Hi members,

I have taken the car to an expert mechanic who advised me to replace primary coolant tank to fix the overheating problem ( water coming out of cap ) caused by broken cap also as he mentioned a possible tiny hole/crack in the bottle it self, attached pic of the broken cap.

I looked online and it shows 2004-2006 replacement part is 3w0121403d
pictures on eBay attached below shows two part numbers on the bottle, could anyone advice please.

P.S. The OEM part is expensive being brand new, so I am looking for a cheap second hand part or a cross reference cheaper than Bentley logo on it

These 3 pics are from eBay




this cap is my broken cap

 

should be this one
Volkswagen Phaeton (3D) Sedan 4.2 V8 40V 4Motion (BGH) Coolant Reservoir
OEM 3D0121403F

 

thanks for the reply, any differences between
3D0121403F and 3D0121407H

i searched on eBay for the supplied number, and it shows both numbers above compatible.