John Deere Sauer-Danfoss MC300 48-Pin ECU/TCU Connector Repair Kit

John Deere / Sauer Danfoss MC300 48-Pin ECU & TCU Repair Kit

The John Deere / Sauer Danfoss MC300 48-Pin ECU & TCU Repair Kit repairs damaged harness connectors used with MC300 dual path track controllers and related ECU/TCU systems in John Deere dozers.

If your connector is cut, corroded, or failing, this kit gives you a reliable and cost-effective solution. Instead of replacing the entire wiring harness, you can repair only the damaged section and get the machine back in service faster.

Common Search Terms

If you’re searching for the following, this kit fits your needs:

• John Deere dozer ECU connector repair
• Sauer Danfoss MC300 connector kit
• John Deere 450J ECU harness repair
• 48-pin TCU connector replacement
• Dual path controller harness repair

Compatible John Deere Dozer Models

This repair kit works with several John Deere dozers, including:

• John Deere 450J
• John Deere 550J
• John Deere 650J
• John Deere 450H
• John Deere 550H
• John Deere 650H

These machines use 48-pin ECU or TCU connections tied to Sauer Danfoss MC300 controllers. Because of this, the connector plays a key role in machine operation. In addition, it helps maintain consistent communication between modules. As a result, proper connection improves overall system reliability.

Compatible ECU / TCU Systems

This kit supports a range of John Deere and Sauer Danfoss controllers, such as:

• MC300 Dual Path Track Controller
• Sauer Danfoss S2X Micro
• DC2 Microcontroller
• KDC Series Controllers
• Dual Path Controllers

It also matches many common part numbers, including but not limited to:
AT453116, 11163395, AT453122, AT300407, AT308928, AT361627, AT300457, AT340391, AT361623, AT304821, AT322362, AT225288, 1091039, 1091098, 11051268, 11050892, 11019544, 1090647, 1090984, 1091077, KDC2001, KDC2079, MCE112A1090G, MCE112A1082G, AT181566. Additionally, these part numbers cover a wide range of real-world applications. For this reason, the kit fits many common repair scenarios.

What’s Included

• 1 × 18-Position Connector
• 18 × Pre-crimped wires with contacts (Grey)
• 1 × 30-Position Connector
• 30 × Pre-crimped wires with contacts (Blue)

Together, these components complete the full 48-pin connector repair. In other words, you get everything needed for a proper and efficient fix.

Built for Heavy Equipment Applications

A damaged ECU or TCU connector can cause serious issues. For example, you may run into:

• Machine communication faults
• Track control problems
• Engine performance issues
• Equipment downtime

Because of this, replacing only the connector helps reduce costs and avoids a full harness replacement. As a result, you can complete repairs faster and return equipment to service. Furthermore, this approach keeps your repair simple and efficient. At the same time, it reduces unnecessary parts replacement.

Key Features

• Designed for MC300 48-pin ECU/TCU systems
• Fits John Deere J & H Series dozers
• Includes both 18- and 30-position connectors
• Comes with 48 pre-crimped wires
• Reduces the need for full harness replacement
• Ideal for heavy equipment technicians

Important Note

⚠️ This kit repairs the harness connector portion only
❌ This kit does not include ECU, TCU, or ECU header

Comprehensive Return and Warranty Policy for Your Peace of Mind

At Diesel Electronic Supply, our Return and Warranty Policy ensures that you can shop confidently knowing that your satisfaction is our top priority. We accept returns and exchanges for unused, uninstalled, and undamaged products, safeguarding your investment with easy-to-follow procedures.

Whether you're a DIY enthusiast or a professional, our policy is designed to make your shopping experience seamless and worry-free:

• Flexible Returns: Request a return within 7 days for a full refund (minus a 25% restocking fee).
• Store Credit after 7 Days: If you miss the return window, store credit may be issued upon approval.
• No Hidden Costs: Original shipping is non-refundable, and customers cover return shipping.
• Clear Warranty Coverage: Enjoy a 6-month warranty on our products against defects in materials and workmanship.

Need to return an item? Simply email us at support@dieselelectronicsupply.com with your order number and reason for the return. Remember, all returns must be authorized before sending them back!

We believe in transparency and customer satisfaction, which is why our detailed return policy addresses numerous scenarios, ensuring you know exactly what to expect. Shop with us and experience reliable products that come with a promise of quality and support.