Thermostat Housing/Coolant Flange (A4 ALH)

OEM Number: 038121121 Manufacturer Number: 18230

$6.95

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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.

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Thermostat [Mahle] (A4)(A3)(B4)(B5.5) Thermostat [Mahle] (A4)(A3)(B4)(B5.5)Now includes OE-style locking tabs. Thermostat for A4, A3 chassis cars and B4 and B5.5 Passat TDI. Includes the O-ring seal. Now includes OE-style locking tabs. Thermostat for A4, A3 chassis cars and B4 and B5.5 Passat TDI. Includes the O-ring seal.... $18.95
Thermostat [OEM](A4)(A3)(B4) Thermostat [OEM](A4)(A3)(B4)Thermostat for A3, A4 and B4 & B5 chassis cars. Includes the O-ring seal. You may also want to order Thermostat for A3, A4 and B4 & B5 chassis cars. Includes the O-ring seal. You may also want to order... $39.95

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.

If you want something done right, do it yourself. This is the attitude we take to our own products. IDParts.com branded items have been designed and manufactured to our specific requirements, focusing on quality and reliability.
Volkswagen
  • 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)

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