This Haldex control unit module is an OEM part for the 2000-2006 Audi TT Quattro MK1 8N with a 1.8L turbo engine. It is designed for easy installation and comes with a bolt-on mounting style, pin terminal type, and female connector type. The module is made in Germany and comes with a manufacturer warranty of 1 month. The part number for this module is 02D900554B and 02D900554C, and it is compatible with OE/OEM part numbers 02D 900 554 B and 02D900554C. This Haldex module is perfect for those looking to upgrade their Audi TT Quattro MK1 8N with a reliable and high-quality control unit.