Thermostat Replacement Kit (A4 ALH)

OEM Number: 038121121KT Manufacturer Number: 044121113

$24.95

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On Order (ETA 05/28)  Notify Me

Thermostat replacement kit for ALH engines complete with new thermostat, housing, seal and bolts

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Rowe G13 Coolant Concentrate 1 Gallon Rowe G13 Coolant Concentrate 1 GallonNew updated coolant G13 replaces the old G12++ One Gallon of VW specification G13 Coolant by Rowe.  Concentrated - must be New updated coolant G13 replaces the old G12++ One Gallon of VW specification G13 Coolant by Rowe.  Concentrated - must be... $20.95

IDParts has put together a complete service kit for a thermostat replacement on 1999-2003 Mk. IV TDIs. Often times, the thermostat housing breaks upon removal of the thermostat, or a bolt gets lost or stripped. This kit solves that problem and includes everything you need to successfully replace the thermostat:

  • Thermostat w/ OEM style locking tabs (makes installation MUCH MUCH easier)
  • Thermostat Housing
  • Thermostat Housing O-Ring Seal
  • 2 Thermostat to Block Bolts

Coolant is available as an add-on below.  If you properly lock in the thermostat to the housing you should lose less than a quart of coolant.  

IDParts Expert Kits are made for the expert DIY'er or professional. Containing all the parts needed to get the job done, these kits are custom assembled by IDParts using the highest quality components from manufacturers around the world.
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)

Frequently Asked Questions

The thermostat is available individually: https://www.idparts.com/thermostat-a4a3b4b55-p-652.html
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What our customers say...

Warm again Yay

Rated

03 ALH Jetta was slow to reach operating temperature, and had difficulty maintaining operating temperature. New thermostat fixed it up nice. Heats up in a jiffy, and stays toasty warm.

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