OEM VW Thermostat housing for A4 chassis TDIs, (ALH). This housing gets brittle with age and often breaks when removing to access the thermostat.

Does not include O-ring, however an O-ring is included with the thermostat.

The bolts that secure this flange to the block are one use only. Replace when replacing or removing flange.

For 2004-2005 Golf, Jetta and New Beetle TDI, the BEW flange is here.