x thumbnail

Clifford Matrix Responder LE 420.4X (4204/X)

OUR PRICE: $89.99

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Viper 4204 Responder LE

2-Way Remote Start System w/ Keyless Entry


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Viper 4204 Responder LE Features:

  • Remote Start System and Keyless Entry with One Responder LE 2-Way Remote and One 5-button 1-Way Remote
  • Not sure which model is right for you? Click Here to compare different Viper models
  • 2000 Foot range
  • 2-Way confirmation through GhostLight indicators
  • 24-Channel remote start
  • Transmitter frequency: 434 MHz
  • Clone-Safe™ and Code Hopping™
  • New Priority™ user interface
  • Control Center™ with integrated Status LED and Valet Switch
  • Active temperature check
  • DC Operating Voltage: 9.5 to 16 volts
  • Operational Temperature Range: -68F to 176F
  • D2D serial data interface for Xpresskit D2D modules
  • XpressPort dock for Xpresskit docking interface modules
  • Compatible with Viper SmartStart Module (VSM100)

Keyless Entry:

  • Comfort Closure (windows)
  • Super code
  • Flex Relays
  • 2-Car operation
  • Parking light flash
  • Bright blue status LED
  • Silent lock/unlock


  • Dome light supervision
  • Door trigger error notification
  • Horn Honk
  • Car finder
  • Trunk release
  • Valet Mode
  • Rear defogger on/off
  • Optional panic feature

Remote Start:

  • Advanced remote start functions: Timer Start, Smart Start, RunTime Reset
  • Manual transmission mode
  • Diesel mode
  • Virtual Tach™ RPM sensing
  • Turbo timer
  • Diesel timer
  • Anti-grind feature(ignition starter)
  • 4 User recognition
  • 4 Auxiliary outputs
  • 1-year warranty

Replacement / Additional Remote Options:

Note: SmartStart does not function in Canada.

Also Found As: 4204v

Product History:

Clifford 480.6X thumbnail
(newest, current model)
Clifford 420.4X thumbnail
(previous model, replaced by Clifford Matrix 4806X)
Viper 4204 thumbnail
(previous model, replaced by Clifford Matrix Responder LE 420.4X (4204/X))

General Features

Security System Type
This indicates whether the product is a security car alarm product, remote start module, or a combo unit that offers security with remote start features.

Security: This means that the car alarm system is just that. No bells and whistles, just a car alarm system.

Remote Start: when installed, this allows the user to start a vehicle from a remote location. Remote start modules and security with remote start alarms often require an additional vehicle specific bypass module to complete installation.

Security with Remote Start: This means that the system incorporates both features listed above.

Remote Start
Car Alarm
If "Yes", the system will have alarm security features to help prevent vehicle theft and tampering. Remote start modules without alarm features will have "No" for this value.
Remote Start
If the alarm or remote start module has "Yes" for this value then the system has an electronic device that allows you to start your vehicle by remote control without actually being inside the vehicle or using the key. The remote start system supplies the vehicle with power and simulates a start just as if you were inside using the key. Select vehicles require additional accessories or immobilizer/bypass modules to use the remote start feature.
Keyless Entry
Keyless entry allows you to remotely lock, unlock, and open the trunk of a vehicle if that is equipped with power door lock motors (actuators) and power truck motor (solenoid). Door lock controls via the remote are found on nearly all of today's car alarms.
2-way Paging
Alarms with 2-way paging inform the user via remote vibrating/audible/visual alert when the alarm is triggered. The pager must be within range to receive the transmitted signal.
Number of Remotes
The number of remotes included with the alarm system purchase.
Number of Buttons on Primary Remote
The amount of buttons on the Primary Remote generally equals the number of functions that you can use your remote for. Some remotes have auxiliary buttons which can perform more than one task per button.
Main Transmitter Type
LCD and OLED transmitters display various screen savers, warnings, alerts and other features on the face of the remote, rather than first generation button-only transmitters. They provide more information typically and other features.
Sidekick Remote Transmitter Type
Some car alarms and remote start systems come with more than 1 transmitter, which is referred to as the "sidekick" transmitter. Most LCD/OLED systems come with a button-only sidekick transmitter, while select units come with an additional LCD/OLED transmitter.
Number of Vehicles Supported
Some higher end car alarm systems can support multiple vehicles. This is the number of vehicles that the works with.
Number of Auxiliary Outputs
The number of auxilary outputs that the car alarm system supports. These outputs are left over from the total number of channels. They can be used to add on other options or additional features to a vehicle.
PC Programmable
Custom, advanced programming options through one or more of the following: PC, Pocket PC, PALM Pilot, Valet SW or Remote Transmitter allows for advanced controls of your alarm's functions.
Built-in Bypass Module
System Type
This refers to the type of remote start system, whether it is an add-on or a complete kit.

Convenient Features

Panic Mode
Panic mode allow the user to be able to set off the alarm from the remote.
Trunk Release
The trunk release option allows for integration and control of the trunk latch. Additional parts may be required.
Valet Mode
Valet mode is a car alarm setting that adjusts system to less sensitive settings when allowing a valet to park your car and similar settings.

Alarm Features

Paging Range
The maximum distance that the car alarm system will work with the wireless remotes.
2,000 Feet
Most car alarms come with a siren that can be installed. The siren will sound when the car alarm is triggered the alarm goes off.
Shock Sensor
The shock sensor is designed to trigger an alarm on light or heavy impacts and vibrations (standard sensor included with most alarms).

A dual zone shock sensor is a feature of proximity and shock sensors only. Zone 1 ( light impact on shock sensor and short motions(adjustable) on proximity sensor) will trigger warn away chirp to warn intruder that car has an alarm without setting off the full alarm. Zone 2 (heavy impact on shock sensor and extended motions(adjustable) on proximity sensor) will trigger the alarm to “go off”.


Two-Way Paging Features

Transmitter Alert
The is the way that the transmitter, or remote can communicate alerts to the user.
Interior Thermometer
Some of the higher end car alarm systems are able to detect the temperature of the cabin. The temperature can then be displayed on the remote.

Remote Start Features

Cold Start Timer
Great for those on a set schedule who need their vehicle to warm up at a specific time every morning for example.
Turbo Timer
Some remote start systems have turbo timer feature which allows the vehicle to run for a specified amount of time after exiting vehicle. In turbocharged vehicles this prevents hot oil in the engine from choking up in the lines. Hard driving can raise engine oil temperatures to dangerously high levels. Proper cool down is essential for a healthy turbo and engine.
Compatible with Diesel Engines
This means that the remote start system will work with diesel engines.
Engine Start Intervals
Some remote start systems offer feature to protect your engine. The engine start interval feature will start the car at particular time intervals or when the engine has reached a certain temperature. This feature prevents the engine block from freezing.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating



Great remote start

September 3, 2012

Very please with viper remote start system. The range on it is amazing the 2way is well worth it. It works very good with manual cars with no problem.

12 of 19 found this helpful

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mchenry , Illinois

viper remote starter

August 20, 2013

This product is very good does everthing I expected and more. I would recommend this item if you would like to warm your vehicle in the wintertime without haveing to go out in the cold to do so. The car is nice and warm when you are ready to go out no need to freez.The best part is you can get ready to leave for the day while warming the car and nit have to trow something warmer on just to go outside to start the car in the freezing moring weather. The item deliverd very fast and in working order. I would reorder from thus company again.

13 of 24 found this helpful

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austin tx

great product

March 27, 2013

everybody i talk to loves the idea of having a warmed up car to jump into not to mehtion door locks

8 of 18 found this helpful

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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Viper 4204 Responder LE