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

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.

Available Options:

  Hardware (+$3.25)

  Select Vehicle to Check Fitment
In Stock
  Name Price Select
Thermostat (A4)(A3)(B4)(B5.5) Thermostat (A4)(A3)(B4)(B5.5) $18.95
Thermostat [OEM](A4)(A3)(B4) Thermostat [OEM](A4)(A3)(B4) $49.95
  • Golf TDI MkIV (A4 chassis) w/ ALH Engine (1999-2003)
  • Jetta TDI MkIV (A4 chassis) w/ ALH Engine (1999-2003)
  • Jetta Wagon TDI (A4 chassis) w/ ALH Engine (2002-2003)
  • New Beetle TDI (A4 chassis) w/ ALH Engine (1998-2003)
Febi (or FErdinand BIlstein company) makes a variety of technical wear parts for aftermarket applications--everything from fluids to ball joints to camshafts.

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