Window Lifter Channel Rear Left 64-79 Convertible Beetle. 151-847-365A

The metal profile of the window sash clamps the window (with a rubber in between), this gives the fact the metal "sash" frame is under tension for whole of its life. Metal that's under tension wear out, as simple as that... call it "metal tiredness"... so after enough years of service the tension will fade from your window sash, mainly because of corrosion at the ends (that's where it starts mainly). Your window will not go down nicely anymore, will hook and turn. 

Fits 64-79 Convertible Beetle only. 

LEFT SIDE. 

This is the rubber required - 

https://alanhschofield.com/ourparts/prod_2486133-Window-Lifter-Channel-Seal-5079-Beetle-6891-Bus-831837565.html