OEM Dexter 12-1/4" × 3-3/8" Electric Brake Assembly — Left Hand (Driver Side)

This is the genuine Dexter K23-434-00 complete electric brake assembly for the left hand (driver side) of 8,000 lb trailer axles. Sold as a complete, pre-assembled unit — shoes, springs, adjuster mechanism, and magnet all mounted to the backing plate and ready to bolt on.

Features Dexter's Forward Self-Adjusting (FSA) mechanism, which automatically adjusts brake shoe clearance during both forward and reverse stops. No manual adjustment needed between service intervals.

📐 Specifications

🔍 What's Included

Complete pre-assembled brake unit — everything needed for installation:

• Brake backing plate (4-bolt)
• Brake shoes (primary and secondary)
• Electric magnet (wired)
• Return springs and hold-down hardware
• FSA self-adjuster mechanism
• Adjuster cable and anchor pin

⚠️ Mounting hardware (bolts) not included. Hub/drum sold separately.

🛠 Compatible Axles & Applications

Fits any 8,000 lb (8K) axle with a 12-1/4" × 3-3/8" brake flange and 4-bolt mounting pattern, including:

• Dexter 8K electric brake axles
• Lippert 8K axles (replaces Lippert 298277)
• Besser Pro 8K axles

Commonly installed on: equipment trailers, flatbed trailers, car haulers, utility trailers, gooseneck trailers, livestock trailers, horse trailers, and snowmobile trailers rated at 8K GVW or higher.

💪 Key Features

✔ Forward Self-Adjusting (FSA)

Adjusts automatically on forward and reverse stops as lining wear increases shoe-to-drum gap. Extends service intervals and maintains consistent brake performance throughout pad life.

✔ Complete Pre-Assembled Unit

Drop-in replacement — no assembly required. All components mounted, springs tensioned, and magnet wired at the factory.

✔ Genuine Dexter OEM

Factory-specification part. Not an aftermarket substitute — the same assembly Dexter installs on new axles and recommends for replacement.

✔ 4-Bolt Direct Bolt-On

Mounts directly to the standard 4-bolt brake flange on 8K Dexter and compatible axles. No drilling, no fabrication.

🚛 In Stock & Ready to Ship

📞 Call/Text: 517-225-1991 🌐 AAATrailer.com

🔄 Cross Reference / Alternate Part Numbers

K23-434-00 | 23-434 | 23434 | 023-434-00 | K2343400 | 220-23434 | 220-K2343400 | 02343400 | Lippert 298277 | 12.25 x 3.375 8K LH electric brake

What sets us apart is our dedicated team of knowledgeable professionals who are always ready to assist. Great customer service isn't just a promise—it's the foundation of our success. We invite you to visit our showroom or reach out for personalized advice. Whether you're purchasing online or stopping by, we're here to make your trailer journey seamless. Visit Us Today

• Address: 4675 East Grand River Ave, Howell, MI 48843
• Phone: (517) 225-1991 (Call or text)
• Hours: Monday to Friday: 10:00 AM - 5:30 PM | Saturday: By appointment

Thank you for considering AAA Trailer. We're excited to help you hit the road with confidence! If you have any questions, don't hesitate to contact us.

To deliver your favorite products, we have partnered with the UPS & FEDEX . We are ready to entrust them with your orders and are always on your side if something goes wrong.

 We will be happy to assist you with eligible returns, the return instructions, and the shipping address. If you need a return or exchange, send us an email so we can discuss a replacement.