Audi & VW 1.8T 20V Aluminium Quick-Connect Coolant Flange

The factory plastic coolant flange on 1.8T 20V engines is a known weak point — they crack with age and heat cycling, causing coolant leaks that quickly lead to overheating if left unchecked. This aluminium direct-replacement flange eliminates that failure point for good.

CNC-machined aluminium runs cooler, handles pressure better and simply won’t crack the way the OEM plastic part does. Worth doing as preventative maintenance on any 1.8T 20V build.

• Material: Aluminium (replaces factory plastic)
• Fitment: VW MK4 Golf/Jetta 1.8T — 2000–2005
• Fitment: Audi TT 1.8T 180hp — 2000–2006
• Direct replacement, no modification required
• Eliminates OEM plastic flange cracking