1.888.955.6000
crutchfield.com
Crutchfield

XpressKit 451M

Door lock relay module for Python® and Viper security systems

Save up to $100
on security accessories
with a select security system with a select security system
Zoom
  • XpressKit 451M

    Front

Crutchfield OMC logo
We don't check this item for fit or compatibility.
 

Our take on the XpressKit 451M

by Gabrielle Thorndyke
Viper

Get more out of your Python security system with XpressKit accessories. These handy add-ons let you incorporate luxury, security and convenience features into your vehicle.

The XpressKit 451M door lock relay assembly integrates your vehicle's power doorlocks into a Python security system. The pre-wired module features built-in 40-amp relays, and the package includes resistors you'll need to accommodate newer vehicles. Warranty: 1 year

See more info on this item

Note: 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 call 1-888-955-6000 to discuss your purchase with one of our Advisors.

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

Product Research
What's in the box?

Download owner's manual

  • Micro door lock relay module
  • 27 Resistor multi-pack
  • Installation instructions
  • "Directed Resistor Interface Pack" sheet
  • Vehicle Applications card

Scratch & Dent items may be missing non-essential accessories. In some cases the manufacturer's accessories have been replaced with generic equivalents.

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.

Features

Overview: The door lock relay module (451M) will interface with most electric power door lock systems drawing 30 amps or less; both relay-controlled and direct-wired reversing-polarity types. It can also drive aftermarket door lock actuators, which must be added in the driver's door of select vehicles. In addition, it can directly operate post-1985 Mercedes-Benz and Audi vacuum-driven systems if driven by a system with selectable-duration pulses (three-second minimum required). The 451M is compatible with the following types of common door lock circuits.

  • Type A: Three-wire (+) 12V pulse controlling factory lock relays
  • Type B: Three-wire (-) ground pulse controlling factory lock relays
  • Type C: Directly-wired (no factory relays) reversing-polarity switches
  • Type D: Aftermarket-actuator-driven systems. These include slave systems without an actuator in the driver's door, but with factory actuators in all the other doors; since these can be controlled with the installation of an aftermarket actuator.
  • Type E: Electrically-activated vacuum systems (Mercedes-Benz and Audi 1985 and newer). This requires special programming of the system.

Resistor Pack: The 451M comes supplied with a 27 resistor multi-pack to interface with various vehicle door locking systems.

 
Review this product
Great Gear Giveaway rewards card

Submit a review and then enter to win a $500 rewards card

XpressKit 451M Reviews

Average Customer Review:

2 people say:

Review this product:

Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information.

Your email won't be visible. Please use the email address that is associated with your order.
(e.g., JohnD) Your review will be signed using the display name and location
(e.g., Charlottesville, VA)

Click on a star to rate the overall product on a scale of 1-5
1500 characters left
Attach a YouTube Review
Crutchfield Video Review Guidelines
  • Only submit videos that you made or are authorized to use.
  • Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else.
  • Please see our Review Guidelines for more information.
500 characters left
500 characters left
Filter by rating:
4 out of 5

XpressKit 451M

Written By JohnJ, Hagerstown,Md. on Friday, June 27, 2014
Crutchfield Customer Review (What's this?)
 
Product did not have 100 ohm resistor.Had to provide myself.Product did not include specific wiring diagram for my vehicle {2005 Durango} and a 350i Crime Guard.This caused lost of time and numerous calls to Crutchfield techs before someone finally got it right.
Pros:
it works
Cons:
missing parts and wiring instuctions for completion
Was this review helpful?    Yes | No
 
5 out of 5

Compact Doorlock Relay

Written By TomT, Lovingston, Va on Sunday, November 11, 2012
Crutchfield Customer Review (What's this?)
 
Installed in a 1998 Toyota Carolla in conjunction with the Crime Guard 350i5 car alarm. This allowed the Car alarm remote to operate the power door locks. My car required the 5-wire setup which involved cutting the factory door lock wires coming from the fuse box so that this was installed in series between the door lock actuator and the door lock switch.
Pros:
Wires are more than long enough. Interfaces directly with alarm unit.
Cons:
I'm a Electronics Tech so the wire schematics were a little too simplified for my taste.
Was this review helpful?    Yes | No
 

For a more in-depth review and enhanced detailed information on the XpressKit 451M, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_607451M/XpressKit-451M.html ).