Exterior Components› Car and Truck Covers

Master Lock

UNIVERSAL COUPLER LOCK

$42.78

SKU: M014 389DAT

In Stock
In Stock
Ships by Aug 7
Free Shipping over $100
Non-Returnable Item

Description

UNIVERSAL COUPLER LOCK

MIA's Description

The Master Lock 389DAT is a trailer coupler lock designed to fit most 1-7/8 in, 2 in, and 2-5/16 in couplers. It guards against trailer tow-away theft with an advanced locking mechanism that resists picking and prying. This lock is built to resist rust and corrosion, making it suitable for various conditions.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMaster Lock
Part NumberM014 389DAT

Videos

(1532) Master Lock Trailer Couplers (379ATPY & 389DAT) (JUNK!)

(1532) Master Lock Trailer Couplers (379ATPY & 389DAT) (JUNK!)
Unboxing & Overview: Master Lock Universal Trailer Coupler Lock

Unboxing & Overview: Master Lock Universal Trailer Coupler Lock
Harbor Freight Universal Trailer Lock

Harbor Freight Universal Trailer Lock
About Master Lock Push to Lock™ Receiver Locks

About Master Lock Push to Lock™ Receiver Locks
About Master Lock Universal Trailer Coupler Lock

About Master Lock Universal Trailer Coupler Lock
Video 18 - Newbie vs. Master Lock 389DAT Trailer Coupler Lock - No tension lever needed :)

Video 18 - Newbie vs. Master Lock 389DAT Trailer Coupler Lock - No tension lever needed :)
etrailer | The Low-Down on the Master Lock Universal Trailer Coupler Lock

etrailer | The Low-Down on the Master Lock Universal Trailer Coupler Lock
GARBAGE - MasterLock Universal Trailer Coupler Lock - 389DAT

GARBAGE - MasterLock Universal Trailer Coupler Lock - 389DAT

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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