Avital 5103LD

Car Alarm, Remote Start and Keyless Entry Security System with 2 Remote Transmitters

Shop all Avital
Product videos

• Active and passive arming
• Silent, valet and panic mode
• Valet take-over
• Short-run/turbo timer
• Starter anti-grind circuitry
• Dual zone shock sensor

Learn more about the 5103l

We apologize

This item has been discontinued

Product Highlights

• Active and passive arming
• Silent, valet and panic mode
• Valet take-over
• Short-run/turbo timer
• Starter anti-grind circuitry
• Dual zone shock sensor


Make Sure You Have Everything You Need!

Nearly all cars require an immobilizer bypass to add a remote start system. Click here to add one to your order!

Remote Start Car Alarm

Remote Start

Allows a vehicles engine to activate 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.

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.



5103L Features

  • Remote Start Security System with Keyless Entry
  • Not sure which model is right for you? Click Here To compare different Avital models
  • Includes two 4-button remotes
  • Active and passive arming
  • Multi-level security arming allows you to select which of the inputs or sensors will be active and which will be bypassed
  • Silent mode to temporarily turn off the arm or disarm chips
  • Panic mode will sound alarm and flash your parking lights
  • Valet mode will not arm the security system with the remote transmitter
  • Remote start feature allows you to remotely start and run your vehicle for a period of time
  • Valet take-over allows the vehicle to remain running after the key has been removed from the ignition
  • Short-run/turbo keeps the engine running for 1, 3, 5, or 10 minutes
  • Starter anti-grind circuitry
  • Dual zone shock sensor
  • 1-year warranty

Replacement / Additional Remote Options:

Avital Model Comparison Chart

Model Security Remote Start Keyless Entry 2-Way Main Remote Type Range Secondary Remote Channels Trunk Pop
5303L LCD Screen 1500 Feet 4-Button, 1-Way 4
5103L 4-Button, 1-Way 1500 Feet 4-Button, 1-Way 4
4113L/4113LXL Unlock ONLY 1-Button 1500 Feet 1-Button N/A
4111L Unlock ONLY 1-Button 1500 Feet N/A N/A
4103LX/4103LXL 4-Button, 1-Way 1500 Feet 4-Button, 1-Way 2
4003L N/A N/A N/A N/A
Also Found As: Avital 5103L

Specifications & Details

General Features
Security System Type
Security with Remote Start
Car Alarm
Remote Start
Keyless Entry
2-way Paging
Number of Remotes
Number of Buttons on Primary Remote
Main Transmitter Type
Sidekick Remote Transmitter Type
LED/Display Color
PC Programmable
Smartphone Compatibility
Professional Installation Recommended
Replacement Remote Transmitter
Optional (Accessory required and sold separately
Convenient Features
Panic Mode
Trunk Release
Valet Mode
Alarm Features
Shock Sensor
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


Model Number:




Internal SKU:


Internal Product ID:


Product and How-to Videos

Customer Ratings & Reviews

5 star
4 star
3 star
2 star
1 star


Customer Reviews

Sort by:


Works really good

This alarm system better than I thought it would, quality parts, and the remotes are very durable. The remote start is really convenient, all my friends and family want me to install one on their vehicles.

By Crmckjr on October 31, 2014


found this helpful.

Great value for the DIY folks

Does what it says. Installation is more complex than just an alarm but if you download your car's wiring data from the internet you can do it as long as you can read. Soldering skills help too.

By xjdad on February 4, 2013


found this helpful.

Great product

Avital products have always performed as expected. Reliable and cost effective.

By Scott on March 3, 2011


found this helpful.

great price

Awesome remote start/ security system at great price works very well.

By beaver on January 9, 2015


found this helpful.

Avital 5103

All features work as mentioned, perfect alarm remote start system as long as you have a liscensed installer put it in because of the complex installation.

By Bougar on May 24, 2013


found this helpful.

avital alarm

The alarm is great and I don't have problems with any of the alarms that i had bought and the service is good and faster and im very happy thank you so much.

By Nery Lopez on July 12, 2012


found this helpful.

Great Product

Great product ! just like my old 350 viper system but with better remotes and better distance first time installer it took me 4 hours, very straight forward, remote started right up first try. I found this product about 20 $ cheaper on other web sites but just didnt trust there service.

Thanks Sonic will buy from you Again: Packaged & Delivery Excellent !!!

By Jorge on April 14, 2010


found this helpful.


Bought two of these, one for me and one for my wife's car. We love them, and don't know how we lived without them for so long. Only minor thing I don't like is that it takes a long time for the trunk feature to open. Other than that, these are a bargain and work flawlessly.

By Fairlaner7 on May 6, 2013


found this helpful.

Great Value

The Avital remote start/alarm system is great! I love being able to start my truck from my office and by the time I get to the truck it's cooled down and I know it's safe!!!

By Eric on August 5, 2012


found this helpful.

More than you pay for

This product works fine and has a ridiculous amount of options, all for a low price. I have used it flawlessly for 6 months now with no issues. I would definitely recommend it to anyone for a low cost security solution w/ remote start.

By John on June 27, 2010


found this helpful.


Similar Products

Best selling similar products

Viper 5305V

• Buttons: Arm, Disarm, Auxiliary, and Panic
• Stinger® DoubleGuard® Shock Sensor: chirps when the vehicle's bumped and sets off the alarm with further violations
• Neo Revenger® 6-Tone Siren: 120 dB weatherproof siren
• Failsafe® Starter Kill: Prevents hot-wiring with anti-carjacking protection
• Horn honk, dome light supervision, and parking light flash


Viper 3105V

• FailSafe Starter Kill
• Stinger Double-Guard Shock Sensor Detects Tempering
• Panic Mode - Call for Attention by Triggering Alarm



Viper Responder 350 3305V

• Includes a Main and Sidekick Remote
• Clone-Safe Code-Hopping Technology
• 1,500 Feet of Transmitter Rnge
• DoubleGuard Shock Sensor
• Revenger Six-Tone Siren



Crimestopper SP-302

• 2-Way FM Paging Alarm/keyless Entry System
• Enhanced White and Red LED Backlighting
• Electronic Dual-Stage Shock Protection
• DPPI Technology: 2-Way Data Port Allows for Direct Plug-in Data Modules



Viper 3100V

•11-Way Keyless Entry Car Alarm
• 3-button transmitter


Related Searches

5103 small

Item added to your cart.

Price: $79.99

Essential add-ons
Butt Connectors

100 Pack of 22/18 Gauge Red Butt Connectors



Add to cart
Wire Crimper

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



Add to cart
Save up to 10 different vehicles in your garage

Add vehicle
Identify your vehicle and submodel details
  • Owner’s manual
  • Vehicle’s insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver’s side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon