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Bypass Essentials 556UW Universal Bypass

Allows remote start in vehicles equipped with a transponder or radio-frequency based immobilizer

Item # 607556UW

Bypass Essentials modules work with your vehicle's anti-theft system to incorporate the convenience, security and...

Find what Fits your car

Bypass Essentials modules work with your vehicle's anti-theft system to incorporate the convenience, security and...

Temporarily out of stock

Ship date unknown

$24.99 -$10.00 Price break

$14.99

About the Bypass Essentials 556UW Universal Bypass

Bypass Essentials modules work with your vehicle's anti-theft system to incorporate the convenience, security and luxury features of your Python alarm system.

Bypass Essentials modules work with your vehicle's anti-theft system to incorporate the convenience, security and luxury features of your Python alarm system.

Universal bypass modules work with any vehicle using an "immobilizer" key system, allowing you to remote start your car without disrupting factory-installed anti-theft features.

Use the 556U universal bypass in vehicles equipped with a transponder or RF-based immobilizer, such as those found in many late-model GM vehicles. The compact module is tunable for European or domestic vehicles and features tamper-resistant circuitry.

Important Note: One of your car's transponder keys will be permanently installed in the 556U module. You can buy an extra key through your dealer and have it programmed to work with your car's immobilizer. Ask your dealer if keys can be programmed individually — some vehicle manufacturers require that all keys be reprogrammed at one time.

Important: If you know how to use a multimeter and have experience working with your vehicle's electrical system, you should be able to install this car security equipment. If you're unfamiliar with installing car security equipment, please speak to an Advisor before attempting this installation. Note: Before purchasing, please call us at 1-888-955-6000 to confirm that this product works with your vehicle.

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Product highlights:

  • universal bypass for Python alarm systems
  • compatible with any factory RF immobilizer or transponder system, including GM Passkey3
  • temporarily overrides the factory immobilizer
  • maintains integrity of factory anti-theft system
  • kit can be tuned for use with European or domestic vehicles
  • supplied harnesses splice into factory wiring
  • requires permanent key mount (into compact module)
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # 556UW

What's in the box:

  • Universal remote start interface module
  • 6-Pin harness
  • 3-Pin harness
  • Instructions sheet

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More details on the Bypass Essentials 556UW Universal Bypass

Russ B.

Product Research

Features

Overview: The 556UW immobilizer interface module is used when installing remote start products (sold separately) in select vehicles equipped with an RF (Radio Frequency) based immobilizer system. This type of system uses a small chip imbedded in the ignition key, called a transponder, to transmit a very low powered RF signal. This signal is picked up through an antenna (or coil) around the ignition switch which is then sent to the immobilizer's transceiver. Once the correct signal is received, the immobilizer will enable the ignition and/or fuel systems. If an attempt is made to start the vehicle and the transceiver does not receive a valid code, the ignition and sometimes the fuel systems are disabled. The immobilizer system will then render the remote start useless. The 556U bypasses the immobilizer system only while the remote start is in use, maintaining the factory system's integrity. When the remote start system is not in use the factory immobilizer remains fully functional.

Installation: The 556UW requires an active key from your vehicle to be installed inside the immobilizer interface module. The 556UW is then mounted underneath your vehicle's steering column. The 556UW immobilizer interface module features the following connections.

  • 6-Pin Harness: Power/Ground/Input Harness
    • Red (+)12 Volt Input: connect this wire to a fused source of constant 12 volt
    • Blue (-) Status Input: connect this wire to the remote start negative (-) status output
    • Pink (+) Ignition Input: connect this wire to the vehicle's true ignition output
    • Black (-) Chassis Ground: connect this wire to the vehicle's chassis ground
    • Violet (+) Key-Sense Input: connect this wire to the vehicle's positive key-sense output wire
    • Green (-) Key-Sense Input: connect this wire to the vehicle's negative key-sense output wire
  • 3-Pin Harness: Antenna harness
    • Black and Black/Red Wires: both of these are antenna ring wires
    • Black and White Wire: closed input wire

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
It's a universal bypass system which means it should fit on any car [ Roystin  Jan 08, 2019 ]

6 questions already asked

Q
I do not have any transponder keys for my car so which immobilizer bypass do i get?
[ Candice  Dec 21, 2019 ]
1 answer
A
That will likely depend on what vehicle you have. You can connect with one of our friendly product advisors to find out everything you will need for a complete installation here: https://www.crutchfield.com/I-rET1c290/S-SUliZgSTXG7/support/ContactUs.aspx
[ Cosmo  Jan 08, 2020 ]  Staff
Q
Says it requires perm key mount, does this key have to be programmed to the existing immobilizer or can it be a new unprogrammed key?
[ Dustin  Mar 18, 2019 ]
5 answers
A
The key has to be a programmed key
[ Mike  Mar 21, 2019 ]
A
The original programmed key goes into box you have keys cut from the key part of the original for less than $2 each
[ Richard T.  Mar 20, 2019 ]
A
Yes, key needs to be a functioning, programmed key that can be "read" by the immobilizer.
[ Wallace  Mar 18, 2019 ]
A
Hello Dustin and not quite remember what and which application i used this product, Ive bought tons of products over the years from cruthfield Please call their tech line or the product advisors and the will be more happy to answer your question. These are good people, knowledge to help with your questions, they don't only sell you stuff but there to help you all the way. Jenny has been my advisor for years, give her a try ext 4033.
[ MICHAEL K  Mar 18, 2019 ]
A
It does have to be a programmed key. You can have it professionally installed and not need this box. My son had it done at Car Toys for about $75
[ Gregory  Mar 18, 2019 ]
Q
Greetings, I have a 2000 Toyota Tundra SR5 4.7L Automatic, no alarm system, with power locks and I want to install a Viper model 4105V alarm with remote start and I want to know if I need a bypass module and which one is the one? Although my truck do not have any chips in the keys.
[ Anibal  Sep 13, 2016 ]
1 answer
A
I would recommend contacting an Advisor directly by phone (1-800-324-9695) or online chat to discuss compatibility with an aftermarket remote start and your '00 Tundra. They will be able to pull up your vehicle and go over the installation options with you in further detail. I hope that helps!
[ Larry  Sep 18, 2016 ]  Staff
Q
Remote start overuse transponder?
[ Buford  Jul 20, 2016 ]
1 answer
A
Yes: "The 556UW immobilizer interface module is used when installing remote start products (sold separately) in select vehicles equipped with an RF (Radio Frequency) based immobilizer system. This type of system uses a small chip imbedded in the ignition key, called a transponder, to transmit a very low powered RF signal. This signal is picked up through an antenna (or coil) around the ignition switch which is then sent to the immobilizer's transceiver. Once the correct signal is received, the immobilizer will enable the ignition and/or fuel systems. If an attempt is made to start the vehicle and the transceiver does not receive a valid code, the ignition and sometimes the fuel systems are disabled. The immobilizer system will then render the remote start useless. The 556U bypasses the immobilizer system only while the remote start is in use, maintaining the factory system's integrity. When the remote start system is not in use the factory immobilizer remains fully functional." You will find this information, and more, by clicking the "Details" tab on the product's main webpage. I hope that helps! My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=5
[ Ryan  Jul 22, 2016 ]  Staff
Q
Will this module work for a 2013 Nissan juke?
[ Brian  Feb 14, 2016 ]
1 answer
A
You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your factory system. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you.
[ Kenny  Feb 15, 2016 ]  Staff
Q
Do I need this to install a remote starter or just makes it easier with no splicing?
[ Gary  Feb 24, 2015 ]
1 answer
A
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.
[ Krissy  Feb 25, 2015 ]  Staff
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