Expert Service 1-877-289-7664 [Hours]

Fall Audio Savings

Clifford Matrix Responder LE 5204X

2-way Hybrid Car Alarm Remote Start Vehicle Security System w/ Keyless Entry


We apologize

This item has been discontinued

Item Added to Cart

Clifford Matrix Responder LE 5204X

2-way Hybrid Car Alarm Remote Start Vehicle Security System w/ Keyless Entry


Keep Shopping

Get Added Peace of Mind with SquareTrade

Why SquareTrade?

  • The #1-Rated Protection Plan
  • 5-Day Service Guarantee & Free Shipping
  • Protection from Normal, Everyday Use
You have added a warranty
Add Warranty
3 years of protection


Home and Auto Digital Multimeter



1mm All Purpose Solder



Don't see the accessory you're looking for?
View all available accessories for the Clifford Matrix Responder LE 5204X .

Get FAST answers from customers ASK a Question See questions answers

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.

Keyless Entry

Keyless Entry

Performs lock and unlock tasks without physical contact with the vehicle. Power door locks can be controlled from several feet away or even within a building using a remote fob. The fob emits a radio frequency that is digitally encoded to prevent frequency stealing so no one can enter into your vehicle without your wireless transmitter.

Dual Zone Shock Sensor

Dual Zone Shock Sensor

This shock sensor utilizes warning chirps for minor disturbances and will trip the alarm if it detects more serious impacts or disruptions. Most dual zone shock sensors have adjustable sensitivity to reduce false alarms or warnings. These sensors let would-be thieves know that your vehicle is equipped with an advanced alarm system and to keep away.

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.

Dedicated Trunk Release

Dedicated Trunk Release

This unit comes with trunk release capability and remote control integration for OEM alarm or add-on trunk release systems. Pop your trunk using your remote transmitter for convenience and ease of use. Carrying a handful of groceries? Arms tied up with luggage? Pop the trunk without using your key so it’s open and waiting for you when you arrive.



520.4X Features:

  • 2-way Hybrid Security and Remote Start System
  • Not sure which model is right for you? Click Here to compare different Clifford models
  • Built-in Turbo Timer
  • Includes One LED 2-Way Transceiver, One 5-button Transmitter
  • Confirms commands and system triggers using flashing LEDs
  • Super Bright LED System Status Indicator
  • Extreme 2,000 feet FCC legal 2-Way range
  • Real Status using GhostLights – check the vehicle temperature and run time remaining using the LEDs on the remote
  • 4 Auxiliary Outputs
  • 24-channel remote start / security / keyless entry system
  • Anti-Grind
  • Dome Light Supervision
  • Defroster Output
  • Horn Honk
  • SuperCode
  • Stinger DoubleGuard Shock Sensor
  • Revenger Six-Tone Siren
  • Parking Light Flash
  • Built-in XCR (Extreme Capacity Relay Satellite)
  • Comfort Closure
  • Failsafe Starter Kill
  • Manual Transmission remote start enabled for the millions of stick shift vehicles
  • 1-year Sonic Electronix Warranty

Replacement / Additional Remote Options:

Clifford Model Comparison

Model Security Remote Start Keyless Entry 2-Way Main Remote Type Range Secondary Remote Channels Trunk Pop
5904x LED Screen Up to 1-Mile 5-Button, 1-Way 4
5704x LCD Screen Up to 1-Mile 5-Button, 1-Way 4
5204x 5-Button 2000 Feet 5-Button, 1-Way 4
5104x 5-Button, 1-Way 2000 Feet 5-Button, 1-Way 5
4704x LCD Screen Up to 1 Mile 5-Button, 1-Way 4
4204x 5-Button 2000 Feet 5-Button, 1-Way 3
4203x Unlock ONLY 1-Button 2000 Feet 1-Button N/A
4104x 5-Button, 1-Way 2000 Feet 5-Button, 1-Way 3
3305x LCD Screen 1500 Feet 5-Button, 1-Way 2
3303x LCD Screen 2000 Feet 5-Button, 1-Way 4
3105x 4-Button, 1-Way 1500 Feet 4-Button, 1-Way 2
3102x 4-Button, 1-Way 1/4 Mile 4-Button, 1-Way 5

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.

Keyless Entry with 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.
Button(s)-only with LED Lights
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 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.
Smartphone Compatibility
These are the types of smartphone systems that the car alarm system is compatible with.
GPS Tracking
These car alarms enable a user to track the position of the vehicle using GPS satellites.
Professional Installation Recommended
This will indicate whether or not we recommend going to a professional installer for this item. Some items have complex installations that should only be done be professional certified installers.
Built-in Bypass Module

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.
Compatible with Manual Transmissions
This means that the remote start car alarm is compatible with manual transmissions. Please see the item description, manual, or your professional installer for more information as to how this feature will work with your specific vehicle.

Specials with this Item

Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!

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


tacoma wa

very good product

November 14, 2013

awesome remote starter alarm great value now i start my truck with the touch of a button from 200 feet a way best value ever

7 of 18 found this helpful

Was this review helpful to you?

Accessory Tools and Products

Accessories added


Home and Auto Digital Multimeter

Your Price $17.99

Soldering Iron

Soldering Iron with Ceramic Heater

Your Price $14.99

Wire Stripper

Heavy Duty Wire Stripper & Cutter

Your Price $11.99

Wire Crimper

2 in 1 Wire Quick Splice T-Tap Crimper and Wire Cutter

Your Price $14.99


1mm All Purpose Solder

Your Price $8.99

Quick Disconnects

100 Pack of 22/18 Gauge Quick Disconnect Connectors

Your Price $7.99

Items we think you might want
5206P main
Python 5206P

• Clone-Safe And Code-Hopping
• Built-in Turbo Timer
• Defroster Output
• Anti-Grind
• Horn Honk

Your Price $169.99

Browse 1 question
Hide answersShow all answers | Sort by
Hi, can the car horn be used as the audible alarm instead of the included speaker?
Steve R on Oct 4, 2014
· Add Answer · I Have This Question Too (0)

Product Summary


Model Number






Internal SKU


Internal Product ID


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: Clifford Matrix Responder LE 5204X