Massively late, but i was on thehunt for 4B0121101P as the seal had gone where it clips to engine side.
Aftermarket clip ends avaiable from couple of companies in UK, or two divisions of same firm: 'Borg and Beck' & 'Firstline'
Found a list of usefull ends with codes BTS for borg, and FTS for Firstline:
BTS1117 (Radiator drain end)
BTS1048 (Straight end)
BTS1111( 45deg angle) THE ONE I WANTED!!!
BTS 1121 (90 deg angle)
After using their cross refernce VAG codes to check with oemepc..... found the seal I needed. I didn't need the whole connector!
So: 4B0121101P RRP £200 ouch
turned into
N90765301 a 32 x 4 mm o-ring (Febi 29752) Two for £2.89!
Result.
Hope this helps others.
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