12K - 15K Trailer Axle Electric Brake Assembly - 12000 lb 15000 lb Capacity - 12.25"x5" - Left Hand (Driver Side)

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12K - 15K Trailer Axle Electric Brake Assembly - 12000 lb 15000 lb Capacity - 12.25"x5" - Left Hand (Driver Side)

12K - 15K Trailer Axle Electric Brake Assembly - 12000 lb 15000 lb Capacity - 12.25"x5" - Left Hand (Driver Side)

SKU : 12BRKAS-PAIR-BULK

Online price only

Regular price $2,826.99

Online price only

SAVE 0% (833) 910-3416
4.5
Rated 4.5 out of 5 stars
149 Reviews
Shipping: Calculated at Checkout
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  • Reviews

12K–16K Electric Trailer Brake Assembly — Left Hand (Driver Side) | 12.25" × 5" | 7-Bolt Flange

Upgrade your trailer braking system with this heavy-duty 12K–16K electric brake assembly. Built for demanding hauling applications, this driver-side unit delivers strong, reliable stopping power for large equipment, cargo, and commercial trailers. Designed for easy replacement, it helps restore safe and consistent braking performance quickly.

Note: Not compatible with Rockwell axles.

Brake Assembly Specifications

  • Brake size: 12.25" × 5"
  • Position: Left hand (driver side)
  • Axle capacity: 12,000–16,000 lbs
  • Mounting flange: 7-bolt pattern
  • Compatibility: Fits most Dexter, TK, Lippert, Texas Pride, and similar axles
  • Warranty: 1-year manufacturer warranty

What’s Included

  • (1) 12K–16K electric brake assembly — driver side

Key Benefits

  • Heavy-duty braking performance for large trailer loads
  • Complete assembly makes replacement fast and simple
  • Rear adjustment ports allow easy brake fine-tuning
  • Strong, reliable stopping power under heavy use
  • Designed for compatibility across multiple major axle brands

Installation Notes

Installation requires seven mounting bolts and two wire connections. Mounting hardware is sold separately.

This brake is not compatible with Rockwell axles.

Brake Burnishing Procedure

  • New brakes must be burnished before regular use.
  • Perform 20–30 controlled stops from approximately 40 mph down to 20 mph.
  • Allow brakes to cool between each stop to ensure proper bedding and performance.

Ideal For

  • Equipment trailers
  • Heavy-duty utility trailers
  • Flatbeds and cargo trailers
  • Commercial and fleet trailers

Why Buy from The Trailer Parts Outlet?

  • Fast shipping
  • Bulk and wholesale options available
  • High-quality heavy-duty brake components
  • Expert support to help you choose the right parts

Order your 12K–16K electric trailer brake assembly today and restore dependable stopping power to your trailer.

4.5
Rated 4.5 out of 5 stars
Based on 149 reviews
Total 5 star reviews: 118 Total 4 star reviews: 15 Total 3 star reviews: 5 Total 2 star reviews: 1 Total 1 star reviews: 10
Customers Talked About
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149 reviews
  • MB
    Mark B.
    Verified Buyer
    Yesterday
    Rated 5 out of 5 stars
    Trailer brake assembly

    Brakes were what was expected. Fairly quick shipping. Although the packaging is a bit weak. Could use a bit more material to secure brake assembly in the box. Otherwise very good experience.

    The Trailer Parts Outlet
    4 minutes ago

    Thank you for your business and your feedback, we will definitely take that into consideration on our packaging!

  • DP
    Dale P.
    Verified Buyer
    1 week ago
    Rated 5 out of 5 stars
    brake assembly

    I was impressed with the product and the ease of replacing the 20 year old brakes on my trailer, the low cost and product quality

    The Trailer Parts Outlet
    1 week ago

    Great to hear you were impressed with the 3.5k Trailer Axle Electric Brake Assembly and that it made replacing your 20 year old brakes so easy, Dale! We're thrilled the product quality and low cost exceeded your expectations. It sounds like it was the perfect solution for updating your trailer. We really appreciate your business and thank you for your 5 star review!

    Loretta Peacock
    (936) 935-2186
    The Trailer Parts Outlet

  • CD
    Christopher D. B.
    Verified Buyer
    2 weeks ago
    Rated 4 out of 5 stars
    Electric brakes

    Installation was made easy having the assembly pre assembled

  • JM
    Jess M. B.
    Verified Buyer
    2 weeks ago
    Rated 5 out of 5 stars
    Hubs

    Great service, 1 part was lost in transit and was replaced without question 😊

  • GK
    Gary K.
    Verified Buyer
    3 weeks ago
    Rated 5 out of 5 stars
    Look good

    I bought 2 sets to install on RV, as last year when packing bearings brakes looked worn. So removed tire and drum today and noticed that brakes are still good as having something to compare shoes with . I did notice a difference in new assembly compared with OEM. OEM does not have auto brake adjust when you back up and hit the brakes . The new brake assembly does.

    The Trailer Parts Outlet
    1 week ago

    Hi Gary,

    Thank you for the 5-star review and for taking the time to share your feedback on the 3.5k Trailer Axle Electric Brake Assembly. We're glad to hear that they look good and that you're pleased with the quality. It sounds like you made a smart decision getting them ahead of time while doing your bearing maintenance - it's always good to have a comparison to work with. We appreciate you mentioning the difference with the auto brake adjust feature compared to your OEM setup. That's helpful information for other customers who might be wondering about the functionality differences when upgrading their brake assemblies.

    Loretta Peacock
    936-220-4018 The Trailer Parts Outlet