The John Deere RE506664 is a genuine OEM Engine Controller, specified as a Level 4 12V unit. This critical electronic component manages engine functions for optimal performance and efficiency. It is compatible with various John Deere 8030 and 8R Series Tractors, including models such as 8130, 8225R, 8230, 8230T, 8245R, 8270R, 8295R, 8320R, 8330, 8330T, 8345R, 8360R, 8360RT, 8430, 8430T, and 8530. Additionally, it fits John Deere 6068H, 6090H, and 6135H engines. Weighing approximately 0.82 kg, this controller ensures precise engine operation.