Clifford RSX 3.5

2-way LCD & Remote Start Alarm


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This item has been discontinued

But you may be interested in the newest model that's available.

5301x thumbnail

Clifford Matrix 50.5X (p/n 5301X)

OUR PRICE: $199.99

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  • 2-Way Security & Remote Start System
  • Remote Start Convenience
  • New Style 2-way Transceiver With Responder Technology
  • Remote Engine Start
  • Super-Bright LED Status Indicator
  • High-Output Mini Neo System
  • Virtually Instant Confirmation of Remote Start
  • Dedicated one-button start
  • Turbo-timer Built In
  • Defroster Activation output
  • Safety Shut Down
  • Timer Mode
  • Complete Engine Monitoring
  • New miniature High Capacity Relay Satellite
  • Anti-Grind
  • Tach / Voltage Checking
  • Remote Operates Power Trunk Release
  • Clifford GPS Tracking System Compatible
  • Directed Video Compatible
  • Fault-Proof Starter Interrupt
  • Forced Passive Arming
  • Active/Passive Arming
  • Progressive Door Trigger
  • Dual-Zone Shock Sensor
  • False Alarm Control Technology
  • Clone-Safe Code Hopping (2^66 Codes)
  • Remote Controlled Chirp Muting
  • Patented Remote Control Code Learning
  • Siren Silencing
  • Soft Chirp
  • Secondary Warning Zone
  • Remote Controlled Valet Mode
  • Bitwriter Compatible
  • Built-in Parking Light Flasher
  • Full-time Remote Panic with Automatic Door Locking and Unlocking
  • 1-year warranty

Product History:

Clifford MATRIX-50.7X thumbnail
(newest, current model)
Clifford MATRIX-50.5X thumbnail
(previous model, replaced by Clifford Matrix 50.7X (p/n 5702X))
Clifford RSX3.5 thumbnail
(previous model, replaced by Clifford Matrix 50.5X (p/n 5301X))

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.

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.
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
System Type
This refers to the type of remote start system, whether it is an add-on or a complete kit.
Replacement Remote Transmitter
Car alarm replacement remotes are used when you damage or lose your original remote that came with your alarm. Programming of the replacement remote is required and must be done on site where the alarm is installed in the vehicle. Some remotes can be used as an additional 2nd or 3rd remote on a car alarm system.

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

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”.

Dual Zone Shock Sensor

Two-Way Paging Features

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
Not warranted
Labor Warranty Duration
Not warranted
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating


Turks and Caicos Islands

Worth the price

April 7, 2009

for the price and the features it is more than worth it plus it is user friendly.

3 of 4 found this helpful

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Kansas City, MO


October 3, 2006

Pros: this is a decent alarm, I’m using it in a basic configuration because I don’t have no power locks / windows etc. It also has a pretty good (unobstructed line of site) range of about 2 to 2.5block radius.
The remote seems to work great to. The Remote start works great, it usually starts my car in the 1st attempt. It doesn’t hold the starter on too long either, just enough to get it started (with out causing any damage)

Cons: this is not the cheapest unit, it only came with one transmitter, reasonable priced replacement transmitters are hard to find (when they 1st came out). DEI wants so much for a replacement 2 way transmitter. That it’s the same price as buying the alarm all over again from this site. The remote doesn’t have a quick one touch button for back light or vibrate mode. And the 2 way transmitter that sounds when you’re car is going off isn’t loud. It’s just beeps, when another brand I was using had a loud baby siren sound

2 of 3 found this helpful

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Westminster, CA

Clifford Rsx3.5 Alarm System

February 1, 2006

This system i just order because my friend have one. It very easy to use and installation is a breeze if you bring it to a shop. The range of the response lcd is awesome. That the reason why i baught one. This is one of the best alarm in the market and don't take my word for it, try it yourself.

2 of 3 found this helpful

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Accessory Tools and Products

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100 Pack of 22/18 Gauge Quick Disconnect Connectors

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Browse 1 question
Hide answersShow all answers | Sort by
I have a Clifford RSX 3.2 that went bad, I want to replace the system with another system that wont require me to rewire the system?
quinn p on Jul 2, 2015
· Add Answer · I Have This Question Too (0)

Product Summary


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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: Clifford RSX 3.5

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Clifford RSX 3.5

2-way LCD & Remote Start Alarm


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Omega AU-7

Single Pole, Double Throw 30/40 Amp Relay. A must have for (Starter Kill, Door Locks, Remote Start and more)


Encore ACT-4

Universal Vehicle Kit - Add power door locks to any four door vehicle without power locks



Temp Resistant TESA Cloth Fabric Harnessing Tape (Interior, Exterior, & Under-Hood)



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