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Lippert 12 Inch Trailer Brake Magnet Kit 46-0815 -- Magnet, Wires, Clip and Spring

Lippert 46-0815 12-inch trailer brake magnet kit with black lead wires, retainer clip, and spring for electric drum brake assemblies.
Lippert 014-136447 12" Trailer Brake Magnet Kit
 
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Part Number: 014-136447
Manufacturer: Lippert

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Lippert12" Electric Drum BrakePart 46-0815Lippert 12-Inch Trailer Brake Magnet Kit -- 46-0815

Keep your trailer's electric drum brakes working reliably with this direct-replacement magnet kit from Lippert. Designed for 12-inch brake assemblies, this kit includes every component needed to restore full braking performance without having to source parts separately.

Complete Replacement Kit for 12-Inch Electric Trailer Brakes

Electric trailer drum brakes rely on an electromagnet to engage the brake shoes when the brake controller sends a signal from the tow vehicle. Over time, the magnet wears against the drum surface and must be replaced to maintain safe, consistent stopping power. A worn magnet delivers reduced braking force, longer stopping distances, and can cause uneven brake performance across axles.

Lippert's 46-0815 kit gives you everything needed for a clean, complete magnet replacement in a single package. The magnet arrives pre-wired with black lead wires and the retainer clip and spring are included so you're not hunting down hardware separately on a service day.

Complete Kit

Includes the magnet, black lead wires, retainer clip, and spring -- everything required for a full magnet swap.

12-Inch Fitment

Sized specifically for standard 12-inch electric drum brake assemblies common on RV trailers and fifth wheels.

Lippert OEM Quality

Manufactured to Lippert's specifications for consistent pull strength and reliable contact with the brake drum surface.

Direct Replacement

Drops into existing brake assemblies without modification. Pre-wired leads simplify hookup to the brake wiring harness.

What Is Included in the Kit

  • 1x replacement brake electromagnet (12-inch)
  • Black lead wires (pre-attached to magnet)
  • Retainer clip
  • Spring
Pre-Wired for Easy Installation: The lead wires are already attached to the magnet, reducing bench work during installation. Connect the leads to your trailer's brake wiring harness using the existing connectors or standard butt splices.

When to Replace Your Brake Magnet

Inspect brake magnets at every brake service interval or any time you notice reduced braking response, a brake controller fault, or visible scoring on the magnet face. Common signs of a worn magnet include:

  • Visible groove or flat spot worn into the magnet face
  • Magnet face worn down to or near the wires inside
  • Weak or inconsistent braking despite correct brake controller gain settings
  • Brake assembly that runs hot on one side compared to others
Service Tip: When replacing a magnet, also inspect the brake drum for scoring or heat discoloration. A drum surface that is deeply grooved will accelerate wear on the new magnet. Resurface or replace the drum if the surface is outside tolerance.

Fitment and Compatibility

This kit is designed for 12-inch electric drum brake assemblies. Lippert uses 12-inch brakes extensively across their axle lines fitted to travel trailers, fifth wheels, toy haulers, and horse/livestock trailers. Verify your brake drum diameter before ordering -- this kit is not compatible with 10-inch assemblies.

Maintenance Tip: Replace magnets in axle pairs (both brakes on the same axle) to maintain balanced braking. Mixing a new magnet with a heavily worn one on the same axle will result in uneven brake engagement and can cause trailer sway during hard stops.
Related Parts: If your brake assembly shows additional wear, consider inspecting brake shoes, brake drums, and the actuator arm at the same time. Lippert offers a full line of 12-inch drum brake service components to complete a thorough brake job in one visit.

Part Identification

ManufacturerLippert Components
Vendor Part Number46-0815
Also Referenced As014-136447
SKU96-7529
UPC711217007729

Kit Specifications

Brake Size12 inch
Brake TypeElectric drum brake
Magnet TypeElectromagnet (actuated by brake controller)
Lead Wire ColorBlack
Hardware IncludedRetainer clip and spring

What Is in the Box

Brake MagnetIncluded (12 inch, pre-wired)
Lead WiresIncluded (black, pre-attached)
Retainer ClipIncluded
SpringIncluded
Brake ShoesNot included
Brake DrumNot included

Compatibility Notes

Drum Diameter Required12 inch
NOT Compatible With10-inch drum brake assemblies
Brake Controller RequiredYes -- standard electric brake controller in tow vehicle
Typical ApplicationsRV travel trailers, fifth wheels, toy haulers, horse trailers on Lippert 12" axle systems
Important Information
  • This kit fits 12-inch electric drum brake assemblies only. Do not attempt to install in a 10-inch brake assembly.
  • Electric trailer brakes require a functioning brake controller installed in the tow vehicle. This magnet kit does not include or substitute for a brake controller.
  • Replace magnets in pairs on the same axle to maintain balanced braking performance and avoid trailer sway.
  • Inspect the brake drum surface before installing a new magnet. Grooved or scored drums will cause premature magnet wear.
  • Follow all applicable federal, state, and local regulations regarding trailer brake systems. Trailers above a certain GVWR are legally required to have functioning brakes on all axles.
  • Brake work on tow vehicles and trailers should only be performed by individuals with the proper skills and tools. Improper installation can result in brake failure and loss of vehicle control.

Magnet Kit for Lippert / Dexter Electric Brakes
Fits Lippert / Dexter 12" x 2" Electric Brakes, 4,000 - 7,000 lb axles

Kit Includes:
  • (1) Magnet assembly (black wires)
  • (1) One Retainer Clip
  • (1) One Magnet Spring


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