It has optimal durability, and its interchangeable part numbers are 4L0 910 551 H and 4L0 910 551 K. This ECU is intended for use on the front of the vehicle and is compatible with a variety of Audi models. Programming is required, and the unit has two terminals. With a length of 10 inches, a width of 6 inches, and a height of 1 inch, this is a high-quality ECU that is sure to meet your needs.