Skip to content

Genuine VW/Audi Expansion Tank Cap


Product availability:

  • Ships from ECS facility within the US in 1-2 business days.
  • Average shipping and processing times take about 1.5 weeks.

The coolant expansion tank cap maintains an elevated cooling system pressure to raise the boiling point of the liquid coolant, while venting excessive pressure to atmosphere. These caps have a limited service life; they should be pressure-tested as part of a routine maintenance schedule, and replaced as part of any major cooling system overhaul.

Comes with seal.