The VW MK4 Coolant Expansion Tank by Febi Bilstein is an OEM replacement for a MK4 (See Vehicle Compatibility), or it can be used with our Expansion Tank Relocation Bracket for use in a MK2, Corrado or MK3. Can be purchased with or without the Expansion Tank Cap.
The Coolant Expansion Tank comes with a built in level sensor.
One (1) Coolant Expansion Tank, PN: 1J0 121 403 B
Optional Selection: One (1) Expansion Tank Cap, PN: 3B0 121 321