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VW MKIII-A3/B4 TDIs This is a discussion about MKIII-A3/MkIII Jetta/Golf (<99.5) and B4 Passats (96,97) TDI's. Non TDI related postings will be moved or removed.

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Old November 22nd, 2017, 18:55   #16
Veteran Member
Join Date: Aug 2011
Location: NJ 08002
Fuel Economy: Dismal

Like Steve mentioned, run a A2 filter. I'm running one in the wagon, when I was having air infiltration.

I was seeing the same on the sedan with a new filter, so I found a hvac o-ring that was a little beefier and it cured the issue.

'96 B4V: Kerma tune and PP520s
'97 B4: Stock
Rabbit build
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