3C3Z-6A051-AA Diesel Engine Block Heater 120V 1000W Assembly with Wiring Harness – Compatible with Ford E-150 E-250 E-350 E-450 F-250 F-350 F-450 F-550 Excursion 2003–2010

In colder climates, diesel engines are especially vulnerable to cold starts that can cause mechanical stress and fuel inefficiency. The Boxonly Engine Heater Assembly ensures your F-series Super Duty or E-series van starts smoothly every morning, protecting critical components from cold start damage. Built for mechanics, fleet operators, and DIY diesel users, this 1000W engine block heater pre-warms coolant and oil before ignition, drastically improving starting efficiency and reducing idle time. It’s the ideal upgrade or replacement for aging OEM units on Ford’s popular diesel lines. Unlike generic options, Boxonly offers improved thermal contact, durable sealing, and a secure wiring harness. The heating unit with wiring harness mounts securely even in tight 6.4L compartments, minimizing the risk of connection loss or overheating—issues commonly found in lower-cost alternatives. Product Features: Voltage: 120V / Power: 1000W Material: Metal + Rubber FCC ID: 3C3Z-6A051-AA (also fits 3C3Z6A051AA) Size: 133mm x 36.5mm (5.24" x 1.44") Package Dimensions: 10.4 x 3.2 x 1.9 inches Weight: 16 oz Type: Diesel Engine Heater Block Kit with Wiring Harness Supported Vehicles by Year & Model: Ford E-150 (2005–2010) Ford E-250 (2005–2010) Ford E-350 / E-350 Super Duty (2004–2010) Ford E-450 Super Duty (2005–2010) Ford Excursion (2003–2005) Ford F-250 Super Duty (2003–2010) Ford F-350 Super Duty (2003–2010) Ford F-450 Super Duty (2003–2010) Ford F-550 Super Duty (2003–2010) OEM & Interchange Numbers: 3C3Z-6A051-AA 3C3Z6A051AA Whether you're managing a winter-ready fleet or prepping your diesel truck for the cold, trust Boxonly for long-lasting heating performance and peace of mind.

• 🔧 Comprehensive Compatibility 🔧 – Designed for Ford E-150 (2005–2010), E-250 (2005–2010), E-350/E-350 Super Duty (2004–2010), E-450 Super Duty (2005–2010), F-250 to F-550 Super Duty (2003–2010), and Excursion (2003–2005) with 6.0L and 6.4L diesel engines.
• 🔌 OEM Replacement Standard 🔌 – Replaces OE Number 3C3Z-6A051-AA (also compatible with 3C3Z6A051AA) and functions as a direct-fit engine heater and fluid warmer for diesel applications, especially in cold regions.
• 🔥 Cold Start Engine Protection 🔥 – This engine block heater delivers 1000 Watts at 120V to efficiently preheat coolant and oil, helping prevent hard starts and reducing engine wear during winter operations.
• 🛠️ Durable Materials, Easy Mount 🛠️ – Built from reinforced metal and rubber, designed for tool-accessible installation even in tighter engine bays like the F-350 and F-450. No splicing or rewiring needed.
• ⚙️ Secure Wiring Harness Included ⚙️ – Comes complete with sealed heating unit with wiring harness and nut for secure fitment. Matches performance of block heater for F-350 and related Super Duty models. FCC ID: 3C3Z-6A051-AA.