Viper Responder One (Model 4205V)

Remote start/keyless entry system with 2-way remotes

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  • Viper Responder One (Model 4205V)


  • Viper Responder One (Model 4205V)

  • Viper Responder One (Model 4205V)


Our take on the Viper Responder One (Model 4205V)

by Buck Pomerantz

We offer vehicle-specific interfaces and harnesses that you may need to complete your remote start installation. Please identify your vehicle as we review every order to make sure you've got everything you need.

Start your engine remotely, then get confirmation that it's running

You can start your car from up to 2000 feet away — that's well over a quarter mile — with Viper's Model 4205V remote start system. Just push the button on the keychain remote, and your car will be warmed or cooled by the time you get to it. Each 2-way remote features an LED that lights up to confirm that your engine has started. The Model 4205V system is also compatible with any Viper SmartStart module, which allows you to start your car via your smartphone with no limit to the range.

Read more

Push to start and keyless entry vehicles

The Model 4205V system works well with push-to-start (PTS) vehicles and those with keyless entry systems that use the head of the key as a transmitter. The factory keyless entry systems in many vehicles won't work after the car's been remotely started, so the 4205V includes an unlock feature to bypass that situation. You'll hardly notice the 4205V's compact remote on your keychain, but you'll really appreciate the convenience that this easy-to-use one-button remote will bring to your lifestyle.

Important Note:
We offer a databus interface module that can save you lots of time when you install a Viper remote start system in most vehicles. Chat or call us at 1-888-955-6000 to see if the interface will work with your vehicle.


  • remote start system
  • remote start function is for fuel injected, diesel, and hybrid vehicles with automatic transmissions only
  • two 1-button 2-way transmitters — up to 2000-foot range
  • can unlock car after remote start (no lock function)
  • Car Finder flashes lights five times slowly (only functions when not remote started)
  • SuperCode® encryption protocol technology for added security
  • optional Viper 7211V remote available as replacement
  • compatible with XpressKit DBALL2 vehicle interface module and all Viper SmartStart smartphone modules
  • D2D port for direct interface connection
  • warranty: limited lifetime
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Lines of Defense
Alarm No Alarm
Pager Warning No
Scan-resistant Remote Codes Yes
Battery Backup No
Trigger Methods
Glass Break Sensor No
Accessory Pins No
Current Sensing No
Arming Method N/A
Included Remotes 2
Number of Remote Buttons 1
Number of Remote Functions 4
Two-way Remote 2 remotes
Smartphone Integration Optional 607VSM200
Factory Security Integration No
Number of Cars 2
Hood/Trunk Release No
Remote Door Locks Yes
Remote Start Yes
Manual Transmission Compatible No
Valet Switch Yes
Manual Override Yes
Delayed Operations
Entrance No
Exit/Last Door No
Reset/Trigger No
Rearm/Disarm No
Number of Zones 0
Parts Warranty Lifetime
Labor Warranty Lifetime
Product Research
What's in the box?

Download owner's manual

  • Control module (with 3-pin jumper taped to top)
  • Two 7211V 1-button transmitters (each with two CR2016 batteries installed)
  • Self-adhesive antenna/receiver
  • Main harness (9-pin) with 36" leads and in-line 10A ATO fuse
  • Door lock harness (3-pin) with two 59" leads
  • Heavy-gauge remote start harness (6-pin) with 24" leads and 2 in-line 30A ATO fuses
  • Satellite harness (4-pin) with 6" leads
  • H3 Remote start harness (5-pin) with 36" + 98" leads
  • 10' Antenna/receiver flat black cable (with 4-pin connectors on each end)
  • Shut-down toggle switch with attached 18" leads (no connector)
  • Valet switch with 6' leads (2-pin connector)
  • Pin switch (with 0.25" male quick slide)
  • 0.25" Female quick slide
  • Warning Sticker
  • Owner's Guide
  • Quick Reference Install Guide
  • 2 Viper stickers
  • SmartStart promo card
  • SmartStart reminder

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

General Features
Remote Starter Features
Keyless Entry Features

General Features

Overview: The Viper Responder One 2-way Remote Start and Keyless Entry system (Model 4205V) can start your car and run it by remote control from a distance of up to 2000 feet for a preset amount of time. It will also function as a keyless entry system, but only after the vehicle is remotely started via the transmitter. The Model 4205V does not provide car security.

Note: The remote start function is for fuel injected, diesel, or hybrid vehicles only.

One-button Remotes: The Model 4205V includes two 1-button transmitters (7211V) with 2-way operation. The single button controls all of the functions of the system, including starting the vehicle, and unlocking the doors. The LED on the remote gives you confirmation that your car has started. The 7211V remotes are powered by two CR2016 batteries (installed).

Responder One: This Responder One system offers one-button remote start with a range of up to 2000 feet. The 2-way system provides confirmation back to the remote's LED, so you will know the status of your vehicle.

SuperCode: The system includes SuperCode technology for a more secure operation. The system's signal encryption protocol is based on software, which is superior to the hardware-based Clone Safe Code-Hopping found in other models. SuperCode technology also lets you control the operations of two cars by a single, one-button remote.

D2D Port: The Model 4205V's control module has a D2D port that will allow you to plug in an XpressKit vehicle interface. XpressKit interfaces are vehicle-specific, and can greatly reduce installation time by interfacing with your vehicle's factory wiring. Check the Crutchfield Vehicle Selector to see if an XpressKit interface is available for your vehicle.

ESP Port: The 4205V includes a dedicated 3-pin ESP port for connecting an optional Viper SmartStart module. This is an improvement over last year's model (4203V) which had one port that allowed either D2D or ESP functionality. The separate ports allow you to plug in an XpressKit vehicle interface (see D2D port above) and a SmartStart module at the same time.

SmartStart Compatible: The optional Viper SmartStart module lets you start, control, or locate your car from virtually anywhere with your smartphone. Available SmartStart modules include the VSM200, VSM250 (with GPS), and VSM50BT (with Bluetooth).

Car Finder: If you're having difficulty finding your vehicle in a crowded parking lot, the car finder function will cause the lights to flash 5 times slowly, allowing you to locate your vehicle.

Panic Mode: If you are threatened in or near your vehicle, you can attract attention by triggering the system with your remote. Panic mode requires the horn honk circuit to be connected.

Rapid Resume Logic: This Viper remote start system stores its current settings in non-volatile memory. If power is lost, the system will recall the stored settings from memory when power is restored.

Remote Starter Features

Remote Starting: Pressing the transmitter button on the remote for a second will remotely start the vehicle and run it for 12 minutes. You can extend the run time to 24 or 60 minutes. If you wish to pre-heat or pre-cool the vehicle, you must preset the climate controls prior to starting the vehicle. When you are ready to drive the remotely-started vehicle, insert the ignition key, turn it to the On position (not Start), and press the brake pedal.

Crank Time: If the unit is programmed for no engine checking or voltage sense, the crank time must be set to the appropriate duration. The default setting is 0.6 seconds. It can be lengthened to 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0, or 4.0 seconds.

Diesel "Wait To Start" Timer: If you have a diesel vehicle, you can set the starter to delay by a few seconds before engaging. The "wait-to-start" duration can be set to 15, 30, or 45 seconds. Gasoline engines will start approximately 4 seconds after the system acknowledges the start command by flashing the parking lights.

Pit Stop: This feature allows the vehicle to remain running after the key has been removed from the ignition. This is useful for those occasions when you wish to exit and lock the vehicle for short periods of time while leaving the motor running and the climate controls on.

Automatic Shut-down/Starter Lockout: After the vehicle is remote-started, the remote starter will shut down when the brake pedal is pressed, the hood is opened, if the run time expires, or when the remote start command is sent again from a remote control. In addition, if the hood is opened or if the brake pedal is pressed, you cannot start the vehicle using the remote starter.

Anti-grind Circuitry: Whenever the vehicle is started using the remote, advanced anti-grind circuitry prevents the starter from being engaged using the key. (In other words, it won't let you try to start the car with the key if the remote starter has already been engaged.) This prevents damage to the starter motor. The optional Failsafe Starter Kill relay must be installed in order for the anti-grind circuitry to work.

Shutdown Switch: You can temporarily disable the remote start unit to prevent the vehicle from being remote started accidentally by switching the supplied neutral safety toggle switch to the Off position.

Keyless Entry Features

Unlocking The Vehicle: The Model 4205V will remotely unlock the vehicle's doors only after the engine has been remotely started via the transmitter. The system can be programmed to lock and unlock the doors as the ignition it turned on or off. If connected and programmed, the power doors will lock three seconds after the ignition is turned on, and unlock when the ignition is turned off. The lock and unlock functions are separately programmed.

Note: When interfacing with any other type of factory door lock system besides negative switching locks, or when adding aftermarket actuators, two relays (such as two 120E5000s) or a door lock module (607451M) will be required. If your vehicle requires the use of a Data Integration module that controls your factory door locks, no extra parts besides the Data Integration module will be required.

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1 question already asked

How does the buttons work to start and unlock? [ Carla  Feb 15, 2014 ]
1 answer
  • We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Jeff Staff  Feb 17, 2014 ]

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For a more in-depth review and enhanced detailed information on the Viper Responder One (Model 4205V), please visit the Crutchfield website product page (/ISEO-rccbcspd/p_6074205V/Viper-Responder-One-Model-4205V.html ).

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