GolfGTIforum.co.uk
General => General discussion => Topic started by: bricey on 27 February 2012, 16:54
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http://www.r32oc.com/general-chat/40485-mk4-sap-hoses.html#post423529
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its brake vacuum servo pipe :grin:
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Yep brake servo hose, good luck getting one they have modified them a few times.
I had mine replaced with fuel hose, has been fine every since.